Yellow: Adjust dosing

Label
Interaction requires management
Color
Yellow
Icon
Hazard Lights
Displaying 1 - 100 of 309
Interaction Color Code Clinical Bottom Line Clinical Effects Drug 1 effect Drug 2 dose Drug 2 effect Management
Lenacapavir Midazolam 1 Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential for increased sedation

Not reported

2.5 mg orally x 1 with food, administered 1 day after LEN

AUC increased 308%; Cmax increased 116%. AUC for 1-hydroxy metabolite decreased 16%.

If co-administering, monitor for excess sedation and adjust dose accordingly

Lenacapavir Zolpidem Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of excessive sedation

If coadministering, initiate lowest starting dose. Monitor for excessive sedation.

Lenacapavir Warfarin Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of bleeding

Use with caution. Monitor INR and for warfarin adverse effects (e.g. bleeding)

Lenacapavir Verapamil Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of verapamil adverse effects

If coadministering, monitor for cardiac medication adverse effects (e.g. hypotension)

Lenacapavir Vardenafil Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of vardenafil adverse effects (e.g. flushing, headache, hypotension)

If co-administering vardenafil for erectile dysfunction, dose should not exceed 5 mg per 24 hour. Monitor for adverse effects.

Lenacapavir Ubrogepant Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of ubrogepant adverse effects

If coadministering, avoid taking a second dose of ubrogepant within 24 hours

Lenacapavir Triazolam Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of triazolam adverse effects

If coadministering, monitor for triazolam adverse effects (e.g. sedation, respiratory depression).

Lenacapavir Triamcinolone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If used for local injections, monitor for corticosteroid-related adverse effects (e.g. Cushing's syndrome, adrenal insufficiency).

Lenacapavir Trazodone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of trazodone adverse effects (e.g. sedation, CNS effects)

If coadministering start with lowest dose and titrate to clinical effect. Monitor for trazodone-related adverse events.

Lenacapavir Tramadol Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of tramadol adverse effects

If coadministering, consider decreasing tramadol dose when coadministering. Titrate to clinical effect and monitor for sedation.

Lenacapavir Thioridazine Yellow: Adjust dosing Minimal data to guide interaction: risks likely to outweigh benefits

Potential loss of antiviral efficacy

Consider using alternative antipsychotic

Lenacapavir Tadalafil Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of tadalafil adverse effects (e.g. flushing, headache, hypotension)

Pulmonary arterial hypertension: coadministration of lenacapavir with tadalafil is not recommended. Erectile dysfunction: When used on an "as needed" basis, tadalafil dose should not exceed 10 mg every 72 hours. If used once daily (chronic administration), tadalafil dose should not exceed 2.5 mg daily.

Lenacapavir Tacrolimus Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of immunosuppressant adverse effects

Initiate adjusted dose of immunosuppressant to account for increased concentration and follow up with therapeutic drug monitoring to refine dosing. Monitor for adverse effects of immunosuppressant. Consult with specialist as necessary.

Lenacapavir Suvorexant Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of excessive sedation

If coadministering, initiate dose at 5 mg daily. May increase to 10 mg daily if not effective. Monitor for excessive sedation.

Lenacapavir Sirolimus Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of immunosuppressant adverse effects

Initiate adjusted dose of immunosuppressant to account for increased concentration and follow up with therapeutic drug monitoring to refine dosing. Monitor for adverse effects of immunosuppressant. Consult with specialist as necessary.

Lenacapavir Simvastatin Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of simvastatin adverse effects

Initiate simvastatin with the lowest starting dose and titrate to clinical effect. Monitor for adverse effects of lovastatin (e.g. myopathy, elevated transaminases).

Lenacapavir Sildenafil Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of sildenafil adverse effects (e.g. flushing, headache, hypotension).

Use of PDE-5 inhibitors for pulmonary arterial hypertension (PAH): Concomitant administration of SUNLENCA with tadalafil for the treatment of PAH is not recommended. Use of PDE-5 inhibitors for erectile dysfunction (ED): Refer to the prescribing information of sildenafil for dose recommendations. Use of PDE-5 inhibitors for pulmonary arterial hypertension (PAH): Do not coadminaster sildenafil with Lenacapavir. Use of PDE-5 inhibitors for erectile dysfunction (ED): Adjust dosing to avoid increased levels sildenafil

Lenacapavir Rivaroxaban Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of bleeding

Use with caution. Monitor for rivaroxaban adverse effects (e.g. bleeding). Avoid coadministration in persons with renal impairment (CrCL 15 - 80 ml/min) due to increased risk of bleeding.

