What is the best medication prescribed for add/adhd?

No one med: By far the stimulant class of medications have proved safe and effective. Today we have lots of choices in stimulants, some tend to have different side effects, or may be slow release or have different peaks. Mainly restlessness, impulsiveness, attention and cognitive tasks respond at different levels so the blood concentration curves are relevant. For some other types of meds may be used.

The one that works: best without intolerable side effects for each individual patient. The 2 stimulants, amphetamine & methylphenidate, work about equally as well. Long-acting preparations make life easier for most patients. Some need to add a non-stimulant like atomoxetine or 24-hour-release guanfacine or clonodine. Some can only tolerate a non-stimulant. Doctor-patient communication is the key to success.