Photodegradation of benzydamine: phototoxicity of an isolated photoproduct on erythrocytes.

Abstract:

:Benzydamine hydrochloride (Tantum, 1) is a photoallergic and phototoxic anti-inflammatory and analgesic agent. This drug is photolabile under aerobic and anaerobic conditions. Irradiation of a methanol solution of benzydamine under oxygen or argon at 300 nm affords 5-hydroxybenzydamine (2) and 2-beta-dimethylaminopropyl-1-benzylindalolin-3-one (3) as the main isolated and spectroscopically identified photoproducts. A radical intermediate was evidenced by thiobarbituric acid that was used as a radical sonde, as well as by the dimerization of cysteine. Erythrocyte lysis photosensitized by 1, 2, and 3 was investigated.

journal_name

J Pharm Sci

authors

Vargas F,Rivas C,Machado R,Sarabia Z

doi

10.1002/jps.2600820407

subject

Has Abstract

pub_date

1993-04-01 00:00:00

pages

371-2

issue

4

eissn

0022-3549

issn

1520-6017

pii

S0022-3549(15)49099-9

journal_volume

82

pub_type

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