Raspberry leaf tea can be made by adding 1 tsp of the leaf to one cup of boiling water. The leaf should be infused for 10 min and then strained. The infusion can be taken once or twice a day. During pregnancy, use 0.5 oz of leaf to one pt of boiling water and drink once a day. For infant diarrhea, dilute this infusion by 50%. A tincture made of raspbery leaf can be taken three times a day, in 2–4 ml doses.
Wilted raspberry leaves develop a mild poison that may make people ill. When picking the leaves for the tea, the user should make sure that the plant is flowering. Leaves used for steeping to make tea must be fully dried. Another important precaution is to be sure that the raspberries are not contaminated by a gastrointestinal parasite called Cyclospora. The parasite causes a disease called cyclosporiasis, which caused several serious outbreaks in the mid-1990s in the United States and Canada. The Cyclospora parasite was found in raspberries imported from Guatemala.
Although raspberry is used as an antidiarrheal herb, overuse may actually cause diarrhea. In addition, some people may be allergic to raspberries and other berries. Lastly, the tea may sometimes be too tonifying in the early stages of pregnancy; it should be discontinued if contractions increase.
No known adverse interactions with other medications have been reported.
Weiner, Michael. Weiner's Herbal. New York: Quantum Books, 1990.
Katherine Y. Kim, Rebecca J. Frey PhD, The Gale Group Inc., Gale, Detroit,