Lenacapavir Rimegepant Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of rimegepant adverse effects

If coadministering, avoid taking a second dose of rimegepant within 48 hours

Lenacapavir Ranolazine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of ranolazine adverse effects

If coadministering, do not exceed ranolazine dose of 500 mg twice daily.

Lenacapavir Quetiapine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of quetiapine adverse effects (e.g. sedation, QT prolongation)

Consider using alternative antipsychotics. If coadministering, consider quetiapine dose reduction and monitor for adverse effects.

Lenacapavir Propafenone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of propafenone adverse effects

Consider using alternative antiarrhythmic or ARV. If coadministering, monitor for propafenone adverse effects.

Lenacapavir Prednisone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If co-administering, initiate with the lowest starting dose and titrate to clinical effect. Monitor for corticosteroid-related adverse effects (e.g. Cushing's syndrome, adrenal insufficiency).

Lenacapavir Prednisolone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If co-administering, initiate with the lowest starting dose and titrate to clinical effect. Monitor for corticosteroid-related adverse effects (e.g. Cushing's syndrome, adrenal insufficiency).

Lenacapavir Praziquantel Yellow: Adjust dosing Minimal data to guide interaction: risks likely to outweigh benefits

Potential increased risk of praziquantel adverse effects

Consider alternative antiretroviral. If coadministration is necessary, monitor for praziquantel adverse effects.

Lenacapavir Oxycodone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of oxycodone adverse effects

If coadministering, monitor therapeutic effects and adverse reactions (e.g. sedation, respiratory depression)

Lenacapavir Nifedipine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of nifedipine adverse effects

If coadministering, monitor for cardiac medication adverse effects (e.g. hypotension)

Lenacapavir Naloxegol Yellow: Adjust dosing Minimal data to guide interaction: risks likely to outweigh benefits

Increased risk of naloxegol adverse effects

Consider using alternative agents. If coadministration is unavoidable, decrease dose of naloxegol and monitor for adverse reactions.

Lenacapavir Mometasone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If coadministering, initiate lowest starting dose and titrate to clinical effect. Monitor for adverse effects such as adrenal insufficiency and Cushing's syndrome.

Lenacapavir Midazolam Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential for increased sedation

Not reported

2.5 mg orally x 1, administered simultaneously with LEN

AUC increased 259%; Cmax increased 94%. AUC for 1-hydroxy metabolite decreased 24%.

If co-administering, monitor for excess sedation and adjust dose accordingly

Lenacapavir Methylprednisolone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If used for local injections, monitor for corticosteroid-related adverse effects (e.g. Cushing's syndrome, adrenal insufficiency).

Lenacapavir Methadone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Unknown effect on methadone

If initiating methadone in a person already on lenacapavir, start with lowest feasible dose and titrate to clinical effect. If initiating lenacapavir in a person stable on methadone, dose adjustment of methadone may be required. Monitor for clinical efficacy and adverse effects (e.g. sedation, respiratory depression).

Lenacapavir Mefloquine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of mefloquine adverse effects

If coadministering, monitor for mefloquine adverse effects (e.g. QT prolongation)

Lenacapavir Mavacamten Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of mavacamten adverse effects

If initiating lenacapavir in patients stable on mavacamten, reduce mavacamten dose by one level (e.g. 15 mg to 10 mg, 10 mg to 5 mg, 5 mg to 2.5 mg). If initiating mavacamten in patients stable on lenacapavir, use typical starting dose (5 mg daily).

Lenacapavir Lurasidone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of lurasidone adverse effects

If initiating lurasidone in a person stable on lenacapavir, recommended starting dose is 20 mg daily, not to exceed 80 mg daily. If initiating lenacapavir in a person stable on lurasidone, reduce lurasidone dose by 50%

Lenacapavir Lumateperone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of lumateperone adverse effects

If coadministering, reduce lumateperone dose to 21 mg

Lenacapavir Lovastatin Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of lovastatin adverse effects

Initiate lovastatin with the lowest starting dose and titrate to clinical effect. Monitor for adverse effects of lovastatin (e.g. myopathy, elevated transaminases).

Lenacapavir Lidocaine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of lidocaine adverse effects

Consider using alternative antiarrythmic or ARV. If coadministering, monitor for lidocaine adverse effects.

Lenacapavir Hydrocortisone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If co-administering, initiate with the lowest starting dose and titrate to clinical effect. Monitor for hydrocortisone-related adverse effects.

