A health professional demonstrates how to offer<unk>  medication to a dummy.<unk>  of a liquid<unk>  is a route of administration where a substance is taken through the mouth. Per os abbreviated to P.O. is sometimes used as a direction for medication to be taken<unk> ly. Many medications are taken<unk> ly because they are intended to have a systemic effect, reaching different parts of the body via the bloodstream, for example.
Oral administration
Subcutaneous infusion
Nasal administration
Subcutaneous injection
Intraperitoneal injection
Intramuscular injection
Intravaginal administration
Transdermal spray