Xapavir Dolutegravir 50mg Tablet

Q1: What is Dolutegravir 50mg (Xapavir) used for?

Dolutegravir 50mg is a first-generation integrase strand transfer inhibitor (INSTI) used as part of combination HIV-1 therapy for treatment-naive and treatment-experienced adults and children. It is a preferred first-line component in WHO, US, and European HIV treatment guidelines.

Q2: How does Dolutegravir prevent HIV from integrating into cells?

Dolutegravir inhibits HIV integrase enzyme, which cuts host DNA and inserts viral DNA into the chromosome. By blocking this strand transfer step, Dolutegravir prevents viral DNA from permanently integrating into CD4 cells — stopping that cell from becoming a viral factory.

Q3: What is the recommended dose of Dolutegravir 50mg?

For treatment-naive adults: 50mg once daily. For treatment-experienced patients with suspected integrase resistance or on certain drug interactions (rifampicin, efavirenz): 50mg twice daily. Always follow your HIV specialist's instructions.

Q4: Are there special administration requirements for Dolutegravir?

Take at a consistent time each day, with or without food. Antacids (calcium, aluminium, magnesium), iron supplements, and calcium-fortified foods should be taken at least 2 hours before or 6 hours after Dolutegravir to avoid reduced absorption.

Q5: What are the most common side effects of Dolutegravir?

Common side effects include insomnia, headache, diarrhea, nausea, and dizziness. Neuropsychiatric symptoms (anxiety, depression, sleep disturbances) occur in a subset of patients and may require switching to an alternative regimen.

Q6: Does Dolutegravir have a high barrier to resistance?

Yes. Dolutegravir has the highest genetic barrier to resistance among all INSTIs — it requires multiple specific mutations to develop clinical resistance. This makes it highly durable and suitable for patients with prior treatment experience.

Q7: Is Dolutegravir safe during pregnancy?

Dolutegravir is now included in many guidelines as safe for pregnancy, including the first trimester. Earlier concerns about neural tube defects have been largely resolved by larger studies, though your HIV specialist and OB/GYN should jointly advise.

Q8: What neuropsychiatric effects should I watch for?

Some patients experience insomnia, nightmares, anxiety, depression, or mood changes on Dolutegravir. These effects are more common in patients with pre-existing psychiatric conditions. Report any significant mood changes to your doctor promptly.

Q9: What drug interactions affect Dolutegravir?

Major interactions: Rifampicin and rifabutin (require 50mg twice daily), metformin (increases levels — monitor renal function), dofetilide (contraindicated), and antacids/iron/calcium (reduce absorption — separate by 2–6 hours).

Q10: What monitoring is required during Dolutegravir treatment?

CD4 count and viral load at baseline, 4–8 weeks, then every 3–6 months. Liver function tests at baseline and periodically. Creatinine monitoring (Dolutegravir inhibits tubular secretion of creatinine, raising serum creatinine without true kidney damage).

Q11: How should Xapavir Dolutegravir be stored?

Store at room temperature away from light and moisture. Keep in original packaging. Keep out of reach of children.

Q12: Do I need a prescription for Dolutegravir?

Yes. Dolutegravir is a prescription-only antiretroviral. An HIV specialist must design your complete antiretroviral regimen and monitor viral load and CD4 count throughout treatment.