question: My 90 yr old mom who weighs approx 85 lbs was recently taken off metholtrexate for arthritis. They took her off that because she is anemic. She was also on high blood pressure meds. This week she took her bp at a pharmacy and it was 97/35. She asked the pharmacist if that was possible and he said no and took it 3 times with the same reading. She went to her Dr. the next day and he reduced her high blood pressure meds. My question is how much of a guessing game is it to find the right dosage of medication for such a small body?