7-[2-amino-2-(4-hydroxyphenyl) -acetyl]amino-3,3-dimethyl-6-oxo -2-thia-5-azabicyclo[3.2.0]heptane -4-carboxylic acid

Amoxicillin對活性繁殖期之感受性微生物之殺滅作用，主要是經由細菌細胞壁之Mucopeptide生合成之抑制所達成。

葡萄球菌、鏈球菌，肺炎雙球菌、腦膜炎球菌及其他具有感受性細菌所引起之感染症。

Absorption
Rapidly absorbed. T max is 1 to 2 h; C max is 3.5 mcg/mL (250 mg dose), 5 mcg/mL (500 mg dose), and approximately 13.8 mcg/mL (875 mg dose).

Distribution
Diffuses into most body tissues and fluids; penetration in CNS is poor unless meninges are inflamed. Approximately 20% protein bound.

Elimination
T ½ is 61.3 min; approximately 60% excreted in the urine within 6 to 8 h as unchanged drug.

Contraceptives, oral
May reduce efficacy of oral contraceptives.

Tetracyclines
May impair bactericidal effects of amoxicillin.