Thanks for your question.
Spasmo proxyon tablet contains three Acetaminophene,Dicyclomine
Acetaminophene ia analgesic
Dicyclomine is anti spasmodic and propoxyphene is mild narcotic
This medicine is used to treat many types of pain abdomen including dysmenorrhea (painful menstruation
Some people become addict to it due to propoxyphene,which is narcotic.
Pain abdomen before and during periods is normal physiological process and that is why pain killer are used during periods.
Becoming senseless is also normal, it is called as premenstrual tension, it starts few days before periods and may persists during period.
Hope this answer your question