Clinical penicillin injections can be given in the muscles on both sides of the buttocks. The muscles on both sides of the buttocks are the main sites for clinical intramuscular injections, and there are gluteus maximus muscles on both sides of the buttocks, so both sides can be injected intramuscularly. Clinically, generally choose one side for intramuscular injection, for the treatment of some special diseases, such as syphilis, you can choose both sides of the gluteal muscle for treatment, the specific penicillin injection dosage and injection site need to be determined by a professional physician and nurse practitioner. Due to long-term gluteus maximus muscle injection of penicillin, on the one hand, the pain when injecting is obvious, and on the other hand, it may lead to the emergence of gluteal myoclonus syndrome in children’s growth and development, therefore, the clinic generally avoids long-term gluteal muscle injection. For the use of injectable penicillin, it is mainly administered by intravenous drip. It is recommended that the clinical use of penicillin treatment, need to follow the doctor’s instructions, do not use on their own.