Common medication mistakes you should avoid
Not getting a medication schedule from your doctor

It's important your doctor knows all your prescriptions, OTCs, and supplements, in order to come up with an approved list for when to take each of them.
Not avoiding specific foods

Even if you take your meds with a meal, you may not realize you should avoid certain foods. For example, certain meds shouldn't be taken with calcium-containing food, as they will affect how they are absorbed by the body. Also, the metabolism of several medications, including statins, is affected by the enzymes in grapefruit juice.
Not knowing what your medication is for

You should know what each drug is for when you start taking it. Having an understanding of the condition that the med is being used to treat will help you see its importance.