Salvia can be boughten legally as 'incense' at online headshops, or a local headshop. DXM is a chemical that can be found in certain medications, the one I've found it is easy to get is Robitusin Cough Extra Strength. Ritalin and Adderall are prescriptions for ADD, so if you know anyone that has ADD, ask em if you can buy some of them or something. Opium may be a tricky one to get, I actually have never boughten it myself, I've smoked it when it was laced with some bud, but thats about it.