Tetracyclines (Doxycycline, Minocycline, Sumycin)
Purpose of Medication and Method of Action
Doxycycline is a member of the tetracycline family of antibiotics. These antibiotics act by preventing the growth of a number of sensitive species of bacteria (bacteriostatic). They are used to treat many types of infections primarily those produced by gram negative infections such as hemophilus influenza. It is also used in acne to reduce bacterial flora on the skin which reduces the number of pustules. In lower doses, doxycycline is also used to treat periodontal disease.
Side Effects
The most common side effects are: loss of appetite, diarrhea, monilial infections of the mouth and anogenital region, photosensitivity requiring the use of sunscreens, rash, and an increase in blood urea nitrogen (a measure of kidney function).
Drug Interactions
se taking the anticoagulant Coumadin (warfarin) may require a lowered dose of the anticoagulant. Barbiturates such as phenobarbital, carbamazepine (Tegretol), and phenytoin (Dilantin) will decrease the blood level and effectiveness of doxycycline.
Cautions and Contraindications
Use with great caution in pregnancy and in nursing mothers!
Usual Dose
The usual dose is 100-500 mg each day in 1-2 doses. Do not take with antacids or bismuth preparations.
Patient Medication Information
These information sheets do not list all known side effects of the medications, only the most common side effects. For a complete list of side effects please contact your local pharmacy or the actual drug manufacturing company.