Probably You've heard of Botox injections. It's a well-known cosmetic surgery used to remove wrinkles between the eyebrows and at the corners of the eyes. It is also used to treat diseases that cause muscle tension. But this Botox injection inject poison. The name of the poison is botulinum toxin which is a protein toxin produced by botulism.
Botulism is a causative bacteria well-known cause of food poisoning. It is found in mud and sand in soil, oceans, lakes, and rivers. Botulinum toxin is also known to be extremely toxic, causing paralysis of nerves and muscles. In the worst case scenario, a person suffering from botulinum toxin food poisoning will suffer respiratory paralysis and die.
This property has been applied for medical use. In other words, paralyzing the muscles can be said to have the effect of a good thing in some cases. By injecting botulinum toxin directly into a muscle, the muscle would be stiff and stopped. It is also effective for muscles that are in spasm.
In cosmetic surgery, it is mainly used to remove wrinkles. Wrinkles form when we smile because our facial muscles stretch and contract. By paralyzing these muscles, wrinkles are removed. (Botox injections can also make a person appear expressionless when smiling, so be careful not to overdo it.)
According to wikipedia, in the medical field, Botox is safe as long as the dosage is correct because it is used in small doses. Poison can also be a medicine depending on how it is used.