adhd
"I have taken pretty much every type of medication for ADHD. Dextroamphetamine, by far, works best for me. While Adderall contains dextroamphetamine, the l-amphetamine and it gives me very bad anxiety. 



Dextroamphetamine helps me focus without causing extra anxiety, and I prefer the instant release, which allows me to fall asleep. Ritalin caused anxiety even worse than Adderall did. 



One thing I recommend is to take a day or two off every week or so. If not, your tolerance might build up and you might find the medication is not working. Also, you need to learn to pay attention to your bodies other signals telling you went to eat. You probably will not feel hungry and your stomach. This does not mean you don't need food, however."