para-aminosalicylic acid · Medicine question

Why should diphenhydramine not be taken with para-aminosalicylic acid?

Name: Why should diphenhydramine not be taken with para-aminosalicylic acid?
Published: 2026-11-08T01:58:57.496Z

iatroX medicinesPublished 8 November 2026

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Diphenhydramine should not be taken concomitantly with para-aminosalicylic acid because it decreases the gastrointestinal absorption of para-aminosalicylic acid.

Sources for this answer

GranupasEurocept International bv · emc · SmPC §4.5 Interaction with other medicinal products · Version 1Document updated 4 June 2020

Sources checked 8 November 2026

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