Overview of Elderberry
Botanical Name: Sambucus nigra
The flowers of elderberry are commonly used in herbal medicine. The berries are also used and commonly marketed for their anti-oxidant properties. Elderberry is sometimes called black elder.
- Gingivitis, a mouthwash or patch with elderberry / Centella asiatica / Echinacea pupurea may also be effective [1-4]
- Immune Stimulant and Flu [5-7]
Conflicting (Unclear):insufficient information
- Acute Viral Sinusitis, elderberry flower with gentian root / primula flower / sorrel herb / verbena herb 
- Constipation, elderberry with Pimpinella anisum / Foeniculum vulgare / Cassia augustifolia 
- Cardiovascular Disease in Post-Menopausal Women, no increase in anthocyanin compounds 
- Cholesterol and Triglycerides (affects), a higher concentration of elderberry may work 
- Stones in Urinary Tract 
No Clinical Research:All other conditions.
- Avoid or contact a licensed healthcare practitioner, if you are a diabetic as elderberry may be harmful.
- There is a risk of cyanide poisoning if the leaves, shoots, bark, roots, and young berries are ingested; symptoms may include dizziness, headache, convulsions, gastrointestinal distress, nausea, vomiting, diarrhea, and tachycardia.
- Only harvest fully ripe purple berries because younger berries are slightly toxic.
- Taking elderberry bark may stimulate hyperplasia of the small intestines.
- A protein from elderberry may be an allergen.
There is not enough research on the use of supplements containing elderberry during pregnancy and breast-feeding, so consult a licensed healthcare practitioner before use or avoid use. Elderberry may cause gastrointestinal upset in pregnant woman. [13-16]
Elderberry is not a "drug", the best doses have not been thoroughly established. Make sure to follow the specific product instructions and take as directed on the label, or consult a licensed healthcare practitioner before use. However, it was reported that 500mg/day of elderberry did not alter liver and kidney functions. 
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