Metacillin

Metacillin Uses, Dosage, Side Effects, Food Interaction and all others data.

One of the penicillins which is resistant to penicillinase but susceptible to a penicillin-binding protein. It is inactivated by gastric acid so administered by injection.

Metacillin (INN, BAN) or methicillin (USAN) is a narrow spectrum beta-lactam antibiotic of the penicillin class. It is no longer clinically used. Its role in therapy has been largely replaced by flucloxacillin and dicloxacillin, however the term methicillin-resistant Staphylococcus aureus (MRSA) continues to be used to describe Staphylococcus aureus strains resistant to all penicillins.

Metacillin
Uses
Dosage
Side Effect
Precautions
Interactions
Uses during Pregnancy
Uses during Breastfeeding
Accute Overdose
Food Interaction
Half Life
Volume of Distribution
Clearance
Interaction With other Medicine
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Trade Name	Metacillin
Generic	Meticillin
Meticillin Other Names	Methicillin, Methicillinum, Methycillin, Meticilina, Meticillin, Meticillina, Meticilline, Meticillinum
Type
Formula	C₁₇H₂₀N₂O₆S
Weight	Average: 380.415 Monoisotopic: 380.104207072
Groups	Approved, Investigational
Therapeutic Class
Manufacturer
Available Country
Last Updated:	September 19, 2023 at 7:00 am

Uses

Used to treat infections caused by susceptible Gram-positive bacteria, particularly beta-lactamase-producing organisms such as Staphylococcus aureus that would otherwise be resistant to most penicillins.

How Metacillin works

Similar to other beta-lactam antimicrobials, meticillin blocks synthesis of the bacterial cell wall. Metacillin stops cross-linkage between the peptidoglycan polymer chains, which make up a large portion of gram-positive bacterial cell walls. It does this by binding to and competitively inhibiting the transpeptidase enzyme used by bacteria to cross-link the peptide (D-alanyl-alanine) used in peptidogylcan synthesis.