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Lagevrio

molnupiravir
Used for COVID-19

Lagevrio (molnupiravir) is an antiviral medication that was given Emergency Use Authorization (EUA) by the FDA in December 2021 to treat people with mild-to-moderate COVID-19. It's a capsule that's taken by mouth and a full course of treatment only lasts 5 days. Most people don't have many side effects with Lagevrio (molnupiravir). But possible side effects include diarrhea, nausea, and dizziness. Lastly, this medication doesn't have any known medication interactions.

Reviewed by:Last reviewed on April 6, 2023
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What is Lagevrio (molnupiravir)?

What is Lagevrio (molnupiravir) used for?

  • Mild-to-moderate COVID-19 in adults who are at high risk for severe illness and aren't able to receive other FDA-authorized treatments

How Lagevrio (molnupiravir) works

Lagevrio (molnupiravir) is a nucleoside analog that treats COVID-19 by targeting the virus. It works by disrupting the process that the virus uses to make copies of itself. This means the virus won't be able to make any more copies of itself to further spread infection.

When does Lagevrio (molnupiravir) start working?Time passed since treatment started:
HOURS
DAYS
Full effect
WEEKS
MONTHS

Drug facts

Common BrandsLagevrio
Drug ClassAntiviral
Controlled Substance ClassificationNot a controlled medication
Generic StatusNo lower-cost generic available
AvailabilityNot FDA-approved yet
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Side effects of Lagevrio (molnupiravir)

The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.

Common Side Effects

  • Diarrhea (2%)

Less Common Side Effects

  • Nausea
  • Dizziness

Lagevrio (molnupiravir) serious side effects

Contact your healthcare provider immediately if you experience any of the following.

  • Serious allergic reaction: feeling faint, dizziness, trouble breathing, swelling in the face, swollen tongue, difficulty swallowing, itchy skin, rash, hives, nausea, vomiting

Source: DailyMed

The following Lagevrio (molnupiravir) side effects have also been reported

Side effects that you should report to your care team as soon as possible:

Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):

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Pros and cons of Lagevrio (molnupiravir)

Pros

  • Can be taken at home, instead of needing to receive treatment at a facility
  • Taken by mouth, good for people who are afraid of needles
  • Only need to take it for 5 days
  • No known interactions with other medications

Cons

  • Not a first-choice medication for COVID-19
  • Need to take it within 5 days of getting sick with COVID-19
  • Can't be used in people with severe COVID-19 illness, including those who are hospitalized
  • Not recommended for people under age 18 years old because of high risk for bone and cartilage damage
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Pharmacist tips for Lagevrio (molnupiravir)

pharmacist
  • You can take Lagevrio (molnupiravir) with or without food. Swallow the tablets whole. Don't chew, crush, or break the medication because it might not work as well.
  • For each dose of the medication, you should be taking four capsules total at one time. Each capsule contains 200 mg of Lagevrio (molnupiravir).
  • Finish your full 5-day course of Lagevrio (molnupiravir) even if you feel better before you're done. Stopping this medication too early can put you at risk for serious COVID-19 illness. Make sure to take steps to protect yourself and others while you're taking this medication in order to get well soon and to prevent others from getting sick with COVID-19.
  • If you miss a dose of Lagevrio (molnupiravir) and it's been less than 10 hours since the time you usually take it, then take your dose as soon as possible and continue with your regular schedule. But if more than 10 hours have passed since the time you usually take it, just skip this dose and take your next dose at your regularly scheduled time. Never take two doses of the medication to make up for a missed dose.
  • Lagevrio (molnupiravir) is prescribed for you only. Don't share it with others, even if they have similar symptoms as you. This medication might not be right for everyone.
  • If you're sexually active and able to have children, make sure to use birth control when you're taking Lagevrio (molnupiravir) because this medication might cause birth defects. Women are recommended to use birth control during treatment and for 4 days after the last dose of Lagevrio (molnupiravir).
  • Lagevrio (molnupiravir) might cause damage to sperm. Men who are sexually active with women are recommended to use a form of birth control (e.g., condoms) during treatment and for at least 3 months after the last dose of Lagevrio (molnupiravir).
  • If your COVID-19 symptoms get worse, get medical help right away. This medication won't prevent all COVID-19 cases from getting worse. Call 911 if you experience symptoms such as worsening cough, trouble breathing, chest pain that doesn't go away, confusion, hard time staying awake, and pale or blue-colored skin.
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Risks and warnings for Lagevrio (molnupiravir)

Lagevrio (molnupiravir) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.

