Aminopenicillins - (Amoxicillin, Ampicillin)
Mechanism of Action
Binds peptidoglycan binding protein to inhibit the cross-linking of peptidoglycan, therefore inhibiting bacterial cell wall synthesis.
Aminopenicillins are sensitive to penicillinase, so they are often paired with beta-lactamase inhibitors to protect them against breakdown because of this sensitivity.
Clinical Uses
Aminopencillins are extended spectrum penicillins, meaning they will cover more infections.
They are often used to treat infections cause by:
- gram-negative rods (H. influenze, H. pylori, E. coli, Listeria monocytogenes, Proteus mirabilis, Salmonella
You can think of the HHELPS bugs
- gram-positive cocci - Enterococcus
Adverse Effects
- allergic reactions
- hypersensitivity, skin rash
- pseudomembranous colitis
Mechanism of resistance
These antibiotics are sensitive to penicillinase which will cleave their beta-lactam ring
Miscellaneous
Amoxicillin is typically given in the oral form
amOxicillin - think Orally