People are always advising us to chew the food before swallowing.but why there is an exemption to tablets?

The answer is quite simple. Chewing food makes it digestible and if I am not wrong many foods are delicious. Tablets on the other hands are easily absorbed from the gut and if I am not wrong, many have not a great taste. Indeed some are coated with sugar in order to not let their taste be felt for the smallest amount of time that is taken while they are passing through the mouth.

Mostly tablets made from a hygenic eatable chemicals. Now if you crush it you don't like the taste of it and main thing is what it contains can easily emerged with our body by some of harmons which are only developed in our liver and drug reacts fast with them mostly we take drug after having food because during digestion process most of our harmones develop in our digestive system. And last thing is our saliva is a taking part as catalyst during digetion it only makes easy to swallow the food.

Comprehensive comments by experts here...................... 

Digestion of food starts from mouth & chewing is the first step of  digestion. Food is always supposed to be palatable whereas medicinal tablets are not. 

 

Pharmaceutical companies manufacture tablets in a way that they dissolve in either stomach or in intestine (wherever needed). So you don't need to dissolve them in water (until or unless required) e.g., aspirin or other dispersible tablets. 

There's a different kind of drugs Usually tablets shouldn't be chew because if you crushed in the mouth the whole dose is released in5 or10 min and could result an initial overdose (risk of side effect)

Tablets are formulated in different methods. There are chewable tablets and water soluble tablets too. Generally, tablets are swallowed whole because if they are taken in any other way it might release the medicine in mouth and produce undesirable or unintended effects on the subject.