The penicillins: a review and update

Area of Science:

• Pharmacology
• Infectious Diseases
• Bacteriology

Background:

• Penicillins are vital antibiotics in primary care, known for their bactericidal action and efficacy.
• Synthetic penicillins have expanded their spectrum and effectiveness, yet bacterial resistance poses a challenge.
• Penicillins remain crucial for soft tissue infections and specific pregnancy cases.

Purpose of the Study:

• To review penicillin classes used in primary care, including their mechanisms, spectrum, and adverse effects.
• To highlight clinical considerations for managing penicillin allergy, particularly in women.
• To address the impact of perceived penicillin allergy on treatment and resistance.

Main Methods:

• Literature review of penicillin pharmacology and clinical applications.
• Analysis of data on bacterial resistance patterns to penicillins.
• Examination of diagnostic approaches for penicillin allergy, including skin testing.
• Review of clinical guidelines for penicillin use in pregnancy and allergy.

Main Results:

• Penicillins exhibit broad-spectrum activity and are effective against susceptible bacteria.
• Bacterial resistance to penicillins is an increasing concern, limiting their use.
• Self-reported penicillin allergy is often not a true allergy, as indicated by skin testing.
• Avoiding penicillin in non-allergic patients can contribute to antibiotic resistance.

Conclusions:

• Penicillins remain essential in primary care despite resistance, especially for specific infections and in pregnancy.
• Accurate assessment of penicillin allergy is crucial to avoid unnecessary avoidance of this important antibiotic class.
• Prudent use and allergy evaluation can help mitigate the development of bacterial resistance.