Pamidronic acid

Pamidronic acid
Systematic (IUPAC) name
(3-amino-1-hydroxypropane-1,1-diyl)bis(phosphonic acid)
Clinical data
AHFS/Drugs.com International Drug Names
MedlinePlus a601163
Pregnancy cat. B3(AU) D(US)
Legal status POM (UK) -only (US)
Routes Intravenous
Pharmacokinetic data
Bioavailability n/a
Protein binding 54%
Metabolism Nil
Half-life 28 ± 7 hours
Excretion Renal
Identifiers
CAS number 40391-99-9 Y
ATC code M05BA03
PubChem CID 4674
DrugBank APRD01161
ChemSpider 4512 Y
UNII OYY3447OMC Y
KEGG D07281 Y
ChEMBL CHEMBL834 Y
Chemical data
Formula C3H11NO7P2 
Mol. mass 235.07 g/mol
SMILES eMolecules & PubChem
 N(what is this?)  (verify)

Pamidronic acid (INN) or pamidronate disodium (USAN), pamidronate disodium pentahydrate is a nitrogen containing bisphosphonate, used to prevent osteoporosis. It is marketed by Novartis under the brand name Aredia.

Contents

Uses

It is used to prevent bone loss, and treat osteoporosis. It is also used to strengthen bone in Paget's disease, to prevent bone loss due to steroid use, and in certain cancers with high propensity to bone, such as multiple myeloma. In multiple myeloma, it is usually administered as an intravenous infusion, lasting about 3 hours. The therapy is repeated monthly, and lasts for the life of the patient. Due to its ability to sequester calcium in bone, it is also used to treat high calcium levels. It is also used as an experimental treatment of the bone disorder known as Osteogenesis Imperfecta, or brittle bones.

Administration

Intravenous, usually 90 mg monthly. 30 mg, 60 mg, and 90 mg vials are available, mixed with mannitol.

Side effects

Common side effects include bone pain, low calcium levels, nausea, and dizziness. Osteonecrosis of the jaw is a rare complication which has been associated with the use of bisphosphonates, including pamidronate.[1]

Pamidronate activates human γδ T cells in vitro and in vivo, which may lead to flu-like symptoms upon administration.

References

  1. ^ Zarychanski R, Elphee E, Walton P, Johnston J (2006). "Osteonecrosis of the jaw associated with pamidronate therapy.". Am J Hematol 81 (1): 73–5. doi:10.1002/ajh.20481. PMID 16369966.