It may damage developing teeth and cause permanent discoloration. Return to top Tetracycline should be taken exactly as prescribed by your doctor. Be sure to use the entire prescription. If you are taking a liquid form of the drug, shake well before using. Do not use outdated tetracycline.
Outdated tetracycline is highly toxic to the kidneys.
They will affect the absorption of the drug. Take tetracycline 1 hour before or 2 hours after meals. Foods, milk, and some other dairy products affect absorption of the drug. Tetracycline should be continued for at least 24 to 48 hours after your symptoms have subsided. Take it as soon as you remember.