Drug Interaction Report

Consumer information for this interaction is not currently available.

MONITOR CLOSELY: Coadministration of intravenous immune globulin preparations with nephrotoxic agents may potentiate the risk of renal impairment. Many commercially available intravenous formulations of immune globulin contain sucrose as a stabilizer. Immune globulin products, particularly those that contain sucrose as a stabilizer and administered at daily doses of 350 to 400 mg/kg or greater, have been associated with renal dysfunction, acute renal failure, osmotic nephrosis, and death. Factors predisposing to acute renal failure include any degree of preexisting renal insufficiency, age greater than 65 years, diabetes mellitus, volume depletion, sepsis, paraproteinemia, and concomitant use of known nephrotoxic drugs.

MANAGEMENT: Intravenous immune globulin preparations should be administered cautiously in patients treated with other potentially nephrotoxic agents (e.g., e.g., aminoglycosides; polypeptide, glycopeptide, and polymyxin antibiotics; amphotericin B; adefovir; cidofovir; tenofovir; foscarnet; cisplatin; deferasirox; gallium nitrate; lithium; mesalamine; certain immunosuppressants; intravenous bisphosphonates; intravenous pentamidine; high intravenous dosages of methotrexate; high dosages and/or chronic use of nonsteroidal anti-inflammatory agents). The manufacturers recommend administering immune globulin infusions at the minimum concentration available and at the minimum rate of infusion feasible in such patients. Clinicians should ensure that patients are not volume depleted prior to the initiation of immune globulin therapy. Monitoring of urine output and renal function tests, including the measurement of blood urea nitrogen (BUN) and serum creatinine, is recommended prior to the initial infusion and at appropriate intervals thereafter. If renal function deteriorates, discontinuation of the product should be considered. Patients should be advised to seek medical attention if they experience symptoms that may indicate nephrotoxicity such as decreased urine output, sudden weight gain, fluid retention, edema, or shortness of breath.

Using cobicistat together with tenofovir can increase the effects of tenofovir, which can cause new or worse kidney problems. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Cobicistat is a medication used to boost the effects of some medications that treat HIV infection. However, using cobicistat together with other HIV medications, such as emtricitabine, may alter the blood levels and effects of both medications. Using emtricitabine with cobicistat may reduce or increase blood levels of cobicistat. Reduced blood levels of cobicistat may make cobicistat less effective and may cause overall HIV treatment to be less effective. Cobicistat may increase blood levels of emtricitabine which may increase the risk of side effects. Talk to your doctor or pharmacist if you have any questions on how to use these medications properly. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Food significantly increases the absorption of elvitegravir. You should take each dose of elvitegravir with a meal. Taking it on an empty stomach may lead to inadequate blood levels and reduced effectiveness of the medication in treating HIV infection.

Information for this minor interaction is available on the professional version.