All are Atropine substitutes except
Drotaverine (INN, also known as drotaverin) is an antispasmodic drug, used to enhance cervical dilation during childbih. It is structurally related to papaverine, is a selective inhibitor of phosphodiesterase 4, and has no anticholinergic effects. Ref - medscape.com
Procyclidine
Propantheline
Tiotropium
Drotaverin
All India exam