Molnupiravir: uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Molnupiravir is an oral antiviral for early COVID-19 in higher-risk adults. It belongs to the COVID-19 antiviral group. These reduce the severity of COVID-19, working best when started early in high-risk people.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	COVID-19 antiviral
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Mild-to-moderate COVID-19 in adults at high risk of severe illness
Used when other COVID antivirals are unsuitable or unavailable
Started within the first few days of symptoms

Common brand names

India: Molnatris, Molxvir, Movfor
Worldwide: Lagevrio

Common side effects

Diarrhoea
Nausea
Dizziness
Headache

Before taking it — precautions

Not used in pregnancy, as it may harm the unborn baby; women should use reliable contraception during and for a short time after the course
Men should use contraception during and for some time after the course, as advised by the doctor
Not used in children and teenagers

When to see a doctor urgently

Severe allergic reaction: swelling of face, lips or throat, difficulty breathing (urgent)
Worsening breathlessness or low oxygen levels (urgent)
Symptoms getting worse despite treatment

Not a prescription — no dose shown. The right dose of molnupiravir depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Can I take molnupiravir if I am pregnant?

No. It is not used in pregnancy because it may harm the developing baby. Tell your doctor if you are or could be pregnant.

Why is it not given to children?

Studies raised concerns about effects on growing bones and cartilage, so it is only used in adults.

How is it different from Paxlovid?

Unlike Paxlovid, molnupiravir has very few drug interactions, but it is generally considered less effective, so it is often used when Paxlovid is not suitable.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.