Lenacapavir Fluticasone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If coadministering, initiate lowest starting dose and titrate to clinical effect. Monitor for adverse effects such as adrenal insufficiency and Cushing's syndrome.

Lenacapavir Fentanyl Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of fentanyl adverse effects

If coadministering, monitor therapeutic effects and adverse reactions (e.g. sedation, respiratory depression)

Lenacapavir Felodipine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of felodipine adverse effects

If coadministering, monitor for cardiac medication adverse effects (e.g. hypotension)

Lenacapavir Everolimus Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of immunosuppressant adverse effects

Initiate adjusted dose of immunosuppressant to account for increased concentration and follow up with therapeutic drug monitoring to refine dosing. Monitor for adverse effects of immunosuppressant. Consult with specialist as necessary.

Lenacapavir Ethosuximide Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased ethosuximide effects

If coadministering monitor for ethosuximide-related adverse events.

Lenacapavir Eszopiclone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of excessive sedation

If coadministering, initiate lowest starting dose. Monitor for excessive sedation.

Lenacapavir Eplerenone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of eplerenone adverse effects

If coadministering in the setting of post-MI heart failure, eplerenone dose not to exceed 25 mg daily. If coadministered for hypertension, initiate eplerenone at 25mg daily. Dose not to exceed 25 mg twice daily.

Lenacapavir Edoxaban Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of bleeding

Use with caution. Monitor for edoxaban adverse effects (e.g. bleeding)

Lenacapavir Dronedarone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of dronedarone adverse effects

Consider using alternative cardiac medication or ARV. If coadministering, monitor for dronedarone adverse effects.

Lenacapavir Diltiazem Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of diltiazem adverse effects

If coadministering, monitor for cardiac medication adverse effects (e.g. hypotension)

Lenacapavir Digoxin Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of digoxin adverse effects

Use with caution and monitor digoxin therapeutic concentration

Lenacapavir Diazepam Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of sedation, respiratory depression

Consider alternative benzodiazepines. If coadministering, use lowest effective dose and monitor for diazepam adverse effects.

Lenacapavir Dexamethasone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If co-administering, initiate with the lowest starting dose and titrate to clinical effect. Do not use doses of dexamethasone > 16 mg. Monitor for dexamethasone-related adverse effects.

Lenacapavir Daridorexant Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of excessive sedation

If coadministering, maximum dose of daridorexant is 25 mg.

Lenacapavir Dabigatran Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of bleeding

Use with caution. Monitor for dabigatran adverse effects (e.g. bleeding)

Lenacapavir Cyclosporine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of immunosuppressant adverse effects

Initiate adjusted dose of immunosuppressant to account for increased concentration and follow up with therapeutic drug monitoring to refine dosing. Monitor for adverse effects of immunosuppressant. Consult with specialist as necessary.

Lenacapavir Colchicine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of GI adverse effects

If using for gout flare may coadminister a single dose of 1.2 mg. May not repeat dose for at least 3 days. If using for Familiar Mediterranean Fever do not exceed colchicine dose of 1.2 mg daily.

Lenacapavir Cobicistat Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Increased risk of lenacapavir adverse effects

AUC increased 128%; Cmax increased 110%

150 mg once daily (in fed state)

Not reported

Management of interaction depends on component that cobicistat is serving as a PK booster for. See partner antiretroviral for further details.

Lenacapavir Clopidogrel Yellow: Adjust dosing Minimal data to guide interaction: risks likely to outweigh benefits

Potential increased risk of bleeding

Consider using alternative ARV or antiplatelet agents. If coadministering, monitor for clopidogrel-related adverse events (e.g. bleeding)

Lenacapavir Clonazepam Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of sedation, respiratory depression

Consider alternative benzodiazepines. If coadministering, use lowest effective dose and monitor for clonazepam adverse effects.

Lenacapavir Buspirone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of buspirone adverse effects

If coadministering start with lowest dose and titrate to clinical effect. Monitor for buspirone-related adverse events.

Lenacapavir Buprenorphine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Unknown effect on buprenorphine

If initiating buprenorphine in a person already on lenacapavir, start with lowest feasible dose and titrate to clinical effect. If initiating lenacapavir in a person stable on buprenorphine, dose adjustment of buprenorphine may be required. Monitor for clinical efficacy and adverse effects (e.g. sedation, respiratory depression).

Lenacapavir Budesonide Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If coadministering, initiate lowest starting dose and titrate to clinical effect. Monitor for adverse effects such as adrenal insufficiency and Cushing's syndrome.

