Description and Brand Names

Drug information provided by: Merative, Micromedex®

US Brand Name

  1. Tpoxx

Descriptions


Tecovirimat injection is used to treat human smallpox disease caused by the variola virus.

This medicine is to be given only by or under the direct supervision of your doctor.

This product is available in the following dosage forms:

  • Solution

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of tecovirimat injection in children weighing less than 3 kilograms (kg). Safety and efficacy have not been established.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of tecovirimat injection in the elderly.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Repaglinide

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Calcium Acetate
  • Lanthanum Carbonate
  • Midazolam
  • Sevelamer Carbonate
  • Sevelamer Hydrochloride
  • Sucroferric Oxyhydroxide

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Diabetes—Use with caution. May cause side effect to become worse when used together with diabetes medicine (eg, repaglinide).
  • Kidney disease, severe—Should not be used in patients with this condition.
  • Weak immune system—Use with caution. The effects of may be decreased in patients with this condition.

Proper Use

A nurse or other trained health professional will give you this medicine. It is given through an IV catheter placed into one of your veins. It must be given slowly, so the IV will have to remain in place for at least 6 hours.

This medicine comes with a patient information leaflet. Read and follow the instructions carefully. Ask your doctor if you have any questions.

Precautions

It is very important that your doctor check your or your child's progress at regular visits to make sure this medicine is working properly. Blood and urine tests may be needed to check for unwanted effects.

This medicine may cause hypoglycemia (low blood sugar). Check with your doctor right away if you have anxiety, blurred vision, chills, cold sweats, coma, confusion, cool, pale skin, depression, dizziness, fast heartbeat, headache, increased hunger, nausea, nervousness, nightmares, seizures, shakiness, slurred speech, or unusual tiredness or weakness.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

Incidence not known

  1. Anxiety
  2. blurred vision
  3. chills
  4. cold sweats
  5. coma
  6. confusion
  7. cool, pale skin
  8. depression
  9. dizziness
  10. fast heartbeat
  11. headache
  12. increased hunger
  13. nausea
  14. nervousness
  15. nightmares
  16. seizures
  17. shakiness
  18. slurred speech
  19. unusual tiredness or weakness

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  1. Bleeding, blistering, burning, coldness, discoloration of skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the injection site

Less common

  1. Back pain
  2. change in color vision
  3. diarrhea
  4. difficulty in moving
  5. difficulty seeing at night
  6. increased sensitivity of the eyes to sunlight
  7. joint pain
  8. muscles aches, cramps, pains, stiffness, or tightness
  9. swollen joints

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Portions of this document last updated: July 01, 2024

Original article: https://www.mayoclinic.org/ar/drugs-supplements/tecovirimat-intravenous-route/before-using/drg-20569904