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Protexel Side Effects

Generic name: protein c

Medically reviewed by Last updated on Mar 13, 2022.

Note: This document contains side effect information about protein c. Some of the dosage forms listed on this page may not apply to the brand name Protexel.

For the Consumer

Applies to protein c: intravenous powder for solution

Side effects requiring immediate medical attention

Along with its needed effects, protein c (the active ingredient contained in Protexel) 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 while taking protein c:

More common

  • Fainting or loss of consciousness
  • fast or irregular breathing
  • itching
  • lightheadedness
  • skin rash
  • swelling of eyes or eyelids
  • tightness in chest and/or wheezing
  • trouble with breathing

Incidence not known

  • Blurred vision
  • confusion
  • dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly
  • fever
  • sweating
  • unusual tiredness or weakness

Side effects not requiring immediate medical attention

Some side effects of protein c 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:

Incidence not known

  • Increased sweating
  • restlessness

For Healthcare Professionals

Applies to protein c: intravenous powder for injection


Uncommon (0.1% to 1%): Hypersensitivity/allergic reaction (itching and rash)[Ref]


Postmarketing reports: Hyperhidrosis[Ref]


Postmarketing reports: Restlessness[Ref]


Postmarketing reports: Injection site reaction[Ref]

More about Protexel (protein c)

Patient resources

Other brands


Professional resources

Related treatment guides


1. "Product Information. Ceprotin (protein C)." Baxter Healthcare Corporation (2022):

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.