International Nonproprietary Name (INN): Drotaverine
Pharmaceutic group: Antispasmodic
Tablets 40 mg n20, n50 and n100.
Available without prescriptionQuestion?
THERE ARE CONTRAINDICATIONS. CAREFULLY READ THE INSTRUCTIONS FOR USE, OR OBTAIN A SPECIALIST ADVICE
Drotaverine (INN, also known as drotaverin) is an antispasmodic drug, structurally related to papaverine. Drotaverine is a selective inhibitor of phosphodiesterase 4, and has no anticholinergic effects. Drotaverine has been shown to possess dose-dependant analgesic effects in animal models. One small study has shown drotaverine to be eliminated mainly non-renally.
A few small 2003 studies found drotaverine to be nearly 80% effective in treating renal colic. It has also been studied in accelerating labor by speeding up cervical dilation, but the results have been conflicting. Drotaverine has been shown to be effective in paracervical block in managing pain during hysteroscopy and endometrial biopsy when administered together with mefenamic acid. Irritable bowel syndrome patients presenting with predominant diarrhea are more likely to benefit from Buscopan. Drotaverin has also been tested in combination with rimantadine for antiviral activity against A and B type influenza. Drotaverin has an adverse effects frequency of 0.9%, side effects being relatively uncommon.
Drotaverine is sold under brand name No-Spa (Chinoin Pharmaceutical and Chemical Works, Hungary, a member of the Sanofi-Aventis). It was concluded that drotaverine is highly effective in reducing the duration of active phase of labour by hastening cervical dilatation, more effective when given in more dilated cervix than with less dilatation and more effective in multigravida than in primigravida. There was no interference with uterine contractility and no increase in operative delivery. It reduces the incidence of traumatic postpartum haemorrhage by reducing the incidence of cervical tear. It is a safe drug for the mother as well as for the baby.