Onion (Allii cepae bulbus)

Published March 13, 1986.
List of German Commission E Monographs (Phytotherapy)


Name of Drug

Allii cepae bulbus, onion.

Composition of Drug

Onion consists of the fresh or dried, thick and fleshy leaf sheaths and stipules of Allium cepa L. [Fam. Alliaceae], as well as their preparations in effective dosage.

It contains alliin and similar sulfur compounds, essential oil, peptides and flavonoids.


Loss of appetite, prevention of atherosclerosis.


None known.

Side Effects

None known.

Interactions with Other Drugs

None known.


Unless otherwise prescribed:

Average daily dosage:

50 g of fresh onions or 20 g of dried drug; equivalent preparations. Mode of Administration Cut onions, pressed juice from fresh onions and other oral galenical preparations.

Duration of Administration

Note: If onion preparations are used over several months, the daily maximum amount for diphenylamine is 0.035 g.


Lipid and blood pressure-lowering
Inhibition of thrombocyte aggregation.