Herb Pharm prepares their Cramp Bark extract from the bark of responsibly wildcrafted Viburnum opulus trees in Kentucky. The bark is hand-harvested in the spring or fall, carefully shade-dried, then thoroughly extracted.

The herb is extracted in small batches with Certified Organic cane alcohol for potency and to maintain the balance of phytochemicals as they exist in the plant. Herb Pharm assures herb identity via macroscopic and organoleptic analysis, then confirms it through methods such as HPTLC fingerprinting specific to each herb. The formula is easily dispensed, taken in liquid form and added to water or other liquid.