Few standardised preparations are available, and research has mainly studied alcoholic extracts and isolated compounds.

It may be obtained from the alcoholic extract of the residue from which the convallamarin has been removed with water.

Carmelite water is an alcoholic extract on the basis of lemon balm and other herbs.

Tinctures are alcoholic extracts of herbs, which are generally stronger than tisanes.

A tincture is typically an alcoholic extract of plant or animal material or solution.

One can get alcoholic extract of belladonna quite easily.

A double-blind trial conducted in 2011 suggested that an alcoholic extract of tulsi modulates immunity, thus promoting immune system function.

An alcoholic extract of the plant was found to contain daphnoretin, chrysophanol, myricitrime and rutin.

An alcoholic extract of the leaf was shown, in lab rats, to protect the liver from damage from certain poisons.

The alcoholic extract is more toxic than the water extract.