Cap: Patients taking contraceptive pills, neomycin, blood-thinning medications, laxatives, Ca supplements, thiazide diuretics, anticonvulsants, fluorouracil, levodopa, altretamine, aspirin, PPIs, H
2-receptor antagonists, colchicine, chloramphenicol, Fe supplements & chelating agents, Al antacids, oral citrate, analgesics, orlistat, bile acid sequestrants, alcohol, & CNS drugs. Syr: Vit B
1: Increased metabolism & blocked formation of thiamine pyrophosphate w/ fluorouracil which could further exacerbate preexisting thiamine deficiency in cancer patients. Vit B
6: Reduced effects of levodopa. High doses can decrease serum conc of phenytoin & phenobarb. Reduced effectiveness of altretamine (hexamethyl melamine). Vit B
12: Reduced gut absorption w/ aspirin, PPIs, H
2-receptor antagonists, neomycin, colchicine. May cause milder, reversible bone marrow depression w/ chloramphenicol. Vit C: Intestinal absorption may be reduced w/ aspirin. Bioavailability may be affected w/ PPIs. High doses may cause cardiac toxicity w/ deferoxamine in patients w/ Fe overload. May increase absorption of Fe in Fe-deficiency states & w/ other Fe chelating agents. May predispose patient to potentially fatal encephalopathy w/ Al antacids & oral citrate in patients w/ renal failure due to markedly increased blood Al levels. Prolonged presence of paracetamol in the blood. Interferes w/ blood-thinning treatments. Buclizine: May enhance sedative effect of nervous depressants including alcohol, barbiturates, hypnotics, narcotics, analgesic, sedatives, & tranquilizers.