Pivmecillinam

Pivmecillinam (INN) or amdinocillin pivoxil (USAN, trade names Selexid, Penomax and Coactabs) is an orally active prodrug of mecillinam, an extended-spectrum penicillin antibiotic. Pivmecillinam is the pivaloyloxymethyl ester of mecillinam.

Pivmecillinam
Clinical data
AHFS/Drugs.comMicromedex Detailed Consumer Information
Pregnancy
category

  • Appears safe in pregnancy[1]
Routes of
administration		Oral
ATC code
Legal status
Legal status
  • In general: ℞ (Prescription only)
Pharmacokinetic data
BioavailabilityLow
Protein binding5 to 10% (as mecillinam)
MetabolismPivmecillinam is hydrolyzed to mecillinam
Elimination half-life1 to 3 hours
ExcretionRenal and biliary, mostly as mecillinam
Identifiers
IUPAC name
  • 2,2-dimethylpropanoyloxymethyl (2S,5R,6R)-6-[(azepan-1-ylmethylene)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate
CAS Number
PubChem CID
ChemSpider
UNII
KEGG
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.046.600
Chemical and physical data
FormulaC21H33N3O5S
Molar mass439.57 g·mol−1
3D model (JSmol)
SMILES
  • CC1(C(N2C(S1)C(C2=O)N=CN3CCCCCC3)C(=O)OCOC(=O)C(C)(C)C)C
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Pivmecillinam is only considered to be active against Gram-negative bacteria, and is used primarily in the treatment of lower urinary tract infections. In the Nordic countries, it has been widely used in that indication since the 1970s. It has been proposed as the first-line drug of choice for empirical treatment of acute cystitis.[1][2] It has also been used to treat paratyphoid fever and shigellosis.[3]

Activity
See also: Mecillinam

Adverse effects
See also: Beta-lactam antibiotic: Adverse effects

The adverse effect profile of pivmecillinam is similar to that of other penicillins. The most common side effects of mecillinam use are rash and gastrointestinal upset, including nausea and vomiting.[1][4]

Prodrugs that release pivalic acid when broken down by the body — such as pivmecillinam, pivampicillin and cefditoren pivoxil — have long been known to deplete levels of carnitine.[5][6] This is not due to the drug itself, but to pivalate, which is mostly removed from the body by forming a conjugate with carnitine. Although short-term use of these drugs can cause a marked decrease in blood levels of carnitine,[7] it is unlikely to be of clinical significance;[6] long-term use, however, appears problematic and is not recommended.[6][8][9]

References
  1. Nicolle LE (August 2000). "Pivmecillinam in the treatment of urinary tract infections". J Antimicrob Chemother. 46 (Suppl A): 35–39. doi:10.1093/jac/46.suppl_1.35. PMID 10969050.
  2. Graninger W (October 2003). "Pivmecillinam—therapy of choice for urinary tract infection". Int J Antimicrob Agents. 22. Suppl 2: 73–8. doi:10.1016/S0924-8579(03)00235-8. PMID 14527775.
  3. Tanphaichitra D, Srimuang S, Chiaprasittigul P, Menday P, Christensen OE (1984). "The combination of pivmecillinam and pivampicillin in the treatment of enteric fever". Infection. 12 (6): 381–3. doi:10.1007/BF01645219. PMID 6569851.
  4. "Selexid Tablets". electronic Medicines Compendium. June 5, 2008. Retrieved on August 31, 2008.
  5. Holme E, Greter J, Jacobson CE, et al. (August 1989). "Carnitine deficiency induced by pivampicillin and pivmecillinam therapy". Lancet. 2 (8661): 469–73. doi:10.1016/S0140-6736(89)92086-2. PMID 2570185.
  6. Brass EP (December 2002). "Pivalate-generating prodrugs and carnitine homeostasis in man". Pharmacol Rev. 54 (4): 589–98. doi:10.1124/pr.54.4.589. PMID 12429869.
  7. Abrahamsson K, Holme E, Jodal U, Lindstedt S, Nordin I (June 1995). "Effect of short-term treatment with pivalic acid containing antibiotics on serum carnitine concentration—a risk irrespective of age". Biochem. Mol. Med. 55 (1): 77–9. doi:10.1006/bmme.1995.1036. PMID 7551831.
  8. Holme E, Jodal U, Linstedt S, Nordin I (September 1992). "Effects of pivalic acid-containing prodrugs on carnitine homeostasis and on response to fasting in children". Scand J Clin Lab Invest. 52 (5): 361–72. doi:10.3109/00365519209088371. PMID 1514015.
  9. Makino Y, Sugiura T, Ito T, Sugiyama N, Koyama N (September 2007). "Carnitine-associated encephalopathy caused by long-term treatment with an antibiotic containing pivalic acid". Pediatrics. 120 (3): e739–41. doi:10.1542/peds.2007-0339. PMID 17724113.
Skeletal formula of mecillinam, the active moiety of pivmecillinam
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