Reduced absorption of penicillamine, tetracycline. Impaired bioavailability of fluoroquinolones, levodopa, carbidopa, thyroxine, bisphosphonates. Reduced absorption by antacids. Interfered metabolism by co-trimoxazole, chloramphenicol,
sulphasalazine, aminopterin, methotrexate, pyrimethamine or sulphonamides. Reduced serum levels of anticonvulsants. Delayed plasma clearance by oral chloramphenicol. Inhibition of absorption w/ cholestyramine, trientine, tea, eggs or
milk. Increased BP w/ methyldopa. Reduced bioavailability w/ coffee. Altered absorption w/ neomycin.