What is the peanut butter shot?

The peanut butter shot, also known as the "penicillin shot," is a slang term used by military personnel to describe the antibiotic injection of benzathine benzylpenicillin, which is commonly used to treat various bacterial infections. Although the shot is not actually made of peanut butter, the nickname comes from the thick consistency and color of the medication when it is injected. The injection is usually administered into the muscle, most commonly in the buttocks, and can be painful for some individuals due to the thickness of the medication. Despite the discomfort, the peanut butter shot is highly effective in treating infections and preventing the spread of bacteria in the body.