You should not use tetracycline if you have ever had an allergic reaction to any tetracycline antibiotic (doxycycline, minocycline). Do not give this medicine to children under 8 years old because it can permanently change tooth color. You should not use this medicine if you are pregnant or breastfeeding.
Your doctor will tell you how much of this medicine to take and how often. Do not take more medicine or take it more often than your doctor tells you to.
It is best to take this medicine on an empty stomach, 1 hour before or 2 hours after a meal. Swallow the medicine with a full glass of water. You may take the medicine with food if it upsets your stomach.
Shake the oral liquid well just before each use. Measure the medicine with a marked measuring spoon or medicine cup.
Keep using this medicine for the full treatment time, even if you feel better after the first few doses. Your infection may not clear up if you stop using the medicine too soon.
If a dose is missed:
If you miss a dose or forget to take your medicine, take it as soon as you can. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose.
Do not use extra medicine to make up for a missed dose.
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are also using penicillin, antacids (such as Maalox®, Mylanta®), a blood thinner (Coumadin®), or multivitamins or mineral supplements that contain calcium or magnesium.
Avoid taking the medicine with milk or other dairy products.
Birth control pills, may not work while you are using tetracycline. To keep from getting pregnant, use another form of birth control such as condoms, a diaphragm, or contraceptive foam or jelly.