Contact your doctor or pharmacist immediately. They can assess the situation and provide personalized advice.
Don’t panic. While taking calcium with doxycycline reduces its effectiveness, it’s not usually a medical emergency. The severity depends on the amount of calcium consumed and the dosage of doxycycline.
Be prepared to provide the following information:
| Type of calcium supplement | E. g., calcium carbonate, calcium citrate |
| Dosage of calcium supplement | Amount taken in milligrams (mg) |
| Dosage of doxycycline | Amount taken in milligrams (mg) |
| Time elapsed since taking both medications | Minutes or hours |
| Any symptoms you’re experiencing | E. g., stomach upset, nausea |
Your doctor may recommend adjusting your doxycycline dosage or schedule or suggest strategies to minimize the interaction in the future. Follow their instructions carefully.
Avoid taking calcium supplements within several hours of taking doxycycline. Check food and beverage labels – many fortified products contain significant calcium.
