When used appropriately, side effects with acetaminophen are not common. The most serious side effect is liver damage due to large doses, chronic use or concomitant use with alcohol or other drugs that also damage the liver. Chronic alcohol use may also increase the risk of stomach bleeding. Other important side effects include:
Acetaminophen is excreted in breast milk in small quantities. However, acetaminophen use by the nursing mother appears to be safe. Medically reviewed by Eni Williams, PharmD Reference: FDA Prescribing Information
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