Tablets are available in many different shapes and sizes. They are simple to manufacture and can keep for a long time. One or more active ingredients are combined with so-called excipients (carrier substances that help hold the tablet together) and then pressed into tablet form.
Tablets without coating: These tablets are made of powder or granulate pressed tightly together. If they’re not given a coating, they usually have a dull surface. It is important to take tablets with water to avoid them getting stuck in your food pipe, and so that there is enough liquid in your stomach to allow the tablet to dissolve.
Coated tablets (sugar-coated or film-coated tablets): Tablets can be covered with a layer to protect them against external influences, such as dampness or bacteria. Coated tablets are smooth, colored, and often shiny. They go down easier when you swallow and are tasteless. Depending on what the coating is made of and how thick it is, people differentiate between sugar-coated and film-coated tablets. Sugar-coated tablets are usually round or oval in shape; film-coated tablets only have a thin coating. If tablets contain active ingredients that have to be protected from the acid in the stomach, they are coated with a protective layer that is resistant to gastric acid (gastro-resistant). Then the active ingredients are not released until they reach the small intestine. Coated tablets should not be crushed or chewed because then they will no longer be protected by the coating.
- Fizzy tablets: Fizzy (effervescent) tablets are dissolved in a glass of water for drinking. They are well suited for people who have difficulty swallowing, and can have a faster effect than tablets because the medication has already dissolved by the time it arrives in the stomach.
Chewable tablets and lozenges: These contain active ingredients that are intended to have an effect in the throat, for example for a sore throat, or that can be absorbed through the lining of the mouth. These tablets are either chewed or sucked on.
Buccal tablets (from the Latin bucca meaning “cheek”), sublingual tablets (from the Latin sub meaning “under” and lingua meaning “tongue”): These soluble tablets are placed into a cheek pouch or under the tongue to let them slowly dissolve. The active ingredient is absorbed into the bloodstream directly through the lining of the mouth and spread through the rest of the body.