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Syngacillin: Full Drug Profile
Medically reviewed by Min Clinic Staff | Updated: January 2026
Syngacillin - General Information
A cyclohexylamido analog of penicillanic acid. [PubChem]
Pharmacology of Syngacillin
Syngacillin, a penicillin, is a cyclohexylamido analog of penicillanic acid. Syngacillin is more resistant to beta-lactamase hydrolysis than ampicillin, is much better absorbed when given by mouth and, as a result, the levels reached in the blood and in the urine are considerably higher than those obtained with the same dose of ampicillin. Syngacillin has been replaced by newer penicillin treatments.
Additional information about Syngacillin
- Syngacillin Indication
For the treatment of bacterial infections caused by susceptible organisms.
- Mechanism Of Action
- The bactericidal activity of cyclacillin results from the inhibition of cell wall synthesis via affinity for penicillin-binding proteins (PBPs). Syngacillin is stable in the presence of a variety of b-lactamases, including penicillinases and some cephalosporinases.
- Generic Name
- Cyclacillin
- Synonyms
- Ciclacilline [INN-French]; Ciclacillinum [INN-Latin]; Ciclacilina [INN-Spanish]; Aminocyclohexylpenicillin; Ciclacillin; Ciclacillum
- Drug Category
- Anti-Bacterial Agents
- Drug Type
- Small Molecule; Approved
- Other Brand Names containing Cyclacillin
- Bastcillin; Calthor; Citosarin; Cyclapen; Cyclapen-W; Orfilina; Syngacillin; Ultracillin; Vastcillin; Vipicil; Wyvital;
- Absorption
- Moderately absorbed.
- Toxicity (Overdose)
- Symptoms of overdose include severe diarrhea, nausea and vomiting.
- Chemical IUPAC Name
- (2S,5R,6R)-6-[(1-aminocyclohexanecarbonyl)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
- Chemical Formula
- C15H23N3O4S
- Organisms Affected
- Enteric bacteria and other eubacteria
