My daughter started taking meds about 18 months ago, once she found the right one, she said it was like lifting the curtains on her brain.
My husband and I were very much against her taking them and she didn't want to take them either, but she eventually asked if she could trial it and see how it went, so we reluctantly agreed.
She was diagnosed with dyslexia at the same time as ADHD inattentive type, so we put her poor academic performance down to the dyslexia. However, the increase in her grades since she started the meds has been amazing, she really is reaching her potential.
She has tried several that either didn't work or she didn't like the side effects of, (Focalin, Ritalin, Ritalin XR, Vyvance). She eventually found Concerta worked although it does cut her appetite totally during the day.
It really is trial and error and being followed by a very good psychiatrist who can support them through finding the right medicine and the right dose.