PRECAUTIONS: See also Side Effects section.Before taking doxycycline, tell your doctor or pharmacist if you are allergic to it; or to other tetracyclines (such as minocycline); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.Before using this medication, tell your doctor or pharmacist your medical history, especially of: trouble swallowing, esophagus problems (such as hiatal hernia or reflux/heartburn).Before having surgery, tell your doctor or dentist that you are taking this medication.This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, tanning booths, and sunlamps. Use a sunscreen and wear protective clothing when outdoors.Children younger than 8 years may be more sensitive to the side effects of doxycycline, especially tooth discoloration. Tooth discoloration has also occurred in older children and young adults. Discuss the risks and benefits of this medication with the doctor.This medication is not recommended for use during pregnancy. It may harm an unborn baby. Consult your doctor for more details and to discuss using reliable forms of birth control while taking this medication.This drug passes into breast milk but is unlikely to harm a nursing infant. Consult your doctor before breast-feeding.
DRUG INTERACTIONS: See also How to Use section.Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.Some products that may interact with this drug include: retinoid medications taken by mouth (such as acitretin, isotretinoin), barbiturates (such as phenobarbital), "blood thinners" (such as warfarin), digoxin, penicillins, anti-seizure medications (such as carbamazepine, phenytoin), strontium, live bacterial vaccines.This medication may interfere with certain laboratory tests (including urine catecholamine levels), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
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