Honestly we all take so little medicine around here that what we take does get used up way before the expiration date. The only one I check once in a while is our bigger bottle of ibuprofen. So far it is still good
Part of my job is to keep the shelves of DH's pharmacy current. So, I don't just have to do the medicine cabinet, I have to check a zillion bottles at work too!
I don't have too much but I do check occasionally to see if it is still good. Antibiotic creams always expire before we use them up, but I keep on using them anyway.
We really don't have much medication around here that isn't prescription. Ibuprophen usually gets used up before it expires and that's all we usually have....this is a great idea though.