Get our free Tetracycline coupon and be eligible to receive a discount. You can reduce your Tetracycline cost by up to 75% with our free Tetracycline discount card. Bring it to a participating pharmacy near you to save on your prescription medication.Tetracycline is an antibiotic that fights bacteria in the body. Tetracycline is used to treat many different bacterial infections, such as urinary tract infections, acne, gonorrhea, chlamydia, and others. Tetracycline may also be used for other purposes not listed in this medication guide.