The anticholinergic effect of drugs such as tri- and tetracyclic antidepressants, antihistamines, antipsychotics, Quinidine, Amantadine, Disopiramide and other anticholinergics (such as Tiotropium, Ipratropium, compounds such as Atropine) can be strengthened by Hyoscine Butylbromide. Co-administration with Dopamine antagonists such as Metoclopramide will exert a mutually neutralizing effect on the gastrointestinal tract. The tachycardic effect of beta-adrenergic drugs will be amplified by Hyoscine Butylbromide.