Dolutegravir: what it does and what to watch

Also known as: Integrase inhibitor, Antiretroviral · Antiretroviral (HIV integrase strand transfer inhibitor) · Updated 2026-08-20 · Educational — not medical advice

Illustrative — HIV, shown as a single virus particle

In plain language: This medicine blocks integrase, an enzyme HIV needs to insert its genetic material into the DNA of infected cells. Without this step the virus cannot make new copies of itself. Used together with other antiretroviral medicines, it can bring the amount of virus in the blood down to very low, often undetectable, levels over time, which protects immune function.

What it's used for

  • Treatment of HIV infection as part of combination antiretroviral therapy
  • Reducing viral load to help protect immune function
  • Supporting long-term viral suppression alongside other HIV medicines

Common side effects

  • Headache
  • Trouble sleeping
  • Nausea
  • Fatigue
  • Weight gain

Get medical help if…

Liver inflammation, particularly in people also living with hepatitis B or C

Allergic-type reactions with fever, rash, and fatigue that need urgent evaluation

Mood changes including rarely worsening depression, anxiety, or in rare cases suicidal thoughts

Lab values it can move

Few guides tell you this part: medicines show up in blood work. If you take Dolutegravir and a value below looks off on your report, this may be part of the story — never stop a medicine without your doctor.

Liver enzymes are checked periodically, especially in people who also have hepatitis B or C, since this class of medicine can occasionally cause liver inflammation.

SGPT (ALT)

This medicine can cause a modest, expected rise in creatinine by affecting how the kidneys handle it, without this reflecting true kidney damage; a prescriber interprets this in context.

Creatinine

Weight gain associated with this medicine class can, over time, contribute to shifts in blood sugar, so fasting glucose may be checked periodically.

Fasting Glucose

Good to know

  • This medicine must be taken exactly as prescribed, alongside the other HIV medicines, every day, for it to keep working
  • Missing doses or stopping suddenly can allow the virus to develop resistance to treatment
  • Report any new medicine, including over-the-counter antacids or supplements, since some reduce absorption of this medicine
  • Regular blood tests monitor liver function and viral load over the course of treatment
  • Weight and metabolic changes are monitored over time as part of routine care

Questions people ask

Can I skip a dose occasionally if I feel well?

No. Missed or irregular doses allow the amount of virus in the blood to rise, giving it a chance to develop resistance to this medicine and potentially to others in the same combination. Feeling well is actually a sign the treatment is working, not a reason to pause it. Taking it consistently, every day, is what keeps the virus suppressed long term.

Why does timing with antacids or supplements matter?

Products containing calcium, magnesium, or iron can bind to this medicine in the gut and reduce how much is absorbed, weakening its effect. Spacing these products apart from this medicine, as advised by a prescriber or pharmacist, helps ensure full absorption so the combination therapy keeps working as intended to control the virus.

Taking Dolutegravir? See what your blood work says.

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