What are the possible side effects of Elder (Sambucas nigra L.)?
Elderberry products should be used under the direction of a qualified healthcare provider because of the possible risk of cyanide toxicity, especially from elder bark, root, or leaves. There are reports of gastrointestinal distress, diarrhea, vomiting, abdominal cramps, and weakness after drinking elderberry juice made from crushed leaves, stems and uncooked elderberries. Notably, the berries must be cooked to prevent nausea or cyanide toxicity. Allergies are possible from fresh elder stems and may include rash, skin irritation, or difficulty breathing. In theory, high doses or long-term use of elder flowers may have diuretic (urine-producing) effects. People taking diuretics or drugs that interact with diuretics should use caution when taking products containing elder.
