Tetracyclines such as doxycyline, oxytetracycline, penicillin such as amoxicillin kill bacteria that cause infections. Mineral supplements inactivate certain antibiotics preventing them from being absorbed adequately. Take antibiotics one hour before or two hours after you take mineral supplements or eat meals. Remember not to use calcium fortified orange juice to swallow antibiotics. St John's Wort taken with tetracycline can make your skin sensitive to burning and ultraviolet absorption.
Phenytoin can lower the number and severity of seizures and stop one as it's happening.
Seizure medications deplete body of vitamin B6 and folate. Mixing prescription antidepressants with herbal can lead to an overabundance of serotonin. Symptoms include agitation, sweating, lightheadedness, dizziness, and headaches. Garlic can lower blood pressure, with medicine, making it too low. The other herbs listed require caution when used because they could either lower or raise blood pressure.