Hetacillin

Hetacillin
Clinical data
Trade namesHetacin, Versapen
AHFS/Drugs.comVeterinary Use
Routes of
administration		Intramammary injection
ATC code
Legal status
Legal status
Identifiers
  • (2S,5R,6R)-6-[(4R)-2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.020.466 Edit this at Wikidata
Chemical and physical data
FormulaC19H23N3O4S
Molar mass389.47 g·mol−1
3D model (JSmol)
  • CC1([C@@H](N2[C@H](S1)[C@@H](C2=O)N3C(=O)[C@H](NC3(C)C)c4ccccc4)C(=O)O)C
  • InChI=1S/C19H23N3O4S/c1-18(2)13(17(25)26)21-15(24)12(16(21)27-18)22-14(23)11(20-19(22,3)4)10-8-6-5-7-9-10/h5-9,11-13,16,20H,1-4H3,(H,25,26)/t11-,12-,13+,16-/m1/s1 ☒N
  • Key:DXVUYOAEDJXBPY-NFFDBFGFSA-N ☒N
 ☒NcheckY (what is this?)  (verify)

Hetacillin is a beta-lactam antibiotic that is part of the aminopenicillin family. It is a prodrug and has no antibacterial activity itself,[1] but quickly splits off acetone in the human body to form ampicillin,[2] which is active against a variety of bacteria.

Administration

Hetacillin can be administered orally. The potassium salt, hetacillin potassium, is administered by injection, either intravenously[3] or intramuscularly.[4] It is sold under the trade name Hetacin for intramammary injection in veterinary use.[5]

Hetacillin was withdrawn from the market for human use when the discovery was made that it had no advantages over ampicillin.[6]

Chemistry

Hetacillin is prepared from ampicillin and acetone. In aqueous solutions it is unstable, with a half life of 15 to 30 minutes at 37 °C (99 °F) and pH 7, quickly releasing acetone again.[7]

References

  1. ^ "Hetacillin". Drugbank.
  2. ^ Sutherland R, Robinson OP (June 1967). "Laboratory and pharmacological studies in man with hetacillin and ampicillin". British Medical Journal. 2 (5555): 804–8. doi:10.1136/bmj.2.5555.804. PMC 1843140. PMID 5182358.
  3. ^ Tsuji Y, Tomita M (August 1970). "[Clinical effect of intravenous injection of potassium hetacillin (Versapen 'Bristol') on pre- and post-operative infections] (in Japanese)". The Japanese Journal of Antibiotics. 23 (4): 400–2. PMID 5312791.
  4. ^ Hara M, Takemoto S, Kawazu T (December 1970). "[Therapeutic experience with intramuscular injection of hetacillin (Versapen 'Bristol') in infection in children] (in Japanese)". The Japanese Journal of Antibiotics. 23 (5): 482–6. PMID 5314634.
  5. ^ Hetacin-K Intramammary Infusion for Veterinary Use
  6. ^ Smith JT, Hamilton-Miller J (1970). "Hetacillin: A Chemical and Biological Comparison with Ampicillin". Chemotherapy. 15 (6): 366–78. doi:10.1159/000220703. PMID 5514976.
  7. ^ Faine S, Harper M (January 1973). "Independent antibiotic actions of hetacillin and ampicillin revealed by fast methods". Antimicrobial Agents and Chemotherapy. 3 (1): 15–8. doi:10.1128/aac.3.1.15. PMC 444353. PMID 4597707.


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