If it is written in the instruction manual that it can be taken directly by mouth, then it can be swallowed directly. If it is written in the instruction manual that it can be chewed and the tablets are large, it is recommended to take calcium tablets according to the instruction manual. Calcium in calcium tablets are fully absorbed by the body, it is recommended to chew and then swallow better, can effectively reduce the burden on the gastrointestinal tract, better promote gastrointestinal absorption of calcium, chewing at the same time, the oral cavity will secrete more saliva, for digestion and absorption has a certain role in promoting. Calcium tablets are rich in calcium, it is recommended to take calcium tablets after meals, if taken before meals, may be combined with food ingredients, affecting the absorption of calcium. The best time to take calcium tablets is half an hour after meals, when stomach acid is more energetic and it is easier to be absorbed. Calcium tablets should be taken in accordance with the instructions, and the dosage should be taken in accordance with the doctor’s instructions to avoid adverse effects.