Drug Interactions between Calcidol and digitoxin

Ergocalciferol can increase the levels of calcium in your body. Since calcium can enhance the effects of digitoxin on the heart, using too much ergocalciferol can cause digitoxin toxicity and irregular heart rhythm. If your doctor prescribes these medications together, you may need a dose adjustment or more frequent blood tests to monitor calcium and digitoxin levels. You should use ergocalciferol exactly as directed and avoid large increases in your daily dietary calcium intake while using ergocalciferol. Contact your doctor if you experience symptoms that could indicate high blood calcium, such as weakness, fatigue, headache, drowsiness, dizziness, ringing in the ears, loss of appetite, nausea, vomiting, constipation, dry mouth, a metallic taste in the mouth, bone or muscle pain, incoordination, frequent urination, and weight loss. You should also seek medical attention if you experience symptoms of digitoxin toxicity such as nausea, vomiting, blurred vision, slow pulse, or irregular heartbeats. 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.

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