I trust my doctor implicitly but I still look Mets up before I take them. Although I have an advantage here, because I'm a nurse. It's also important to check with your pharmacist to see if there are any interactions with other medications you take; because your doctor might have written a prescription in haste.
If there are drug interactions, they're often mild; however, you want to leave that up to the pharmacist to determine If they may affect you. Remember, the side effects you see on TV ads for a medication, are all the POTENTIAL side effects. You MUST be informed of them by law.