Patients with leg cramps can first try to take the following over-the-counter calcium preparations: 1. Patients can choose inorganic calcium-based drugs, such as commonly used calcium carbonate, calcium chloride, calcium sulfate; 2. Patients can choose organic calcium-based calcium preparations, such as commonly used calcium lactate, calcium gluconate; 3. Patients can choose complex calcium preparations containing vitamin D, such as calcium carbonate and vitamin D complex This helps the absorption and utilization of calcium; 4. Patients can choose active calcium, which is very well absorbed and has a high calcium content but is more expensive. If a patient with foot cramps takes calcium preparations that may or may not be effective, once the patient has taken the medication and the effect is not good, he or she must go to the orthopedic clinic in time to clarify the cause and then carry out standardized treatment, never just deal with it on his own.