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. 2021 Sep 29;26(19):5905. doi: 10.3390/molecules26195905

Table 1.

Routes of drug administration.

Oral Swallowed by Mouth as a Tablet, Capsule, Lozenge, or Liquid
Buccal Held inside the cheek
Sub-lingual Placed below the tongue
Enteral Delivered directly into the stomach or intestine
Inhalable Breathed in through a tube or mask
Nasal Given into the nose by spray or pump
Ophthalmic Given into the eye by drops, gel, or ointment
Otic Given by drops into the ear
Rectal Inserted into the rectum
Vaginal Inserted into the vagina
Topical Applied to the skin
Transdermal Given through a patch placed on the skin
Infused Injected into a vein with an IV line and slowly dripped in over time
Intramuscular Injected into the muscle with a syringe
Intravenous Injected into a vein or an IV line
Subcutaneous Injected just under the skin