Generic Name: belladonna alkaloids and phenobarbital Brand Names: Antispas, Antispasmodic, Barbidonna, Donnapine, Donnatal, Donnatal Extentabs, Elixiral, Hyosophen, Spasmolin
Phenobarbital is in a class of drugs called barbiturates. Phenobarbital depresses the activity of your brain and nervous system, causing relaxation.
Belladonna alkaloids produce many effects in the body, including relief from spasms of the gastrointestinal tract (stomach and intestines),
Both of these drugs have been around a long time. Be sure to get patient information from your physician and pharmacy. :)
Reference: PDR pocket guide 7th Edition