Prazosin HCL Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Severe expression

  • Blood Pressure Drop Upon Standing
  • Dizzy

If experienced, these tend to have a Less Severe expression

  • Drowsiness
  • Head Pain

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • Fast Heartbeat
  • Feeling Faint
  • Heart Throbbing Or Pounding
  • Visible Water Retention

If experienced, these tend to have a Less Severe expression

  • Abnormally Low Blood Pressure
  • Constipation
  • Diarrhea
  • Dry Mouth
  • Feel Like Throwing Up
  • Low Energy
  • Nervous
  • Not Feeling Well
  • Numbness And Tingling
  • Rash
  • Throwing Up

RARE side effects


If experienced, these tend to have a Severe expression

  • Abnormal Liver Function Tests
  • Angina
  • Continued Painful Erection
  • Hives
  • Intraoperative Floppy Iris Syndrome
  • Pancreatitis
  • Slow Heartbeat
  • Stomach Cramps
  • Trouble Breathing
  • Vasculitis

If experienced, these tend to have a Less Severe expression

  • Feeling Weak
  • Frequent Urination
  • Inability To Have An Erection
  • Ringing In The Ears

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.