Xiaflex Side Effects

Generic Name: collagenase clostridium histolyticum

Note: This document contains side effect information about collagenase clostridium histolyticum. Some of the dosage forms listed on this page may not apply to the brand name Xiaflex.

Some side effects of Xiaflex may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

For the Consumer

Applies to collagenase clostridium histolyticum: injection powder for solution

Along with its needed effects, collagenase clostridium histolyticum (the active ingredient contained in Xiaflex) 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 collagenase clostridium histolyticum:

More common—Dupuytren's contracture
  • Bruising or bleeding at the injection site
  • swelling of the hands
  • tearing of the skin
More common—Peyronie's disease
  • Itching, pain, redness, swelling, or bruise of the penis
  • popping sound or sensation in an erect penis
Less common—Peyronie's disease
  • Decreased interest in sexual intercourse
  • inability to have or keep an erection
  • loss in sexual ability, desire, drive, or performance
  • painful sexual intercourse
Incidence not known—Dupuytren's contracture
  • Bone pain
  • lower back or side pain
  • painful, swollen joints

Some side effects of collagenase clostridium histolyticum 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—Dupuytren's contracture
  • Blistering, burning, coldness, discoloration of the skin, feeling of pressure, hives, infection, inflammation, lumps, numbness, rash, scarring, stinging, tingling, or ulceration at the injection site
  • bruise
  • flushing, redness of the skin or unusually warm skin at the injection site
  • itching, pain, swelling, or tenderness at the injection site
  • swollen, painful, or tender lymph glands in the neck or armpit

For Healthcare Professionals

Applies to collagenase clostridium histolyticum: injectable powder for injection


Musculospiral side effects have included tendon ruptures and other serious injury to the injected extremity,


Local side effects have included swelling of the injected hand, contusion, injection site reaction and bleeding, and pain in the treated extremity.


Cardiovascular side effects have included vasovagal syncope after finger extension procedures.


Other side effects have included lymphadenopathy, lymph node pain, and axillary pain.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.