Important Info on Reactions to Bactrim

Bactrim Side Effects to Report

There are a number of possible side effects with Bactrim that you should report immediately to your healthcare provider, including, but not limited to:
  • Signs of anemia, such as fatigue and pale skin
  • Signs of low white blood cells, such as frequent infections
  • Signs of low blood platelets, such as easy bruising or bleeding
  • Signs of kidney damage, such as very decreased urination
  • Signs of liver damage, such as yellow eyes or skin (jaundice), upper right abdominal pain, light-colored stools, or dark urine
  • Low blood sugar (hypoglycemia)
  • A cough or shortness of breath
  • Hallucinations
  • Depression
  • Signs of high potassium levels (hyperkalemia), including:


    • Abnormal sensations, such as burning, tingling, or pricking
    • Muscle weakness
    • Low heart rate (bradycardia)


  • Seizures
  • Watery or bloody diarrhea (which may occur long after you stop taking Bactrim)
  • Signs of an allergic reaction, such as:


    • An unexplained rash
    • Hives
    • Itching
    • Unexplained swelling (especially of the lips, mouth, or throat)
    • Wheezing or other breathing problems.


Other Possible Bactrim Side Effects

Other reported Bactrim side effects include:
  • Weakness
  • Fatigue
  • Insomnia
  • Nervousness
  • A spinning sensation (vertigo)
  • Headaches
  • Ringing of the ear (tinnitus)
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