 Two stimulants which are both prescribed for ADD/ADHD and narcolepsy; dexamphetamine and methylphenidate, are also List I drugs of the Opium Law.On the other hand, all barbiturates except for secobarbital are List II drugs, while none of them, except for phenobarbital, are prescribed today.In theory, a licensed doctor could prescribe any substance they think is needed for the correct treatment of their patient, both List I and List II substances of the Opium Law, though substances which aren't available as commercial pharmaceutical preparations have to be custom prepared by the designated pharmacy.