para-aminosalicylic acid

chemical compound

Also known as: PAS, aminosalicylic acid

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July 1, 2026

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Para-aminosalicylic acid (PAS) is a white, crystalline chemical compound first synthesized in 1946. It is a para-substituted isomer of aminosalicylic acid. PAS is used in the treatment of tuberculosis. Aminosalicylic acid refers to any of four isomeric derivatives of salicylic acid that contain a single amino group, with PAS being a particularly notable example.12

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Crohn disease
drugs, including corticosteroids and aminosalicylic acid compounds, are used to treat Crohn disease. The drugs are effective both in treating acute episodes and in suppressing the disease over the long term. Depending on the circumstances, hematinics, vitamins, high-protein diets, and blood transfusions are also used. Surgical resection of the…
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drugs, including corticosteroids and aminosalicylic acid compounds, are used to treat Crohn disease. The drugs are effective both in treating acute episodes and in suppressing the disease over the long term. Depending on the circumstances, hematinics, vitamins, high-protein diets, and blood transfusions are also used. Surgical resection of the…
Read More

history of medicine
Antituberculous drugs
…the two most important being para-aminosalicylic acid (PAS) and isoniazid. With a combination of two or more of these preparations, the outlook in tuberculosis improved immeasurably. The disease was not conquered, but it was brought well under control.
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…the two most important being para-aminosalicylic acid (PAS) and isoniazid. With a combination of two or more of these preparations, the outlook in tuberculosis improved immeasurably. The disease was not conquered, but it was brought well under control.
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