B. Drug- Laboratory Test Interactions

1 Penicillin, Chloramphenicol, Vit. C, INH, Streptomycin - glucose in Urine ( Benedict’s test) - false (+) result 2. Chlordiazepoxide - thyroid function test (I 131) - False (-) result 3. Rifampicin ( red-orange), Vit. B2 ( intense yellow), Chloroquine (Brown) - urinalysis - change in color