Lenacapavir Brexpiprazole Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of brexpiprazole adverse effects

If coadministering in patients known to be poor CYP2D6 metabolizers, use 1/4 of brexpiprazole dose. Monitor for adverse events.

Lenacapavir Betamethasone Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of corticosteroid adverse effects (e.g. Cushing's syndrome and adrenal supression).

If used for local injections, monitor for corticosteroid-related adverse effects (e.g. Cushing's syndrome, adrenal insufficiency).

Lenacapavir Bedaquiline Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential for increased bedaquiline levels

Consider alternative agents. If coadministering, monitor LFTs and ECG.

Lenacapavir Avanafil Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of avanafil adverse effects (e.g. hypotension)

If coadministering, avanafil dose should not exceed 50 mg in 24 hours

Lenacapavir Artemether/Lumefantrine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of lumefantrine adverse effects

If coadministering, monitor for lumefantrine adverse effects (e.g. QT prolongation)

Lenacapavir Apixaban Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of bleeding 

Use with caution.  Monitor for apixaban adverse effects (e.g. bleeding)

Lenacapavir Amlodipine Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of amlodipine adverse effects

If coadministering, monitor for cardiac medication adverse effects (e.g. hypotension)

Lenacapavir Alprazolam Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential increased risk of sedation, respiratory depression

If coadministering, use lowest effective dose and monitor for alprazolam adverse effects

Lencapavir Alfuzosin Yellow: Adjust dosing Minimal data to guide interaction: weigh risks and benefits of using this combination

Potential for increased alfuzosin effects

Consider alternative to alfuzosin. If coadministered, monitor for adverse effects (e.g. hypotension)

Ritonavir Methadone 1053 Yellow: Adjust dosing Adjust dosing to avoid reduced levels of methadone Stable methadone dose

No significant effect

If coadministering monitor for signs and symptoms of methadone withdrawal. Some patients may require an increased methadone dose

Ritonavir Methadone 1052 Yellow: Adjust dosing Adjust dosing to avoid reduced levels of methadone

Not clinically significant

S-methadone AUC decreased 25%; R-methadone AUC decreased 20%

If coadministering monitor for signs and symptoms of methadone withdrawal. Some patients may require an increased methadone dose

Ritonavir Methadone 1051 Yellow: Adjust dosing Adjust dosing to avoid reduced levels of methadone

Decreased methadone effects (eg, methadone withdrawal)

90 mg daily x 2 years

Methadone AUC decreased

If coadministering monitor for signs and symptoms of methadone withdrawal. Some patients may require an increased methadone dose

Ritonavir Warfarin 1050 Yellow: Adjust dosing Adjust dosing to avoid increased or reduced levels of warfarin

Decreased warfarin effects (eg, decreased INR, increased risk of clotting)

12.5 mg daily

INR: decreased

If coadministering monitor INR and adjust warfarin as indicated. Monitor for signs and symptons of bleeding.

Ritonavir Vardenafil 1049 Yellow: Adjust dosing Adjust dosing to avoid increased levels of vardenafil

Increased tadalafil effects

5 mg daily

Vardenafil AUC increased 49-fold; Cmax increased 13-fold. T1 / 2 increased to 26 hours.

Initiate (and do not exceed) vardenafil 2.5 mg every 72 hours and monitor for adverse effects

Ritonavir Trazodone 1048 Yellow: Adjust dosing Adjust dosing to avoid increased levels of trazodone

Increased trazodone effects (eg, nausea, hypotension, syncope)

Not studied

50 mg x 1 dose

Trazodone AUC increased 240%; Cmax increased 34%; half-life: increased 220%

Decrease trazodone dose or start low and titrate to effect

Ritonavir Trazodone 1047 Yellow: Adjust dosing Adjust dosing to avoid increased levels of trazodone

Increased trazodone effects (eg, nausea, dizziness, hypotension, syncope)

Trazodone AUC increased 2.4-fold; Cmax increased 34%

Decrease trazodone dose or start low and titrate to effect

Ritonavir Tadalafil 1046 Yellow: Adjust dosing Adjust dosing to avoid increased levels of tadalafil

Increased tadalafil effects (eg, hypotension, priapism)

20 mg x 1

Tadalafil AUC increased 32%, Cmax decreased 30%

For erectile dysfunction initiate tadalafil 5 mg dose and do not exceed 10 mg every 72 hours. Monitor adverse effects. For patients taking a protease inhibitor (stable > 7 days) requiring tadalafil for pulmonary arterial hypertension initiate 20 mg once daily and increase to 40 mg once daily based on tolerability. Patients currently on tadalafil who require a PI should stop tadalafil ³24 hours before PI initiation, take the PI for 7 days, then resume tadalafil at 20 mg. Maximum recommended daily dose for treatment of BPH is 2.5 mg daily.

