Which of the following types of tablet is dissolved in the mouth?

Sustained release tablets are formulated to dissolve slowly over time after ingestion, allowing for a prolonged release of medication into the bloodstream. These tablets are intended for swallowing whole, not for dissolution in the mouth, which is a key distinction that makes them unsuitable for this question.

Effervescent tablets are designed to dissolve in water before ingestion, producing a fizzy solution that can be consumed. While they do dissolve, the process occurs in a liquid medium rather than directly in the mouth, making them different from lozenges that dissolve directly in the oral cavity.

Enteric coated tablets are designed to resist dissolution in the stomach, allowing them to dissolve only in the more alkaline environment of the intestines. This coating is beneficial for protecting the stomach lining or ensuring that the drug is released at the correct site within the digestive tract, which means they are not meant to dissolve in the mouth.