<unk>  (INN, also known as<unk>  is an antispasmodic drug, used to enhance cervical dilation during childbirth. It is structurally related to papaverine, is a selective inhibitor of phosphodiesterase 4, and has no anticholinergic effects. It is available in Asian and Central and Eastern European countries under several brand names. Most known brand is No-Spa by Hungarian plant Chinoin (owned by Sanofi). An article from 2013 described the effects from overdose (in a 19-year-old woman) as including vomiting, seizures and fatal cardiac toxicity. In 2016, the young Russian chess player Ivan Bukavshin died of a massive overdose (or poisoning) of the drug, which was originally thought to be a stroke. His doses was 17 mg/kg in the blood stream.
Drotaverine
Denaverine
Pentoxyverine
Brodifacoum
Amylin
Fomepizole
Fermagate
Sodium azide