Ginger is a natural blood thinner and reduces blood pressure; it also regulates blood sugar (1). Taken together with medication that is designed to do the same can mean too much of a good thing. Hence, ginger should not be taken with anticoagulants, beta blockers, aspirin, or insulin.
A list of drugs known to negatively interact with ginger can be found here.
3. Pregnancy
Ginger root tea in early pregnancy has been found to relieve nausea and vomiting. After the first trimester, however, ginger root should be taken infrequently in very small doses (if at all) because it can induce uterine contractions (2). This, in turn, may result in premature delivery or miscarriage.
On the other hand, it can be usedful when your delivery date has passed and you’re ready to meet your little one face to face.
4. Being UnderweightGinger stimulates digestion, which is why it is so effective against an upset stomach and other gastrointestinal issues. If you are significantly underweight, you want to slow digestion and absorb as many nutrients as you can from the food you eat.
High fiber content in ginger root moves foods through the digestive system and other compounds in the root can raise metabolism and promote weight loss.