Cramp Bark

At a Glance

Common name

Cramp Bark

Scientific name

Viburnum opulus

Family

Adoxaceae

Region

North America

Plant part

Bark

Caffeine

Caffeine Free

Evidence

Insufficient

Safety review

Safety information on file

Botanical Description

A deciduous shrub with broad three-lobed toothed maple-like leaves, flat clusters of small white flowers ringed by larger sterile outer blooms, and clusters of bright red berries; the grey-brown bark is the part used.

Also known as: Guelder Rose, High Bush Cranberry, Snowball Tree

Historical Background

Cramp bark (guelder rose) has been used by Native American peoples and early American Eclectic physicians for centuries for muscle and menstrual comfort. Its grey-brown bark is decocted into a tea traditionally sipped for occasional cramping and tension.

Earliest recorded uses: Native American and early American Eclectic medicine for centuries; named for its traditional use for muscle and menstrual cramping.

Traditional Uses

These uses document historical traditions and do not imply proven effectiveness.

Flavor & Aroma

Aroma: Earthy, slightly bitter, woody

Tea Preparation

Modern Evidence

Cramp bark has a tradition for muscle and menstrual comfort. Clinical evidence is insufficient; preclinical work suggests possible smooth-muscle relaxant activity, but it is not a treatment for dysmenorrhea, muscle spasm, or any condition, and should be discussed with a clinician.

Evidence levels describe the state of research for the traditional use discussed here, not a recommendation. Historical use does not imply effectiveness.