Side Effects

Drug information provided by: Micromedex

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.

Also, because of the way cancer medicines act on the body, there is a chance that they might cause other effects that may not occur until months or years after these medicines are used. These delayed effects may include certain types of cancer. Discuss these possible effects with your doctor.

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

Less common

  1. Black, tarry stools
  2. blood in urine or stools
  3. cough or hoarseness
  4. fever or chills
  5. lower back or side pain
  6. pain or redness at place of injection
  7. painful or difficult urination
  8. pinpoint red spots on skin
  9. unusual bleeding or bruising


  1. Shortness of breath, itching, or wheezing

Check with your doctor as soon as possible if any of the following side effects occur:

More common

  1. Missing menstrual periods
  2. painful rash

Less common

  1. Dizziness
  2. joint pain
  3. loss of hearing
  4. ringing in ears
  5. swelling of feet or lower legs


  1. Numbness, tingling, or burning of fingers, toes, or face
  2. sores in mouth and on lips
  3. yellow eyes or skin

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. Nausea and vomiting (usually lasts only 8 to 24 hours)

Less common

  1. Confusion
  2. diarrhea
  3. drowsiness
  4. headache
  5. loss of appetite
  6. metallic taste
  7. weakness

This medicine may cause a temporary loss of hair in some people. After treatment with mechlorethamine has ended, normal hair growth should return.

After you stop using this medicine, it may still produce some side effects that need attention. During this period of time, check with your doctor immediately if you notice the following side effects:

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.