Phentermine HCL Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Severe expression

  • High Blood Pressure

If experienced, these tend to have a Less Severe expression

  • Chronic Trouble Sleeping
  • Dry Mouth
  • Nervous
  • Taste Problems

INFREQUENT side effects


If experienced, these tend to have a Severe expression

  • Abnormal Heart Rhythm
  • Hives
  • Inflammation Of Skin Caused By An Allergy
  • Rash

If experienced, these tend to have a Less Severe expression

  • Altered Interest In Having Sexual Intercourse
  • Blurred Vision
  • Constipation
  • Diarrhea
  • Difficult Or Painful Urination
  • Dizzy
  • Extreme Sense Of Well Being
  • Fast Heartbeat
  • Feeling Agitated
  • Head Pain
  • Heart Throbbing Or Pounding
  • Involuntary Quivering
  • Stomach Cramps
  • Temporary Redness Of Face And Neck

RARE side effects


If experienced, these tend to have a Severe expression

  • Confused
  • Disease Of Inadequate Blood Flow To The Heart Muscle
  • Heart Valve Disease
  • Increased Pressure Of Pulmonary Circulation
  • Psychosis Caused By A Drug

If experienced, these tend to have a Less Severe expression

  • Excessive Sweating
  • Feel Like Throwing Up
  • Feeling Unhappy Or Unwell
  • Frequent Urination
  • Inability To Have An Erection

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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.