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Acamprosate Side Effects

Medically reviewed by Last updated on Apr 21, 2023.

Applies to acamprosate: oral tablet delayed release.

Serious side effects of Acamprosate

Along with its needed effects, acamprosate may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking acamprosate:

More common

Symptoms of Overdose

Get emergency help immediately if any of the following symptoms of overdose occur while taking acamprosate:

Other side effects of Acamprosate

Some side effects of acamprosate may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More Common

Less common

For Healthcare Professionals

Applies to acamprosate: oral delayed release tablet.


The most commonly reported side effects included diarrhea, insomnia, anxiety, depression, and asthenia.[Ref]


Very common (10% or more): Diarrhea (up to 17%)

Common (1% to 10%): Abdominal pain, constipation, dry mouth, dyspepsia, flatulence, nausea, vomiting

Uncommon (0.1% to 1%): Dysphagia, eructation, esophagitis, gastritis, gastroenteritis, gastrointestinal hemorrhage, hematemesis, nausea and vomiting, pancreatitis, rectal hemorrhage

Rare (0.01% to 0.1%): Abdomen enlarged, ascites, cholecystitis, colitis, duodenal ulcer, increased salivation, melena, mouth ulceration, stomach ulcer[Ref]

Nervous system

Common (1% to 10%): Amnesia, dizziness, headache, paresthesia, somnolence, syncope, taste perversion, tremor

Uncommon (0.1% to 1%): Convulsion, hypesthesia, migraine, neuralgia, vertigo

Rare (0.01% to 0.1%): Encephalopathy, hyperkinesia, twitching[Ref]


Common (1% to 10%): Abnormal thinking, anxiety, depression, insomnia, libido decreased, suicide attempt

Uncommon (0.1% to 1%): Abnormal dreams, agitation, apathy, confusion, hallucinations, hostility, intentional injury, intentional overdose, libido increased, neurosis, suicidal ideation, withdrawal syndrome

Rare (0.01% to 0.1%): Alcohol craving, depersonalization, manic reaction, paranoid reaction, psychosis

Frequency not reported: Nervousness[Ref]


Common (1% to 10%): Chest pain, hypertension, palpitations, peripheral edema, vasodilation

Uncommon (0.1% to 1%): Angina pectoris, hemorrhage, hypotension, myocardial infarct, phlebitis, postural hypotension, tachycardia, varicose vein

Rare (0.01% to 0.1%): Cardiomyopathy, deep thrombophlebitis, heart failure, mesenteric arterial occlusion, shock[Ref]


Common (1% to 10%): Bronchitis, cough increased, dyspnea, pharyngitis, rhinitis

Uncommon (0.1% to 1%): Asthma, epistaxis, pneumonia

Rare (0.01% to 0.1%): Laryngismus, pulmonary embolus[Ref]


Common (1% to 10%): Pruritus, maculopapular rash, rash, sweating

Uncommon (0.1% to 1%): Acne, alopecia, dry skin, ecchymosis, eczema, exfoliative dermatitis, urticaria, vesiculobullous rash/vesiculobullous eruptions

Rare (0.01% to 0.1%): Face edema, photosensitivity reaction, psoriasis[Ref]


Common (1% to 10%): Accidental injury, asthenia, chills, pain

Uncommon (0.1% to 1%): Deafness, fever, hernia, malaise, tinnitus

Rare (0.01% to 0.1%): Sudden death[Ref]


Common (1% to 10%): Anorexia, increased appetite, weight gain

Uncommon (0.1% to 1%): Avitaminosis, diabetes mellitus, gout, hyperglycemia, hyperuricemia, thirst, weight loss

Rare (0.01% to 0.1%): Hyponatremia, lactic dehydrogenase increased[Ref]


Common (1% to 10%): Arthralgia, back pain, myalgia

Uncommon (0.1% to 1%): Leg cramps, neck pain

Rare (0.01% to 0.1%): Myopathy, rheumatoid arthritis, torticollis

Frequency not reported: Fracture[Ref]


Common (1% to 10%): Frigidity, impotence

Uncommon (0.1% to 1%): Metrorrhagia, sexual function abnormal, urinary frequency, urinary incontinence, urinary tract infection, vaginitis

Rare (0.01% to 0.1%): Abnormal ejaculation, hematuria, menorrhagia, nocturia, polyuria, urinary urgency[Ref]


Common (1% to 10%): Flu syndrome, infection

Uncommon (0.1% to 1%): Abscess[Ref]


Common (1% to 10%): Abnormal vision

Uncommon (0.1% to 1%): Amblyopia

Rare (0.01% to 0.1%): Diplopia, ophthalmitis, photophobia[Ref]


Uncommon (0.1% to 1%): ALT increased, AST increased, bilirubinemia, hepatitis, liver cirrhosis, liver function tests abnormal

Rare (0.01% to 0.1%): Alkaline phosphatase increased[Ref]


Uncommon (0.1% to 1%): Anemia, eosinophilia, lymphocytosis, thrombocytopenia

Rare (0.01% to 0.1%): Leukopenia, lymphadenopathy, monocytosis[Ref]


Uncommon (0.1% to 1%): Allergic reaction

Very rare (less than 0.01%): Anaphylactic reactions, angioedema, hypersensitivity reactions[Ref]


Rare (0.01% to 0.1%): Creatinine increased, kidney calculus

Postmarketing reports: Acute kidney failure[Ref]

Acute kidney failure was reported in 3 patients and was temporally associated with treatment.[Ref]


Rare (0.01% to 0.1%): Goiter, hypothyroidism[Ref]


Rare (0.01% to 0.1%): Carcinoma of liver[Ref]

Frequently asked questions


1. Product Information. Campral (acamprosate). Forest Pharmaceuticals. 2004.

2. Cerner Multum, Inc. UK Summary of Product Characteristics.

3. Cerner Multum, Inc. Australian Product Information.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.