Ritonavir Tadalafil 1045 Yellow: Adjust dosing Adjust dosing to avoid increased levels of tadalafil

Increased tadalafil effects (eg, hypotension, priapism)

20 mg x 1

Tadalafil AUC increased 124%

For erectile dysfunction initiate tadalafil 5 mg dose and do not exceed 10 mg every 72 hours. Monitor adverse effects. For patients taking a protease inhibitor (stable > 7 days) requiring tadalafil for pulmonary arterial hypertension initiate 20 mg once daily and increase to 40 mg once daily based on tolerability. Patients currently on tadalafil who require a PI should stop tadalafil ³24 hours before PI initiation, take the PI for 7 days, then resume tadalafil at 20 mg. Maximum recommended daily dose for treatment of BPH is 2.5 mg daily.

Ritonavir Sildenafil 1044 Yellow: Adjust dosing Adjust dosing to avoid increased levels of sildenafil. (Do not coadminister for pulmonary hypertension)

Increased sildenafil effects (eg, hypotension, priapism)

100 mg x 1 dose

Sildenafil AUC increased 1000%; Cmax increased 290%; Tmax: delayed 3 hours

For erectile dysfunction, initiate sildenafil 25 mg every 48 hours and monitor for adverse effects. Manufacturer recommends not to exceed dose of 25 mg every 48 hours. Do not coadminister if using sildenafil for pulmonary arterial hypertension.

Ritonavir RFB 1043 Yellow: Adjust dosing Adjust dosing to avoid increased levels of rifabutin

Increased rifabutin effects (eg, uveitis)

150 mg daily x 24 days

Rifabutin AUC increased 400%; Cmax increased 250%

Decrease rifabutin to 150 mg every other day or 300 mg 3 times / week

Ritonavir MVC 1042 Yellow: Adjust dosing Adjust dosing to avoid increased levels of maraviroc

Increased maraviroc effects

100 mg BID

Maraviroc AUC increased 161%; Cmin increased 355%; Cmax increased 28%

Reduce dose of maraviroc to 150 mg BID with strong CYP3A4 inhibitors

Ritonavir Fentanyl 1041 Yellow: Adjust dosing Adjust dosing to avoid increased levels of fentanyl

Increased fentanyl effects (eg, increased sedation, confusion, respiratory depression)

5 mcg / kg

Fentanyl clearance decreased 67%

Monitor closely, start with low dose and titrate to pain response as indicated

Ritonavir Digoxin 1040 Yellow: Adjust dosing Adjust dosing to avoid increased levels of digoxin

Increased digoxin effects

0.4 mg x 1 dose

Digoxin AUC (0-8 hr): increased 29%; AUC (0-72 hr): increased 22%; clearance: decreased 30%; half-life: increased 43%

Digoxin dose may need to be decreased. Monitor digoxin level and adjust digoxin dose based on clinical signs and drug levels.

Ritonavir Colchicine 1039 Yellow: Adjust dosing Adjust dosing to avoid increased levels of colchicine

Increased colchicine effects

0.6 mg x 1

Colchicine AUC increased 296%; Cmax increased 184%

For treatment of gout, reduce colchicine dosage to 0.6 mg x 1 then 0.3 mg one hour later. Dose should not be repeated earlier than 3 days after. For gout prophylaxis, reduce colchicine dose to 0.3 mg daily if on 0.6 mg BID prior to PI therapy or reduce colchicine dose to 0.3 mg every other day if on 0.6 mg daily prior to PI therapy. For treatment of familial Mediterranean fever do not exceed colchicine 0.6 mg once daily or 0.3 mg BID. Do not coadminister in patients with hepatic or renal impairment.

Ritonavir Clarithromycin 1038 Yellow: Adjust dosing Adjust dosing to avoid increased levels of clarithromycin

Increased clarithromycin effects

AUC no significant change; Cmax increased 15%

500 mg BID

Clarithromycin AUC increased 77%; Cmax increased 31%; Cmin increased 182%

Reduce clarithromycin dose by 50% in patients with CrCl 30-60 mL / min. Reduce clarithromycin dose by 75% in patients with CrCl <30 mL / min.

