07/08/2026
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Antibiotics – Short Note
Definition:
Antibiotics are medicines used to treat bacterial infections by killing bacteria or stopping their growth. They do not work against viral infections such as the common cold or influenza.
Types of Antibiotics:
Bactericidal: Kill bacteria (e.g., Penicillin, Ceftriaxone).
Bacteriostatic: Stop bacterial growth (e.g., Doxycycline, Azithromycin).
Common Classes and Examples:
Penicillins: Amoxicillin, Penicillin
Cephalosporins: Cefixime, Ceftriaxone
Macrolides: Azithromycin, Erythromycin
Tetracyclines: Doxycycline
Fluoroquinolones: Ciprofloxacin, Levofloxacin
Aminoglycosides: Gentamicin, Amikacin
Common Uses:
Pneumonia
Urinary tract infections (UTIs)
Skin and soft tissue infections
Ear, nose, and throat infections
Typhoid fever
Meningitis (specific antibiotics)
Side Effects:
Nausea and vomiting
Diarrhea
Allergic reactions
Skin rash
Fungal infections after prolonged use
Precautions:
Take antibiotics only when prescribed by a healthcare professional.
Complete the full course, even if you feel better.
Do not use antibiotics for viral illnesses.
Avoid sharing antibiotics with others.
Misuse can lead to antibiotic resistance, making bacteria harder to treat.
Antibiotic Resistance: Antibiotic resistance occurs when bacteria become resistant to antibiotics due to overuse or incorrect use. This makes infections more difficult to treat and is a major global health concern.
Key Point:
Antibiotics are life-saving medicines for bacterial infections, but they should be used responsibly to prevent antibiotic resistance and ensure they remain effective in the future.
