2. Herbal supplements
Natural remedies can have side effects, too, and sometimes they affect either your blood pressure or the way your blood pressure medication is working. Particular pills to watch out for include bitter orange (also called Seville orange or zhi shi), ephedra (ma-huang), ginseng, St. John’s wort, garlic, ginkgo, hawthorn and licorice root. If you’re being treated for hypertension, it’s important to let your doctor know which herbal supplements you’re taking.