What diseases is penicillin suitable for treating?

Penicillin is a broad-spectrum antibiotic primarily used to treat various infectious diseases caused by susceptible bacteria. The following are some common conditions for which penicillin is indicated: 1. Respiratory tract infections: such as acute tonsillitis, pharyngitis, pneumonia, and acute bronchitis, which are usually caused by bacteria like Streptococcus or pneumococcus. 2. Skin and soft tissue infections: including cellulitis, folliculitis, and boils, often caused by Staphylococcus or Streptococcus. 3. Urinary tract infections: such as pyelonephritis and cystitis, which may be caused in some cases by Escherichia coli or other Gram-negative bacteria. 4. Endocarditis: inflammation of the heart valves caused by certain bacteria, for which penicillin is one of the preferred treatments. 5. Gonorrhea: a sexually transmitted disease caused by Neisseria gonorrhoeae, for which penicillin has historically been an effective treatment. An allergy test is required before administering penicillin, as it may cause severe allergic reactions, such as penicillin hypersensitivity. Additionally, misuse of antibiotics can lead to drug resistance; therefore, penicillin should be used under the guidance of a physician, and the entire course of treatment must be strictly followed as prescribed.