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Can I use Capoten if I am taking lithium?

If you're taking lithium, you may not be able to take the blood pressure medicine Capoten (captopril), because the two medications may interact.

Taking both lithium and Capoten, an angiotensin-converting enzyme (ACE) inhibitor, can increase the levels of lithium in your body. Signs of lithium toxicity have been reported in people taking lithium and an ACE inhibitor. Signs of lithium toxicity include diarrhea, stomach pains, seizures and coma.

If your doctor has said you should take Capoten, he or she will monitor your blood lithium levels frequently. If you are also taking a diuretic (water pill), it may increase the risk of lithium toxicity.

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