Galantamine Side Effects

Not all side effects for galantamine may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

For the Consumer

Applies to galantamine: oral capsule extended release, oral solution, oral tablet

In addition to its needed effects, some unwanted effects may be caused by galantamine. In the event that any of these side effects do occur, they may require medical attention.

You should check with your doctor immediately if any of these side effects occur when taking galantamine:

Less common
  • Chest pain or discomfort
  • lightheadedness, dizziness, or fainting
  • shakiness in the legs, arms, hands, or feet
  • shortness of breath
  • slow or irregular heartbeat
  • unusual tiredness
Rare
  • Blurred vision
  • confusion
  • decreased urination
  • dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  • dry mouth
  • fainting
  • fast, irregular, pounding, or racing heartbeat or pulse
  • feeling of warmth
  • rapid breathing
  • redness of the face, neck, arms, and occasionally, upper chest
  • sunken eyes
  • sweating
  • thirst
  • troubled breathing
  • unusual tiredness or weakness
  • wrinkled skin
Incidence not known
  • Dark urine
  • fever
  • general tiredness and weakness
  • headache
  • hoarseness
  • irritation
  • joint pain, stiffness, or swelling
  • light-colored stools
  • nausea and vomiting
  • nervousness
  • pounding in the ears
  • rash, hives, or itching skin
  • redness of the skin
  • swelling of the eyelids, face, lips, hands, or feet
  • tightness in the chest
  • troubled swallowing
  • upper right abdominal or stomach pain
  • yellow eyes and skin

If any of the following symptoms of overdose occur while taking galantamine, get emergency help immediately:

Symptoms of overdose
  • Confusion
  • convulsions
  • irregular, fast or slow, or shallow breathing
  • muscle weakness
  • pale or blue lips, fingernails, or skin
  • severe nausea
  • stomach cramps
  • sweating
  • tearing of the eyes
  • twitches of the muscle visible under the skin
  • vomiting

Some of the side effects that can occur with galantamine may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

More common
  • Decreased appetite
  • diarrhea
  • weight loss
Less common
  • Acid or sour stomach
  • belching
  • discouragement
  • feeling sad or empty
  • general feeling of discomfort or illness
  • heartburn
  • increased sweating
  • indigestion
  • irritability
  • lack of appetite
  • lack or loss of strength
  • loss of interest or pleasure
  • muscle spasms
  • stomach discomfort, upset, or pain
  • trouble concentrating
  • trouble sleeping
  • unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
Rare
  • Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  • change in taste
  • dry heaves
  • loss of taste
  • unusually deep sleep
  • unusually long duration of sleep
Incidence not known
  • Continuing ringing or buzzing or other unexplained noise in the ears
  • hearing loss
  • seeing, hearing, or feeling things that are not there

For Healthcare Professionals

Applies to galantamine: oral capsule extended release, oral solution, oral tablet

Cardiovascular

Common (1% to 10%): Bradycardia
Uncommon (0.1% to 1%): First degree atrioventricular block, palpitations, sinus bradycardia, supraventricular extrasystoles, flushing, hypotension
Frequency not reported: Postural hypotension, dependent edema, cardiac failure, myocardial ischemia or infarction, atrial arrhythmias including atrial fibrillation and supraventricular tachycardia, QT prolonged, bundle branch block, T-wave inversion, chest pain and ventricular tachycardia
Postmarketing reports: Hypertension

Dermatologic

Common (1% to 10%): Hyperhidrosis

Gastrointestinal

Very common (10% or more): Nausea, vomiting
Common (1% to 10%): Diarrhea, abdominal pain, upper abdominal pain, dyspepsia, stomach discomfort, abdominal discomfort
Uncommon (0.1% to 1%): Retching
Postmarketing reports: Upper and lower GI bleeding, stomach discomfort, and abdominal discomfort.

General

The most common side effects associated with discontinuation were nausea, vomiting, decreased appetite, dizziness, diarrhea, headache, decreased weight, and abdominal pain.

Genitourinary

Common (1% to 10%): Urinary tract infection, hematuria
Frequency not reported: Increased libido

Hematologic

Common (1% to 10%): Anemia

Hepatic

Postmarketing reports: Hepatitis, increased hepatic enzymes

Hypersensitivity

Postmarketing reports: Hypersensitivity

Metabolic

Common (1% to 10%): Decreased appetite, decreased weight, anorexia
Uncommon (0.1% to 1%): Dehydration

Musculoskeletal

Common (1% to 10%): Muscle spasms
Uncommon (0.1% to 1%): Muscular weakness

Nervous system

Common (1% to 10%): Dizziness, headache, tremor, syncope, lethargy, somnolence
Uncommon (0.1% to 1%): Dysgeusia, hypersomnia, paresthesia
Frequency not reported: Insomnia, leg cramps, transient ischemic attacks, cerebrovascular accidents
Postmarketing reports: Tinnitus

Ocular

Uncommon (0.1% to 1%): Blurred vision

Other

Common (1% to 10%): Fatigue, asthenia, malaise
Uncommon (0.1% to 1%): Fall
Frequency not reported: Death in patients with mild cognitive impairment, fever

Psychiatric

Common (1% to 10%): Depression
Frequency not reported: Apathy, paranoia (disagreeable or terrifying dreams), paranoid reaction, increased libido, delirium, suicidal ideation and suicide
Postmarketing reports: Hallucination, visual hallucination, auditory hallucination

Respiratory

Common (1% to 10%): Rhinitis

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