MedicinerestrictedEssential

Abacavir

An antiretroviral tablet taken with other medicines to treat HIV-1 infection.

Clinical information

Common uses

HIV-1 infection, in combination with other antiretrovirals

Common side effects

feeling sick
headache
tiredness and feeling generally unwell
vomiting
unusual dreams and sleep problems

Cautions

serious, sometimes fatal allergic reactions (boxed warning)
HLA-B*5701 gene test needed before starting
never restart after an allergic reaction
not for moderate or severe liver impairment

Interactions

methadone (dose may need increasing)
riociguat (dose may need reducing)

Pregnancy: registry data show no increased birth-defect risk

Reference information, not medical advice — always follow your doctor or pharmacist. Source: DailyMed, dailymed.nlm.nih.gov, abacavir label, setid 44fb1e25-ad03-4a7f-9f35-2e29f5025661 (accessed 2026-08-16)

Approved brands & formulations2

Brand name	Dosage form	Strength	Importer	Category
Abacavir	Tablet	300 mg	—	restricted
Abacavir	Oral Liquid	100mg/5ml	—	restricted