References UK clinical guidance from the NHS, the British HIV Association (BHIVA), and the British Association for Sexual Health and HIV (BASHH). Last updated: April 2026.
Dolutegravir (brand name Tivicay) is one of the most widely prescribed HIV drugs in the world. It’s an integrase strand transfer inhibitor (INSTI) known for its high efficacy, good tolerability, high barrier to resistance and relatively few drug interactions compared to boosted protease inhibitors. Dolutegravir is found in several combination tablets including Dovato, Triumeq and Juluca.
Here’s what you need to know about dolutegravir.
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How Dolutegravir Works
After HIV converts its RNA into DNA, it needs to insert that DNA into the host cell’s chromosomes using an enzyme called integrase. Dolutegravir blocks this step, preventing HIV from permanently establishing itself in CD4 cells.
Where You’ll Find Dolutegravir
| Product | Other Ingredients |
|---|---|
| Tivicay | None (standalone) |
| Dovato | Lamivudine |
| Triumeq | Abacavir + lamivudine |
| Juluca | Rilpivirine |
Dosing
- Standard dose: 50mg once daily
- With certain interacting drugs (rifampicin, some anticonvulsants): 50mg twice daily
- Can be taken with or without food
- Take 2 hours before or 6 hours after antacids, calcium, iron or magnesium supplements
Side Effects
- Insomnia — the most commonly reported side effect
- Headache
- Weight gain — associated with dolutegravir in clinical studies
- Mood changes — uncommon but reported
- Nausea (usually mild)
- Raised creatinine — a lab effect, not kidney damage
High Barrier to Resistance
One of dolutegravir’s key advantages is its high barrier to resistance. In clinical trials, resistance to dolutegravir was extremely rare in people taking it as part of their first regimen. This makes it a reliable cornerstone of treatment.
Pregnancy
Early concerns about a possible link between dolutegravir and neural tube defects have been largely addressed by subsequent data showing the absolute risk is very low. Dolutegravir is now considered acceptable in pregnancy by most guidelines, including BHIVA, though individual discussion with your HIV specialist is important.
Drug Interactions
Dolutegravir has fewer interactions than boosted PIs, but some are important:
- Metformin — dolutegravir raises metformin levels; dose adjustment may be needed
- Antacids, calcium, iron, magnesium — timing separation required
- Rifampicin — dolutegravir dose must be increased to twice daily
- Some anticonvulsants — may reduce dolutegravir levels
Read more: Dovato | Biktarvy | What is HIV?
Frequently Asked Questions
Is dolutegravir the best HIV drug?
It’s one of the most widely recommended. Its combination of efficacy, tolerability, high resistance barrier and few interactions makes it a first-line choice globally.
Can dolutegravir cause insomnia?
Yes, insomnia is the most commonly reported side effect. Taking it in the morning rather than at bedtime may help some people.
Is dolutegravir safe in pregnancy?
Current evidence suggests the risk of neural tube defects is very low. Most UK guidelines now consider dolutegravir acceptable in pregnancy with individual discussion.
Related reading
- Choosing the Right PrEP Drug: Truvada vs Descovy
- Dovato for HIV: A Two-Drug Regimen
- Triumeq for HIV: A Straightforward Guide
- Efavirenz for HIV: An Older NNRTI Still in Use
- Eviplera: How This Anti-HIV Drug Works
Sources
- NHS — Sexual health conditions
- BASHH — UK clinical guidelines for STI management
- British HIV Association (BHIVA) — HIV treatment guidelines
- Terrence Higgins Trust — sexual health information
- UK Health Security Agency — STI surveillance data
Steve Page is a recognised expert on Sexually Transmitted Diseases (STDs) and STD treatments, having published numerous articles in peer-reviewed journals and presented his research at conferences around the world. He has an in-depth understanding of the latest medical research on STDs, and is an advocate for the development of new treatments and protocols to improve the health of those affected. In addition to his research, he has dedicated his career to understanding the causes and symptoms of STDs, as well as how to best treat those impacted.
