Methecillin or Metecillin is a narrow spectrum beta lactum antibiotic from the penicillin family.
Developed by the Beecham Organisation in 1959.
It has been used to treat infections for various conditions including Staphylococcus Aureus.
However MRSA has developed and is not just resistant to Methecillin but to all penicillins.
Methecillin is no longer manufactured as more stable penicillins such as Flucloxcillin, Ocacillin and Dioxacillin are used within the medical arena