<unk>  is a drug used in urology as an antispasmodic.
It relaxes the smooth muscle and used to reduce bladder tone in treatment of urinary frequency and incontinence. Muscle relaxation caused by<unk> , is probably due to its anticholinergic and calcium antagonist activity.
However, it also blocks IKr (Kv11.1) channels (see hERG gene) so can pose a risk for torsades de pointes. This cardiotoxicity is concentration dependent.
Terodiline
Adenosine
Isoproterenol 
Iofendylate
Milrinone
Imolamine
Miltefosine
Angiotensinamide