Guanfacine HCL ER Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Less Severe expression

  • Drowsiness
  • Dry Mouth
  • Inducing Of A Relaxed Easy State
  • Low Energy
  • Weight Gain

INFREQUENT side effects


If experienced, these tend to have a Less Severe expression

  • Abnormally Low Blood Pressure
  • Altered Interest In Having Sexual Intercourse
  • Chronic Trouble Sleeping
  • Confused
  • Constipation
  • Dizzy
  • Easily Angered Or Annoyed
  • Feel Like Throwing Up
  • Feeling Weak
  • Frequent Urination
  • Head Pain
  • Heart Throbbing Or Pounding
  • Inability To Have An Erection
  • Indigestion
  • Loss Of Appetite
  • Nightmares
  • Problems With Bladder Control
  • Sluggishness
  • Throwing Up

RARE side effects


If experienced, these tend to have a Severe expression

  • Abnormal Functioning Of The Sinus Node Of The Heart
  • Atrioventricular Heart Block
  • Chest Pain
  • Disorder Of The Brain
  • Fast Heartbeat
  • Having Thoughts Of Suicide
  • Hypersensitivity Drug Reaction
  • Seizures
  • Skin Rash With Sloughing
  • Slow Heartbeat
  • Suicidal

If experienced, these tend to have a Less Severe expression

  • Blurred Vision
  • Depression
  • Feeling Anxious
  • Feeling Faint
  • Hair Loss
  • Hallucination
  • Intense Abdominal Pain
  • Involuntary Quivering
  • Itching
  • Joint Pain
  • Leg Cramps
  • Loss Of Skin Color
  • Muscle Pain
  • Not Feeling Well
  • Numbness And Tingling
  • Occasional Numbness, Prickling, Or Tingling Of Fingers And Toes
  • Pink Eye
  • Rash
  • Sensation Of Spinning Or Whirling
  • Skin Inflammation
  • Taste Problems
  • Trouble Breathing
  • Visible Water Retention

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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.