Spasmonal Forte 120mg Hard Capsules Spasmonal Forte 120mg Hard Capsules provide relief from the pain of Irritable Bowel Syndome, painful diverticular disease of the colon & period pains. The active ingredient alverine citrate is an anti-spasmodic medicine which works by relaxing the muscles in the intestine & the uterus, thus helping to stop the pain you feel when the muscles become tense.