Ginger may interact with prescription and nonprescription medications. If you take any of the following medications, you should not use ginger without first talking to your doctor.
Blood-thinning medications: Ginger may increase the risk of bleeding. Talk to your doctor before taking ginger if you take blood-thinners such as warfarin (Coumadin), clopidogrel (Plavix), or aspirin.
Diabetes medications: Ginger may lower blood sugar. That can raise the risk of developing hypoglycemia or low blood sugar.
High blood pressure medications: Ginger may lower blood pressure, raising the risk of low blood pressure or irregular heartbeat.