Zhongshan social security card can buy medicine.

Yes, you can. At present, most pharmacies support swiping social security cards, so as long as pharmacies support swiping social security cards, as long as there is a balance on your social security card, you can swipe your card to buy medicines. There is an outpatient fee on the social security card, that is, you can directly deduct the card when you take medicine from the outpatient clinic or pharmacy.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.