Terodiline 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 terodiline, is probably due to its anticholinergic and calcium antagonist activity. However, it also blocks IKr (Kv11.1) channels (see

hERG hERG (the human '' Ether-à-go-go''-Related Gene) is a gene () that codes for a protein known as Kv11.1, the alpha subunit of a potassium ion channel. This ion channel (sometimes simply denoted as 'hERG') is best known for its contribution to th ...

gene) so can pose a risk for torsades de pointes. This cardiotoxicity is concentration dependent.

References

Amines Muscarinic antagonists Tert-butyl compounds {{genito-urinary-drug-stub