Ritonavir Bosentan 1037 Yellow: Adjust dosing Adjust dosing to avoid increased levels of bosentan

Possible increased bosentan effects

Not studied

Not studied (may increase bosentan levels)

Start low and titrate bosentan to effect. If patient has been on protease inhibitor (other than unboosted atazanavir) for more than 10 days, start bosentan at 62.5 mg daily or every other day. If patient is currently on bosentan and requires a PI (other than unboosted atazanavir), stop bosentan for at least 36 hours prior to initiating ART. Wait 10 days and then resume bosentan starting with 62.5 mg daily or every other day.

Ritonavir ATV 1036 Yellow: Adjust dosing Adjust dosing to avoid increased levels of atazanavir

Increased atazanavir effects

Not studied

300 mg daily on days 1-20

Atazanavir AUC increased 238%; Cmax increased 86%; Cmin increased 1089%

Dose atazanavir 300 mg once daily with ritonavir 100 mg daily

Ritonavir Olanzapine 1035 Yellow: Adjust dosing Adjust dosing to avoid decreased levels of olanzapine

Decreased olanzapine effects

Not studied

10 mg daily

Olanzapine AUC decreased 53%; half-life: decreased 50%; clearance: increased 115%; Cmax decreased 40%

Monitor clinical improvement and adjust olanzapine as indicated

Ritonavir ETR 1034 Yellow: Adjust dosing Adjust dosing to avoid decreased levels of etravirine

Etravirine AUC decreased 46%; Cmax decreased 32%

For ritonavir boosting - refer to individual protease inhibitors for specific recommendation

Darunavir Warfarin 899 Yellow: Adjust dosing Adjust dosing to avoid reduced levels of warfarin

Decreased warfarin effects (e.g. decreased INR, increased risk of clotting)

Not reported

10 mg x 1

S-warfarin Cmax decrease 8%, AUC decrease 21%

If coadministering, monitor INR and adjust warfarin as indicated. Monitor for signs and symptons of bleeding.

Darunavir Sertraline 898 Yellow: Adjust dosing Adjust dosing to avoid reduced levels of sertraline

Potential decreased sertraline effects

No significant change

50 mg once daily

Cmax decrease 44%, AUC decrease 49%, Cmin decrease 49%

Titrate sertraline to effect; monitor to ensure continued response if darunavir / ritonavir initiated

Darunavir Paroxetine 897 Yellow: Adjust dosing Adjust dosing to avoid reduced levels of paroxetine

Potential decreased paroxetine effects

No significant change

20 mg once daily

Cmax decrease 36%, AUC decrease 39%, Cmin decrease 37%

Titrate paroxetine to effect; monitor for continued antidepressant response if darunavir / ritonavir initiated

Darunavir Methadone 896 Yellow: Adjust dosing Adjust dosing to avoid reduced levels of methadone

May decrease methadone effects (e.g. withdrawal)

Not reported

55-200 mg once daily (stable dose)

R-methadone: Cmax decrease 24%, AUC decrease 16%, Cmin decrease 15%; S-methadone: Cmax decrease 44%, AUC decrease 36%, Cmin decrease 40%

If coadministering monitor for signs and symptoms of methadone withdrawal. Some patients may require an increased methadone dose

Darunavir Solifenacin 895 Yellow: Adjust dosing Adjust dosing to avoid increased solifenacin levels

Potential for increased risk of zolpidem adverse effects

If coadministering, do not exceed solifenacin 5 mg once daily

Darunavir Saxagliptin 894 Yellow: Adjust dosing Adjust dosing to avoid increased saxagliptin levels

Potential for increased saxagliptin adverse effects

If coadministering, do not exceed saxagliptin dose of 2.5 mg once daily

Darunavir Pimavanserin 893 Yellow: Adjust dosing Adjust dosing to avoid increased pimavanserin levels

Potential for increased risk of pimavanserin adverse effects

If coadministering, decrease dose of pimavanserin to 10 mg once daily

Darunavir Vardenafil 892 Yellow: Adjust dosing Adjust dosing to avoid increased levels of vardenafil

Increased risk of vardenafil adverse effects (e.g. hypotension, priapism)

Do not exceed 2.5 mg dose in 72 hours

Darunavir Thioridazine 891 Yellow: Adjust dosing Adjust dosing to avoid increased levels of thioridazine

Potential for increased risk of thioridazine adverse effects

If coadministering, dose reduction may be necessary