First, patients can eat inorganic calcium. This drug is commonly used in calcium carbonate, calcium sulfate and the like. The calcium content of these drugs is very high, but it may stimulate the gastrointestinal tract to some extent. If patients have no related adverse reactions after taking them, they can get very good therapeutic effects through these drugs.

Second, patients can take organic calcium. Commonly used are calcium gluconate, calcium lactate and the like. This kind of drugs contain a little less calcium, but have little irritation to the gastrointestinal tract, and are suitable for elderly patients with gastrointestinal related diseases.

Third, patients can take active calcium. This is a kind of liquid calcium supplement preparation with high calcium content and good absorption.

Fourth, patients can take some compound preparations containing calcium and vitamin D to promote the absorption and utilization of calcium.