Complex sentence: This is the same as the regulation of Donnagel PG some states, when it was available, it was a prescription drug because of the belladonna content; the stimulant pyrovalerone is another Schedule V but prescription-only drug.
Split into simpler sentences: This is the same as the regulation of Donnagel PG: in some states, when it was available, it was a prescription drug because of the belladonna content. The stimulant pyrovalerone is another Schedule V but prescription-only drug.