Vitrakvi (larotrectinib) is a prescription drug prescribed for adults and children to treat solid tumors in certain situations. Vitrakvi comes as an oral capsule and oral liquid solution. It’s usually taken twice per day.

This section describes the usual dosages of Vitrakvi. Keep reading to learn more.

What are Vitrakvi’s forms?

Vitrakvi is available as an oral capsule and an oral liquid solution.

Note: Vitrakvi oral capsules should be swallowed whole and should not be crushed or chewed. If you have difficulty swallowing pills, talk with your doctor about taking the oral liquid solution form instead.

What strengths does Vitrakvi come in?

Vitrakvi comes in the following strengths:

  • Oral capsule: 25 milligrams (mg) and 100 mg
  • Liquid solution: 20 mg per milliliter (mg/mL)

What are the usual dosages of Vitrakvi for adults?

The information below describes dosages that are commonly prescribed or recommended. But be sure to take the dosage your doctor prescribes for you. They’ll determine the best dosage to fit your needs.

Dosage for solid tumors

The recommended dosage of Vitrakvi for adults is 100 mg taken twice per day.

What’s the dosage of Vitrakvi for children?

Vitrakvi is prescribed to treat tumors in children ages 1 month and older.

The dosage of Vitrakvi prescribed for children depends on their body surface area (BSA), which is measured in square meters (sq m). Your child’s doctor will calculate their BSA before prescribing Vitrakvi.

The dosage prescribed for children with a BSA of at least 1 sq m is the same as the dosage for adults: 100 mg taken twice per day. For children with a BSA of less than 1 sq m, the recommended dosage is 100 mg/sq m taken twice per day.

Is Vitrakvi prescribed long term?

Yes, Vitrakvi is usually prescribed as a long-term treatment. If you and your doctor determine that it’s safe and effective for your condition, you’ll likely take it long term.

Do not take more Vitrakvi than your doctor prescribes, as this can lead to harmful effects.

What to do in case you take too much Vitrakvi

Call your doctor right away if you think you’ve taken too much Vitrakvi. You can also call 800-222-1222 to reach America’s Poison Centers or use its online resource. But if you have severe symptoms, immediately call 911 (or your local emergency number) or go to the nearest emergency room.

Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or another healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.