Hi Rosie,
I'm almost 73 and I take blood pressure and thyroid prescription meds. I have refused to take a bone building medicine and a chloresterol medicine because of cost. My husband is 80 and he takes blood pressure, diabetes, gout, chronic diarrhea, and 2 different eye drops for glaucoma. We both take a low dose aspirin and while it's not a prescription it is prescribed by our respective doctors. I also take vision vitamins - also not a prescription but recommended by my optometrist. Geeze, it sounds even worse when I write it all down. You didn't ask but our prescription drug bill is about $400 per month.
Yours is an interesting question.