Definition
Herbal drug preparation involves processing raw herbs into medicinal forms like powders, extracts, tinctures, and capsules while maintaining their therapeutic properties.
Common Methods of Herbal Drug Preparation

Infusions
Steeping leaves or flowers in hot water (e.g., Green tea, Chamomile tea).
Decoctions
Boiling harder plant parts like roots and bark (e.g., Ginger decoction).
Tinctures
Soaking herbs in alcohol to extract compounds (e.g., Echinacea tincture).
Extracts
Concentrating herbal components using solvents like water, ethanol, or glycerin.
Ointments & Creams
Herbal oils mixed with wax or base for skin application (e.g., Calendula cream).