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Carboprost
Clinical data
Trade names	Hemabate
AHFS/Drugs.com	Micromedex Detailed Consumer Information
MedlinePlus	a600042
Pregnancy; category	AU: D; ;
Routes of; administration	Intramuscular
ATC code	G02AD04 (WHO) ;
Legal status
Legal status	AU: S4 (Prescription only); In general: ℞ (Prescription only);
Identifiers
	IUPAC name (5Z,9α,11α,13E,15S)-9,11,15-trihydroxy-15- methylprosta-5,13-dien-1-oic acid;
CAS Number	35700-23-3 ; tromethamine : 58551-69-2 ;
PubChem CID	5281075;
DrugBank	DB00429 ;
ChemSpider	4444532 ;
UNII	7B5032XT6O ; tromethamine : U4526F86FJ ;
KEGG	D02343;
ChEBI	CHEBI:3403;
ChEMBL	ChEMBL1237122 ;
CompTox Dashboard (EPA)	DTXSID4022739 ;
Chemical and physical data
Formula	C21H36O5
Molar mass	368.514 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES O=C(O)CCC/C=C/C[C@H]1[C@@H](O)C[C@@H](O)[C@@H]1/C=C/[C@](O)(C)CCCCC;
	InChI InChI=1S/C21H36O5/c1-3-4-9-13-21(2,26)14-12-17-16(18(22)15-19(17)23)10-7-5-6-8-11-20(24)25/h5,7,12,14,16-19,22-23,26H,3-4,6,8-11,13,15H2,1-2H3,(H,24,25)/b7-5-,14-12+/t16-,17-,18+,19-,21+/m1/s1 ; Key:DLJKPYFALUEJCK-IIELGFQLSA-N ;
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Carboprost (INN, trade names for the tromethamine salts Hemabate, Tham) is a synthetic prostaglandin analogue of PGF_2α (specifically, it is 15-methyl-PGF_2α) with oxytocic properties.

Carboprost's main use is in the obstetrical emergency of postpartum hemorrhage which reduces postpartum bleeding during these circumstances.

Indication

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 cesarean delivery.^[2]

Carboprost was the first drug widely used for medication abortions. It is still sometimes used for second trimester abortions, but has generally been supplanted by the mifepristone/misoprostol combination.^[3]^[4]^[5]^[6]^[7]^[8]

Contraindication

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^[3]

Precautions

asthma
anemia
jaundice
diabetes mellitus
seizure disorders
past uterine surgery

Adverse Effects

diarrhea (most common, may be sudden in onset)
flushing or hot flashes
fever
chills
nausea/vomiting

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.^[3]

Synthesis

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.

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 separation of diastereomers, so that the final product is the C-15 analogue. This diastereomer is reputably freeer of prostaglandin side effects than the C-15 (S) isomer.

References

^ "Carboprost-REACH (Reach Pharmaceuticals Pty Ltd)". Therapeutic Goods Administration (TGA). 28 July 2023. Retrieved 10 September 2023.
^ Bai J, Sun Q, Zhai H (January 2014). "A comparison of oxytocin and carboprost tromethamine in the prevention of postpartum hemorrhage in high-risk patients undergoing cesarean delivery". Experimental and Therapeutic Medicine. 7 (1): 46–50. doi:10.3892/etm.2013.1379. PMC 3861477. PMID 24348762.
^ ^a ^b ^c Hemabate [Package Insert]. New York, NY: Pharmacia and Upjohn Company; 2014.
^ "Carboprost" - Drug fact sheet, Mayo Clinic. Last updated: July 01, 2024 https://www.mayoclinic.org/drugs-supplements/carboprost-intramuscular-route/proper-use/drg-20067975
^ Vukelić J. Second trimester pregnancy termination in primigravidas by double application of dinoprostone gel and intramuscular administration of carboprost tromethamine. Med Pregl. 2001 Jan-Feb;54(1-2):11-6. English, Croatian. PMID: 11436877.
^ Bygdeman, M., & Gemzell-Danielsson, K. (2008). An Historical Overview of Second Trimester Abortion Methods. Reproductive Health Matters, 16(sup31), 196–204. https://doi.org/10.1016/S0968-8080(08)31385-8
^ Schwallie PC, Lamborn KR. Induction of abortion by intramuscular administration of (15S)-15-methyl PGF2 alpha. An overview of 815 cases. J Reprod Med. 1979 Dec;23(6):289-93. PMID: 392084.
^ Bhaskar A, Dimov V, Baliga S, Kinra G, Hingorani V, Laumas KR. Plasma levels of 15 (S) 15-methyl-PGF 2 alpha-methyl ester following vaginal administration for induction of abortion in women. Contraception. 1979 Nov;20(5):519-31. doi: 10.1016/0010-7824(79)90057-x. PMID: 527343.
^ Yankee EW, Axen U, Bundy GL (September 1974). "Total synthesis of 15-methylprostaglandins". Journal of the American Chemical Society. 96 (18): 5865–76. doi:10.1021/ja00825a027. PMID 4416671.
^ Bundy G, Lincoln F, Nelson N, Pike J, Schneider W (April 1971). "Novel prostaglandin syntheses". Annals of the New York Academy of Sciences. 180 (1): 76–90. Bibcode:1971NYASA.180...76B. doi:10.1111/j.1749-6632.1971.tb53186.x. PMID 5286110. S2CID 34735617.
^ G. L. Bundy et al., DE 2121980, Gordon, Leonard; Pike, John Edward & Schneider, William Paul, "Verfahren zur Herstellung nueur Prostansäurederivate [Process for the production of new prostanoic acid derivatives]", published 1971-11-25, assigned to The Upjohn Co.