Anaphylaxis is a severe and potentially life-threatening allergic reaction that occurs rapidly and affects multiple body systems.

Antibiotics are a class of drugs that are used to treat and prevent bacterial infections in humans and animals.

Benzathine benzylpenicillin, also known as benzathine penicillin G (BPG), is an antibiotic medication useful for the treatment of a number of bacterial infections.

A beta-lactam (β-lactam) ring is a four-membered lactam.

Carbon is a chemical element with the symbol C and atomic number 6.

Hydrogen is a chemical element with the symbol H and atomic number 1.

The kidney is an essential organ in the human body responsible for filtering waste products and excess water from the bloodstream, producing urine, and maintaining proper levels of electrolytes and fluids.

The liver is an organ in the human body located in the upper right abdomen.