Prepared extracts of European elder usually don’t lead to side effects. Uncooked or unripe elderberries, leaves, seeds, and other parts of the tree may cause nausea, vomiting, or severe diarrhea due to the presence of a cyanide-producing chemical.
European elder may interact with immunosuppressant drugs.
European elder should be avoided by those with autoimmune diseases. It should likely be avoided by people who are allergic to grass pollen. Talk to your doctor before using it if you are pregnant or breast-feeding. Contact your doctor if symptoms persist or worsen.
Before taking any new medications, including natural health products, speak to your physician, pharmacist, or other health care provider. Tell your health care provider about any natural health products you may be taking.