cramp bark

Cramp Bark

 Viburnum opulus – bark

Cramp Bark shows by it’s name the reputation it has as a relaxer of muscular tension and spasm. It is able to relax both skeletal muscle and smooth muscle.

It has two main areas of use. Firstly in muscular cramps and secondly in ovarian and uterine muscle problems such as painful cramps.

It has an astringent action where it helps with excessive blood loss in periods and bleeding associated with menopause.


Primary: spasmolytic, hypotensive, peripheral vasodilator.

Secondary: sedative (mild), astringent.


  • Relief of dysmenorrhoea, ovarian pain and leg cramps.

None known.

Professional supervision is suggested for pregnancy and lactation.

The analysis of contents below is a guide only, product specific data including expiry date is with the item in the shop.

Viburnum opulus 1:2. Each 1 ml contains 500mg of dry herb.

Liquid extract in 35% ethanol. Use 5 to 30 ml weekly.

Our clinic uses fluid extracts from Optimal Rx, Herbal Extract Company, Nutrition Care, Mediherb or Sunray Botanicals, in this order.

V. opulus and V. prunifolium are mainly used for cramps, including menstrual cramps and muscle cramping associated with arthritis. Also used by native Americans for swollen glands, mumps and eye disorders, and as a diuretic. Sedative action on the uterus.