You should not receive this medicine if you have had an allergic reaction to doxycycline or to any tetracycline antibiotic (such as minocycline). You should not receive this medicine if you are in the last half of your pregnancy. Do not give this medicine to a child under 8 years old, because it can permanently change their teeth color.
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Birth control pills may not work while you are using doxycycline. To keep from getting pregnant, use one or more other forms of birth control such as condoms, a diaphragm, or contraceptive foam or jelly.
There may be other medicines that can interact with doxycycline. Make sure your doctor or dentist knows about all other medicines you are using.
Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away. If you are breast feeding a child, you may need to stop breast feeding for several days after receiving this medicine. Make sure your doctor or dentist knows if you are breast feeding.
Make sure your doctor or dentist knows if you have a history of thrush (oral candidiasis), which is a yeast infection of the mouth. Tell your doctor about any other medical problems you may have.
This medicine may make your skin more sensitive to sunlight. Use a sunscreen when you are outdoors. Avoid sunlamps and tanning beds.
Make sure any doctor or dentist who treats you knows that you have received this medicine. This medicine may affect the results of certain medical tests.