Try and suss out a good pharmacist who can give you time to go through things. Once you understand more it might leave you better informed to speak to your Dr.
I have great communication with my GP and we often discuss there reasons for and against medication rather than just a here's a prescription, take this kind of thing. I take a lot of different meds for different things and they come from different places, GP, consultants etc... so I try to keep a good check.
There is a fantastic pharmacist in a local Boots who is the most helpful one I've met, brilliant for working out if I can take over the counter remedies with my meds etc... and when I went to get a methotrexate prescription the other day I was quizzed on when my last blood tests were, did I know how much to take, how often, the dangers to look out for etc... Great to have someone like that.
Things can be overlooked and mistakes made. I had a GP make a mistake on issuing a prescription for me for 5mg daily of a drug and I ended up with 50mg.