I dont see any thing the matter with medication. Just like a diabetic person can not make insulin from their pancreas. An ADD person does not make enough dopamine in their brains to carry signals.
Medication of course needs to be prescribed my a medical Doctor and you should never take other peoples drugs.
There are a lot of variables, dosage, type of ADD, diet, lifestyle, history.
I know this sounds weird but up 10% of people have it.
And with treatment,I got tested and my coding started to become more in depth.
My concentration is more then i can ever imagine. Before I would work 30mins 30 mins(a life hack I got from HN previously) off like a previous. Now I can work 2 hours straight with even better results from what I would do in 4 30 min work sessions.