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Penicillin G benzathine

Benzathine benzylpenicillin
Benzylpenicillin-Benzathin Structural Formula V.1.svg
Combination of
Benzylpenicillin antibiotic
Benzathine stabilizer
Clinical data
Trade names Bicillin L-A, Permapen, others
Synonyms penicillin benzathine benzyl, benzathine penicillin, penicillin G benzathine, benethamine penicilline, benzylpenicillin benzathine
AHFS/Drugs.com Professional Drug Facts
Pregnancy
category
  • US: B (No risk in non-human studies)
ATC code
Identifiers
CAS Number
PubChem CID
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
E number E708 (antibiotics)
ECHA InfoCard 100.014.782
 NYesY (what is this?)  

Benzathine benzylpenicillin, also known as benzathine penicillin G, is an antibiotic useful for the treatment of a number of bacterial infections. Specifically it is to treat strep throat, diphtheria, syphilis, and yaws. It is also used to prevent rheumatic fever. It is given by injection into a muscle.

Side effects include allergic reactions including anaphylaxis, and pain at the site of injection. When used to treat syphilis a reaction known as Jarisch-Herxheimer may occur. It is not recommended in those with a history of penicillin allergy or those with syphilis involving the nervous system. Use during pregnancy is generally safe. It is in the penicillin and beta lactam class of medications and works via benzylpenicillin. The benzathine component slowly releases the penicillin making the combination long acting.

Benzathine benzylpenicillin was patented in 1950. It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system. The wholesale cost in the developing world is about 0.27 to 1.71 USD for a course of treatment. In the United States the medication costs 50 to 100 USD for a dose as of 2015. In the United Kingdom it costs the NHS about 0.95 to 1.89 pounds a dose as of 2015.


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