Amoxycillin: like Ampicillin but differs in:
- Better absorption from intestine, so it has higher plasma and tissue levels.
- More active against Salmonella and Streptococcal fecalis (ampicillin more on shigella and H. influenza). & Typhoid
- Can penetrate mucoid and purulant sputum, so it is useful in chronic bronchitis.
- Less diarrhea as side effect.