Drug Interaction Report

Using minocycline together with isosorbide may result in reduced kidney function as well as changes in your electrolyte levels. The risk of this adverse reaction may be increased or decreased depending on the specific water pill and antibiotic combination as well as on your overall health status. Your doctor may already be aware of the interaction but has determined that this is the best course of treatment for you and is monitoring you closely for any potential complications. Contact your doctor immediately if you notice any signs or symptoms of kidney damage such as urinating less often, shortness of breath, fatigue, confusion, nausea, weakness, irregular heartbeat, chest pain or pressure, and/or swelling in your legs, ankles, or feet. Let your doctor know if you experience any side effects that are particularly bothersome. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Consumer information for this interaction is not currently available.

GENERALLY AVOID: The oral bioavailability of quinolone and tetracycline antibiotics may be reduced by concurrent administration of preparations containing polyvalent cations such as aluminum, calcium, iron, magnesium, and zinc. Therapeutic failure may result. The proposed mechanism is chelation of quinolone and tetracycline antibiotics by di- and trivalent cations, forming an insoluble complex that is poorly absorbed from the gastrointestinal tract. Reduced gastrointestinal absorption of the cations should also be considered.

MANAGEMENT: Concomitant administration of oral quinolone and tetracycline antibiotics with preparations containing aluminum, calcium, iron, magnesium, and/or zinc salts should generally be avoided. Otherwise, the times of administration should be staggered by as much as possible to minimize the potential for interaction. Quinolones should typically be dosed either 2 to 4 hours before or 4 to 6 hours after polyvalent cation preparations, depending on the quinolone and formulation. Likewise, tetracyclines and polyvalent cation preparations should typically be administered 2 to 4 hours apart. The prescribing information for the antibiotic should be consulted for more specific dosing recommendations.