Buccal tablets are intended to be:

Chewing and swallowing buccal tablets would defeat their purpose, as this method involves digestion in the gastrointestinal tract rather than absorption through the oral mucosa. Buccal tablets are formulated to dissolve slowly and be absorbed in the mouth, not to be ingested whole.

While similar, dissolving a tablet under the tongue refers to sublingual administration, which is distinct from the buccal route. Sublingual tablets dissolve directly under the tongue for quick absorption, whereas buccal tablets are meant to be placed in the cheek area for absorption through the buccal mucosa.

Swallowing buccal tablets whole with water would render them ineffective, as they are designed to dissolve in the mouth and release the active ingredient for absorption through the mucosal membrane. This method negates the intended absorption pathway and delays the onset of action.