My elder sister (55 years old, 5" 5' in height, 37 kg) cannot take any sort of allopathic medicines. If she does, she suffers from nausea & headache. She does not suffer from any other disease but is very frail. She cannot eat anything but simple foods. Perhaps she has GERD. Can you tell me what can be reason for her not being able to take any medicine, even vitamins?