To achieve a suitable concentration of the active ingredients contained in the plants and that their action can be more effective, it is necessary to perform several procedures through which are extracted the active ingredients with the adequate solvents, selected according to the solubility and stability of the beneficial substances.
Extraction methods allow to obtain products in pharmaceutical forms suitable for oral or external dosage according to the place of action recommended.
These preparations are known as: decoctions, infusions, fluid extracts, dense or dry (according to their content of liquids) and tinctures.
They are also known as galenic formulations, in honor to Claudius Galen the precursor of preparing drugs from plants. Read the rest of this entry