Can tetracyclines come into conflict with other medications if taken at the same time?
– Yes. Tetracyclines may decrease the effectiveness of another antibiotic if taken simultaneously. Inform your doctor if you are currently doing so. This drug may also complicate the effectiveness of some antacids, anticoagulants, penicillin, and oral contraceptives. – It is also suggested that patients avoid taking tetracyclines within one to three hours of taking antacids, calcium supplements, and laxatives containing magnesium. This is because these drugs may prevent the proper absorption of tetracyclines from the digestive system into the blood stream.