TPOXX Side Effects
Generic name: tecovirimat
Medically reviewed by Drugs.com. Last updated on Nov 17, 2023.
Note: This document contains side effect information about tecovirimat. Some dosage forms listed on this page may not apply to the brand name TPOXX.
Applies to tecovirimat: oral capsule.
Serious side effects of TPOXX
Along with its needed effects, tecovirimat (the active ingredient contained in TPOXX) 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 immediately if any of the following side effects occur while taking tecovirimat:
Less common
- Headache, severe and throbbing
Other side effects of TPOXX
Some side effects of tecovirimat 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:
Less common
- Anxiety
- belching
- bloated, full feeling
- burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
- change in taste
- chapped lips
- chest pain or discomfort
- chills
- difficulty in moving
- discouragement
- dry mouth
- excess air or gas in the stomach
- fast or pounding heartbeat
- feeling sad or empty
- fever
- general feeling of discomfort or illness
- heartburn
- indigestion
- irritability
- itching, skin rash
- lack of appetite
- loss of interest or pleasure
- loss of taste
- moderate diarrhea
- mouth or throat pain
- muscle pain or stiffness
- nausea
- pain, swelling, or redness in the joints
- redness or swelling of the face
- stomach discomfort, upset, or pain
- thirst
- trouble concentrating
- trouble sleeping
- unusual tiredness or weakness
- vomiting
For Healthcare Professionals
Applies to tecovirimat: intravenous solution, oral capsule.
General
The safety of this drug has not been studied in patients with smallpox disease. The reported adverse reactions are for studies in healthy subjects.[Ref]
Dermatologic
Frequency reported as less than 2%: Palpable purpura, rash, pruritic rash, facial redness, facial swelling and pruritus[Ref]
Gastrointestinal
Common (1% to 10%): Nausea, abdominal pain, vomiting
Frequency reported as less than 2%: Dry mouth, dyspepsia, eructation, oral paresthesia[Ref]
Local
Intravenous administration:
Very common (10% or more): Infusion site pain (73%), swelling (39%), erythema (23%), extravasation (19%)[Ref]
Musculoskeletal
Frequency reported as less than 2%: Arthralgia, osteoarthritis[Ref]
Psychiatric
Frequency reported as less than 2%: Depression, dysphoria, irritability, panic attack[Ref]
Respiratory
Frequency reported as less than 2%: Oropharyngeal pain[Ref]
Nervous system
Very common (10% or more): Headache (up to 15%)
Frequency reported as less than 2%: Migraine, disturbance in attention, dysgeusia, paresthesia[Ref]
Frequently asked questions
More about TPOXX (tecovirimat)
- Check interactions
- Compare alternatives
- Drug images
- Dosage information
- During pregnancy
- FDA approval history
- Drug class: miscellaneous antivirals
- Breastfeeding
- En español
Patient resources
Professional resources
Related treatment guides
References
1. Product Information. Tpoxx (tecovirimat). SIGA Technologies, Inc.
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.
