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Paser Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 2/23/2016

Paser (aminosalicylic acid) is an anti-tuberculosis drug used to treat tuberculosis in combination with other active agents. Paser is most commonly used in patients with Multi-drug Resistant TB (MDR-TB) or when isoniazid and rifampin use is not possible due to a combination of resistance and/or intolerance. Common side effects of Paser include nausea, vomiting, diarrhea, abdominal pain, and allergic reactions including fever and itching.

The adult dosage of Paser is four grams (one packet), three times per day. Smaller doses should be given to children; consult your doctor for pediatric dosing. Paser may interact with other drugs. Tell your doctor all medications and supplements you use. Paser may decrease the amount of substances (such as vitamin B12) in your body. Your doctor may recommend you take supplemental B12 while taking this drug. During pregnancy, Paser should be used only if prescribed. Consult your doctor before breastfeeding.

Our Paser (aminosalicylic acid) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Paser FDA Prescribing Information: Side Effects
(Adverse Reactions)


The most common side effect is gastrointestinal intolerance manifested by nausea, vomiting, diarrhea, and abdominal pain.

Hypersensitivity reactions: Fever, skin eruptions of various types, including exfoliative dermatitis, infectious mononucleosis-like, or lymphoma-like syndrome, leucopenia, agranulocytosis, thrombocytopenia, Coombs' positive hemolytic anemia, jaundice, hepatitis, pericarditis, hypoglycemia, optic neuritis, encephalopathy, Leoffler's syndrome, and vasculitis and a reduction in prothrombin.

Crystalluria may be prevented by the maintenance of urine at a neutral or an alkaline pH.

Read the entire FDA prescribing information for Paser (Aminosalicylic Acid)

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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