Clinical data
AHFS/ Micromedex Detailed Consumer Information
MedlinePlus a600042
  • c
Routes of
ATC code G02AD04 (WHO)
Legal status
Legal status
  • ℞ (Prescription only)
CAS Number 35700-23-3 YesY
PubChem (CID) 5281075
DrugBank DB00429 N
ChemSpider 4444532 YesY
UNII U4526F86FJ YesY
Chemical and physical data
Formula C21H36O5
Molar mass 368.508 g/mol
3D model (Jmol) Interactive image
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Carboprost (INN, trade names for the tromethamine salts Hemabate, Tham) is a synthetic prostaglandin analogue of PGF (specifically, it is 15-methyl-PGF) with oxytocic properties.

Carboprost induces contractions and can trigger abortion in early pregnancy. It also reduces postpartum bleeding.


Used in postpartum hemorrhage caused by uterine atony not controlled by other methods. One study has shown that carboprost tromethamine is more effective than oxytocin in preventing postpartum hemorrhage in high-risk patients undergoing caesarian delivery.[1] Carboprost is also used for the termination of pregnancy in the 2nd trimester.[2]

Unlabeled use:


Contraindicated in severe cardiovascular, renal, and hepatic disease. It is also contraindicated in acute Pelvic Inflammatory Disease. Hypersensitivity to carboprost or any of its components is also a contraindication[2] Exert caution in asthmatic patients as carboprost may cause bronchospasm.


Adverse Effects

Storage and Availability

Carboprost is supplied with its salt derivative tromethamine in 1 milliliter ampules containing a 250 microgram/milliliter solution of the active drug. The drug must be refrigerated at a temperature between 2 – 8 degrees Celsius.[2]


A significant deactivating metabolic transformation of natural prostaglandins is enzymatic oxidation of the C-15 hydroxyl to the corresponding ketone. This is prevented, with retention of activity, by methylation to give the C-15 tertiary carbinol series.

Carboprost synthesis:[3][4] G. L. Bundy et al., DE 2121980 ; G. L. Bundy, U.S. Patent 3,728,382 (1971, 1973 both to Upjohn).

This molecular feature is readily introduced at the stage of the Corey lactone (1) by reaction with methyl Grignard reagent or trimethylaluminium. The resulting mixture of tertiary carbinols (2) is transformed to oxytocic carboprost (3) by standard transformations, including sepoaration of diastereomers, so that the final product is the C-15 analogue. This diastereomer is reputably freeer of porstaglandin side effects than the C-15 (S) isomer.

See also


  1. Bai, J; Sun, Q; Zhai, H (2014). "A comparison of oxytocin and carboprost tromethamine in the prevention of postpartum hemorrhage in high-risk patients undergoing cesarean delivery.". Journal of Experimental and Therapeutic Medicine. 7 (1): 46–50. doi:10.3892/etm.2013.1379. PMID 24348762.
  2. 1 2 3 Hemabate [Package Insert]. New York, NY: Pharmacia and Upjohn Company; 2014.
  3. Yankee, Ernest W.; Axen, Udo; Bundy, Gordon L. (1974). "Total synthesis of 15-methylprostaglandins". Journal of the American Chemical Society. 96 (18): 5865. doi:10.1021/ja00825a027. PMID 4416671.
  4. Ann. N.Y. Acad. Sci. 180, 76 (1971).

External links

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