You usually take medicine when you are sick. If you send medicine to someone who is not sick, it is equivalent to cursing the person who receives the medicine and hoping that the other person will get sick.
It really doesn't feel very lucky to send medicine to people who are not sick. But if your friend is sick and uncomfortable, and you happen to have medicine, then it is no problem for you to send medicine to your sick friend.
Generally, there is no medicine, even if the health care products are not close relatives and friends, they will not be sent. China people pay attention to etiquette, and do things more implicitly. Generally, they send something that symbolizes good luck and beauty. And medicine is taboo. So generally do not send medicine.
Some gifts that are not suitable for giving are:
1. Clocks and watches: the "bell" of clocks and watches is homophonic with the "end" of doomsday. Giving a person a clock means ending and cursing others. Giving someone a clock has a bad meaning.
2. Candles: Candles are usually used to sacrifice to the dead, so it is unlucky to give them to others.
3. Doll: Doll will be regarded as a "villain". There is a saying that leaving a villain at home for a long time is easy to attract evil spirits, so it is not good to use it as a gift.