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Generic Name: Aminosalicylic Acid (a mee noe sal i SIL ik AS id)
Brand Name: Paser
Easy-to-read patient leaflet for Paser. Includes indications, proper use, special instructions, precautions, and possible side effects.
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Drug Information:
This is not a list of all drugs or health problems that interact with Paser (aminoSalicylic Acid). Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Paser (aminoSalicylic Acid) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor. Use Paser (aminoSalicylic Acid) as ordered by your doctor. Read all information given to you. Follow all instructions closely. Learn more

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Paser Side Effects

Note: This document contains side effect information about aminosalicylic acid. Some of the dosage forms listed on this page may not apply to the brand name Paser.

In Summary

More frequent side effects include: eosinophilia and leukocytosis. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to aminosalicylic acid: oral delayed-release granules

Side effects include:

GI effects (nausea, vomiting, abdominal pain, diarrhea).

For Healthcare Professionals

Applies to aminosalicylic acid: compounding powder, oral granule enteric coated


Gastrointestinal intolerance was manifested by abdominal pain, diarrhea, nausea, and vomiting.

Common (1% to 10%): Abdominal pain, bloating, diarrhea, gastrointestinal intolerance, nausea, soft stools, vomiting

Rare (0.01% to 0.1%): Gastrointestinal bleeding, malabsorption syndrome, peptic ulcer

Nervous system

Common (1% to 10%): Giddiness, vestibular syndrome

Rare (0.01% to 0.1%): Metallic taste

Very rare (less than 0.01%): Dizziness, headache, peripheral neuropathy

Frequency not reported: Encephalopathy, optic neuritis


Common (1% to 10%): Cutaneous hypersensitivity, skin rash

Rare (0.01% to 0.1%): Urticaria

Very rare (less than 0.01%): Purpura

Frequency not reported: Exfoliative dermatitis, skin eruptions of various types


Hypothyroidism most commonly occurred in patients with HIV, especially when this drug was given with ethionamide or prothionamide. When patients without HIV were given this drug, hypothyroidism rarely occurred.

Common (1% to 10%): Hypothyroidism


Uncommon (0.1% to 1%): Anorexia

Very rare (less than 0.01%): Hypoglycemia, weight loss


Rare (0.01% to 0.1%): Jaundice

Very rare (less than 0.01%): Hepatocytolysis, increased blood alkaline phosphatase, increased transaminases

Frequency not reported: Hepatitis

Patients should be closely monitored during the first three months of therapy and treatment must be discontinued immediately at the first signs of rash, fever, jaundice, or other sign of intolerance.


Very rare (less than 0.01%): Agranulocytosis, anemia, decreased prothrombin level, leukopenia, methemoglobinemia, thrombocytopenia

Frequency not reported: Coombs' positive hemolytic anemia, lymphoma-like syndrome


Very rare (less than 0.01%): Crystalluria


Very rare (less than 0.01%): Visual abnormalities


Very rare (less than 0.01%): Tendon pain


Frequency not reported: Pericarditis, vasculitis


Frequency not reported: Hypersensitivity reactions


Frequency not reported: Infectious mononucleosis-like skin eruptions


Frequency not reported: Loeffler's syndrome


Frequency not reported: Fever

Editorial References and Review

Medically reviewed by USARx EDITORIAL TEAM Last updated on 1/1/2020.

Source: Drugs.com Paser (www.drugs.com/cdi/paser.html).