: What is the benefit of effervescent tablets? So you have these 'fizzing' tablets, that are to the best of my knowledge referred to as effervescent tablets. The wiki page provides some details, including that they are tablets

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The main reason why you'd want to prescribe effervescent tablets is when the person can't swallow tablets, or, the tablet is unpleasantly large such as some calcium tablets. Then one can use dispersible calcium tablets.

However, the reasons one manufacturer lists are:

Oral dosage forms are the most popular way of taking medication, despite having some disadvantages compared with other methods. One such disadvantage is the risk of slow absorption of the active pharmaceutical ingredient (API), which can be overcome by administering the drug in liquid form and, therefore, possibly allowing the use of a lower dosage. However, because many APIs only show a limited level of stability in liquid form, effervescent tablets, which are dissolved in water before administration, have been formulated as an alternative dosage form

This also allows:

an opportunity for formulators to improve the taste;
a more gentle action on a patient's stomach;
marketing aspects (fizzy tablets may have more consumer appeal than traditional dosage forms).

However, it requires a more complex manufacturing process

Fundamentals of effervescents Effervescents consist of a soluble organic acid and an alkali metal carbonate salt, one of which is often the API. Carbon dioxide is formed if this mixture comes into contact with water. Typical examples of the acids and alkalis used include:

citric acid
tartaric acid
malic acid
fumaric acid
adipic acid
sodium bicarbonate
sodium carbonate
sodium sesquicarbonate
potassium bicarbonate
potassium carbonate

www.pharmtech.com/effervescent-dosage-manufacturing