abacavir, Ziagen (cont.)

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PREPARATIONS: Tablets: 300 mg; oral solution: 20 mg/ml

STORAGE: Capsules and solution should be stored at room temperature, 15C to 30 C (59 F to 86F). The oral solution may be refrigerated but should not be frozen.

PRESCRIBED FOR: Abacavir is used in combination with other anti-HIV drugs for the treatment of HIV infection.

DOSING: The recommended dose for adults is 300 mg twice daily or 600 mg once daily. Children (3 months and older) should receive 8 mg/kg twice daily of the solution, and the maximum recommended dose is 300 mg twice daily. Pediatric patients weighing 14 kg or more may also be treated with abacavir tablets at doses of 300, 450, or 600 mg daily based on weight. Abacavir may be administered with or without food since food does not affect its absorption.

DRUG INTERACTIONS: Alcohol competes with abacavir for elimination from the body. Therefore, alcohol consumption may increase the concentration of abacavir in the body, and this could lead to increased frequency or severity of side effects from abacavir. Abacavir does not affect the elimination of alcohol.

PREGNANCY: Use of abacavir during pregnancy has not been adequately evaluated.

NURSING MOTHERS: It is not known whether abacavir is excreted in breast milk. HIV infected mothers should not breast feed because of the potential risk of transmitting HIV to an infant that is not infected.

SIDE EFFECTS: The most common side effects are nausea, vomiting, headache, fatigue, allergic reactions, diarrhea, loss of appetite, and difficulty sleeping. Muscle pain, increased triglyceride levels, rash, anxiety, depression, and fever may also occur. The most serious side effects are severe allergic reactions, pancreatitis, liver failure, and metabolic disturbance (lactic acidosis). Symptoms of an allergic reaction include skin rash, fever, weakness, swelling and difficulty breathing. Abacavir must be stopped as soon an allergic reaction is suspected, and it should not be restarted after an allergic reaction.

Reference: FDA Prescribing Information

Last Editorial Review: 9/6/2012

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