Acamprosate Calcium Recall
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FDA Labeling Changes
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Acamprosate calcium delayed-release tablets are indicated for the maintenance of abstinence from alcohol in patients with alcohol dependence who are abstinent at treatment initiation. Treatment with acamprosate calcium delayed-release tablets should be part of a comprehensive management program that includes psychosocial support.
The efficacy of acamprosate calcium delayed-release tablets in promoting abstinence has not been demonstrated in subjects who have not undergone detoxification and not achieved alcohol abstinence prior to beginning acamprosate calcium delayed-release tablets treatment. The efficacy of acamprosate calcium delayed-release tablets in promoting abstinence from alcohol in polysubstance abusers has not been adequately assessed.
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Acamprosate calcium delayed-release tablets are supplied as an enteric-coated tablet for oral administration. Acamprosate calcium is a synthetic compound with a chemical structure similar to that of the endogenous amino acid homotaurine, which is a structural analogue of the amino acid neurotransmitter γ-aminobutyric acid and the amino acid neuromodulator taurine. Its chemical name is calcium bis [3-(acetylamino) propane-1-sulfonate]. Its chemical formula is C10H20CaN2O8S2 and molecular weight is 400.5. Its structural formula is:
Acamprosate calcium is a white to almost white powder, odorless or nearly odorless powder. It is freely soluble in water and practically insoluble in alcohol and methylene chloride.
Each acamprosate calcium delayed-release tablet contains acamprosate calcium 333 mg, equivalent to 300 mg of acamprosate. Inactive ingredients in acamprosate calcium delayed-release tablets include: colloidal silicon dioxide, crospovidone, methacrylic acid copolymer dispersion, magnesium silicate, magnesium stearate, microcrystalline cellulose, polyvinyl pyrollidone, propylene glycol, sodium starch glycolate, and talc. Sulfites were used in the synthesis of the drug substance and traces of residual sulfites may be present in the drug product.