Do not take this medicine with any of the following medications:

-alfuzosin
-carbamazepine
-certain medicines for blood pressure, heart disease, irregular heart beat like dronedarone, ranolazine
-certain medicines for depression, anxiety, or psychotic disturbances like lurasidone, pimozide
-certain other antiviral medicines for HIV or AIDS like indinavir and nevirapine
-cisapride
-drospirenone
-fosphenytoin
-irinotecan
-medicines for cholesterol like lovastatin, simvastatin
-medicines for headaches like dihydroergotamine, ergotamine, methylergonovine
-midazolam
-naloxegol
-phenobarbital
-phenytoin
-rifampin
-sildenafil
-St. John''s wort
-triazolam

This medicine may also interact with the following medications:

-bosentan
-certain antibiotics like clarithromycin, erythromycin, telithromycin, rifabutin
-certain other antiviral medicines for HIV or AIDS like darunavir, didanosine, efavirenz, elvitegravir, etravirine, fosamprenavir, lopinavir; ritonavir, maraviroc, nelfinavir, ritonavir, saquinavir, tenofovir, tipranavir
-certain medications for anxiety or sleep like buspirone, diazepam, zolpidem
-certain medicines for blood pressure and heart disease like amlodipine, carvedilol, diltiazem, felodipine, metoprolol, nifedipine, timolol, verapamil
-certain medicines for cancer like dasatinib, nilotinib, vinblastine, vincristine
-certain medicines for depression, anxiety, or psychiatric disturbances
-certain medicines for erectile dysfunction like avanafil, sildenafil, tadalafil, vardenafil
-certain medicines for fungal infection like itraconazole, ketoconazole, voriconazole
-certain medicines for hepatitis infection like boceprevir, simeprevir
-certain medicines for seizures like clonazepam, lamotrigine, oxcarbazepine
-certain medicines for stomach problems like antacids, H2-blockers, proton pump inhibitors
-certain medicines that treat or prevent blood clots like apixaban, betrixaban, dabigatran, edoxaban, rivaroxaban, warfarin
-colchicine
-female hormones, like estrogens and progestins and birth control pills
-medicines for cholesterol like atorvastatin, fluvastatin, pravastatin, rosuvastatin
-medicines for irregular heart beat like amiodarone, digoxin, disopyramide, flecainide, lidocaine, mexiletine, propafenone, quinidine
-medicines that lower your chance of fighting infection like cyclosporine, everolimus, sirolimus, tacrolimus
-narcotic medicines for pain like buprenorphine, buprenorphine; naloxone, fentanyl, methadone, tramadol
-phenothiazines like perphenazine, thioridazine
-risperidone
-salmeterol
-steroid medicines like betamethasone, budesonide, ciclesonide, dexamethasone, fluticasone, methylprednisolone, mometasone, triamcinolone

They need to know if you have any of these conditions:
-diabetes
-hemophilia
-kidney disease
-liver disease
-irregular heartbeat
-an unusual or allergic reaction to atazanavir, cobicistat, other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Visit your doctor or healthcare provider for regular check ups. Discuss any new symptoms with your doctor. You will need to have important blood work done while on this medicine.

HIV is spread to others through sexual or blood contact. Talk to your doctor about how to stop the spread of HIV.

This medicine may cause serious skin reactions. They can happen weeks to months after starting the medicine. Contact your healthcare provider right away if you notice fevers or flu-like symptoms with a rash. The rash may be red or purple and then turn into blisters or peeling of the skin. Or, you might notice a red rash with swelling of the face, lips or lymph nodes in your neck or under your arms.

Birth control pills may not work properly while you are taking this medicine. Talk to your doctor about using an extra method of birth control. Women who can still have children must use a reliable form of barrier contraception, like a condom.

This medicine may increase blood sugar. Ask your healthcare provider if changes in diet or medicines are needed if you have diabetes.

Keep out of the reach of children.

Store at room temperature of 25 degrees C (77 degrees F). Throw away any unused medicine after the expiration date.