Para-aminosalicylic acid (PAS) desensitization review in a case of multidrug-resistant pulmonary tuberculosis [Case Study]
OBJECTIVE: Rapid desensitization to para-aminosalicylic acid (PAS) in a patient with previous hypersensitivity reaction and a review of published PAS desensitization protocols.
DESIGN: Composition and implementation of a short-course PAS desensitization protocol for a 34-year-old woman with multidrug-resistant (MDR) pulmonary tuberculosis, incorporating published experiences of PAS desensitization over the past 50 years.
RESULTS: We composed a protocol and successfully desensitized our patient to PAS (Paser granules). By starting with a low dose (50 mg), then doubling the PAS dose on each successive day, our patient was able to tolerate full dose in 1 week. No steroids were required and no adverse reactions were encountered. Previous published PAS desensitization protocols used starting doses of 10–500 mg, desensitization time ranges from 7 to 54 days and commonly used steroids or corticotropin.
CONCLUSION: Rapid desensitization to PAS can be successfully conducted within 1 week without the use of steroids or corticotropin. Given the limited number of drugs available for many patients with MDR-TB, desensitization to PAS is a valid alternative to drug discontinuation for patients with hypersensitivity reactions.
Document Type: Short Communication
Affiliations: 1: Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA 2: Indianapolis Allergy & Asthma Physicians, Indianapolis, Indiana, USA 3: Division of Allergy & Immunology, Mayo Clinic, Rochester, Minnesota, USA
Publication date: May 1, 2003
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