Birth defects

  • Risk factors: Currently pregnant

Babies born to mothers who take Lagevrio (molnupiravir) during pregnancy might be at risk for birth defects. Because of this risk, your provider might ask you to take a pregnancy test before you start this medication. In some cases, your provider and you might decide the need to use Lagevrio (molnupiravir) during pregnancy outweighs its risks. If you decide to take this medication, you're highly encouraged to join the COVID-19 International Pregnancy Registry.

To prevent pregnancy while taking Lagevrio (molnupiravir), women who are able to have children should use birth control during treatment and for 4 days after the last dose of Lagevrio (molnupiravir). Men who are sexually active with women should use birth control during treatment and for at least 3 months after the last dose of Lagevrio (molnupiravir).

Bone and cartilage damage

  • Risk factors: People under 18 years old

Lagevrio (molnupiravir) can't be used in people younger than 18 years old because it might cause bone and cartilage damage. Let your provider know if you have signs and symptoms of bone or cartilage damage, including joint or bone pain, swelling of the joints, and a clicking or grinding sensation in the joint.

Risk of serious allergic reaction

Though rare, some people have experienced serious allergic reactions after taking Lagevrio (molnupiravir). Get medical help right away if you experience symptoms of anaphylaxis, including swelling in the face, trouble breathing, and hives.

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Lagevrio (molnupiravir) dosage

The average cost for 40 capsules of 200mg of Lagevrio (molnupiravir) is $1,011.18 with a free GoodRx coupon. This is 17.70% off the average retail price of $1,228.65.
capsuleCapsule
DosageQuantityPrice as low asPrice per unit
200mg40 capsules$1,011.18$25.28

Typical dosage for Lagevrio (molnupiravir)

The typical dose is 800 mg (taken as four 200 mg capsules) by mouth every 12 hours for 5 days.

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How much does Lagevrio (molnupiravir) cost?

To access savings, use a GoodRx coupon and pay just a fraction of the retail price.
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What are alternatives to Lagevrio (molnupiravir)?

There are a number of medications that your doctor can prescribe in place of Lagevrio (molnupiravir). Compare a few possible alternatives below.
Lagevrio (molnupiravir)
Used for:
  • Mild-to-moderate COVID-19 in adults who are at high risk for severe illness and aren't able to receive other FDA-authorized treatments
$1,011.18Lowest GoodRx priceView prices
Used for:
  • Mild-to-moderate COVID-19 in people ages 12 years and older (and weighing over 88 lbs) who are at high risk for severe illness
$1,442.54Lowest GoodRx priceView prices
Used for:

Treatment of COVID-19 infection in people aged 28 days or older and weigh at least 3 kg (6.6 lbs), and are either: - Hospitalized or - Not hospitalized but have mild-to-moderate COVID-19 and are at high risk of developing severe COVID-19

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News about Lagevrio (molnupiravir)

References

Best studies we found

Bernal, A. J., e tal. (2022). Molnupiravir for Oral Treatment of Covid-19 in Nonhospitalized Patients. The New England Journal of Medicine.

Centers for Disease Control and Prevention. (2023). People with Certain Medical Conditions.

Merck Sharp & Dohme LLC. (2023). LAGEVRIO- molnupiravir capsule [package insert]. DailyMed.

GoodRx Health has strict sourcing policies and relies on primary sources such as medical organizations, governmental agencies, academic institutions, and peer-reviewed scientific journals. Learn more about how we ensure our content is accurate, thorough, and unbiased by reading our editorial guidelines.