Let’s start with the basics
Each medicinal substance (when we are talking about drugs) or nutritional (when we are talking about food supplements) must be in a pharmaceutical form so that it can be administered by an appropriate route, e.g. orally, parenterally or into the eye. A pharmaceutical form needs i.e. a certain type of a carrier for a given substance, for example, a tablet, a hard capsule (those that can be opened), a soft capsule (e.g. with oils), a suppository, eye drops, ear drops, solution for injection, suspension for subcutaneous administration, submicron emulsion and liposomes.