Drug Interaction Report

Using demeclocycline together with lithium may result in elevated levels of lithium in your body. You may need a dose adjustment or more frequent monitoring to safely use both medications. You should seek immediate medical attention if you experience any symptoms of a lithium toxicity such as drowsiness, dizziness, weakness, lack of muscle coordination, vomiting, diarrhea, thirst, blurry vision, ringing in the ears, tremor, increased urination and/or abnormal heart rhythm. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop any medications without first talking to your doctor.

Alcohol can increase the nervous system side effects of lithium such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with lithium. Do not use more than the recommended dose of lithium, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.

Do not take iron supplements, multivitamins, calcium supplements, antacids, or laxatives within 2 hours before or after taking demeclocycline. These products can make demeclocycline less effective in treating your infection. Do not take demeclocycline with milk or other dairy products, unless your doctor has told you to. Dairy products can make it harder for your body to absorb the medication.

Iron can bind to demeclocycline in the gastrointestinal tract, which may prevent their absorption into the bloodstream and possibly reduce their effectiveness. To avoid or minimize the interaction, iron-containing medications and demeclocycline should preferably be taken at least three to four hours apart in most cases. Talk to your doctor if you have any questions or concerns, or if you have trouble separating the dosing times. Your doctor may be able to prescribe alternatives that do not interact. 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.

Using caffeine together with lithium may increase the effects of caffeine. Contact your doctor if you experience nausea, vomiting, diarrhea, drowsiness, muscle weakness, tremor, lack of coordination, blurred vision, or ringing in your ears. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. 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.