Fenoprofen

Fenoprofen is a nonsteroidal anti-inflammatory drug (NSAID). Fenoprofen calcium is used for symptomatic relief for rheumatoid arthritis, osteoarthritis, and mild to moderate pain. Fenoprofen is marketed in the US as Nalfon.

Fenoprofen

Clinical data
AHFS/Drugs.com	Monograph
MedlinePlus	a681026
Pregnancy category	US: D (Evidence of risk) C
Routes of administration	Oral
ATC code	M01AE04 (WHO)
Legal status
Legal status	UK: POM (Prescription only) US: ℞-only
Pharmacokinetic data
Metabolism	Major urinary metabolites are fenoprofen glucuronide and 4′-hydroxyfenoprofen glucuronide.
Elimination half-life	3 hours
Excretion	Renal (~90%)
Identifiers
IUPAC name 2-(3-phenoxyphenyl)propanoic acid
CAS Number	29679-58-1^Y
PubChem CID	3342
IUPHAR/BPS	4820
DrugBank	DB00573^Y
ChemSpider	3225^Y
UNII	RA33EAC7KY
KEGG	D02350^Y
ChEBI	CHEBI:5004^Y
ChEMBL	ChEMBL1297^Y
CompTox Dashboard (EPA)	DTXSID9023045
ECHA InfoCard	100.045.231
Chemical and physical data
Formula	C15H14O3
Molar mass	242.274 g·mol^−1
3D model (JSmol)	Interactive image
SMILES O=C(O)C(c2cc(Oc1ccccc1)ccc2)C
InChI InChI=1S/C15H14O3/c1-11(15(16)17)12-6-5-9-14(10-12)18-13-7-3-2-4-8-13/h2-11H,1H3,(H,16,17)^Y Key:RDJGLLICXDHJDY-UHFFFAOYSA-N^Y
(verify)

As of 2015 the cost for a typical month of medication in the United States is 50 to US$100.[1]

Pharmacology

Decreases inflammation, pain, and fever, probably through inhibition of cyclooxygenase (COX-2 inhibitor) activity and prostaglandin synthesis.

Contraindications

History of significantly impaired renal function; patients with known hypersensitivity to any component of the product; patients who have experienced asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs; treatment of perioperative pain in the setting of coronary artery bypass graft (CABG) surgery.

Drug interactions

• Aminoglycosides (e.g. gentamicin): Plasma aminoglycoside levels may be elevated.
• Angiotensin-converting enzyme (ACE) inhibitors: Antihypertensive effect of ACE inhibitors may be diminished.
• Anticoagulants: Coadministration may prolong prothrombin time.
• Aspirin: Fenoprofen Cl may be increased; coadministration is not recommended.
• Diuretics: Patients treated with fenoprofen may be resistant to the effects of loop diuretics and thiazides.
• Hydantoins, sulfonamides, sulfonylureas: Fenoprofen may displace these drugs from their binding site.
• Lithium: Renal Cl of lithium may be reduced and plasma levels may be elevated, which may increase the risk of lithium toxicity.
• Methotrexate: May increase methotrexate levels.
• Phenobarbital: May decrease fenoprofen t ½ . Dosage adjustments of fenoprofen may be required if phenobarbital is added or withdrawn.
• SSRIs (e.g. fluoxetine, citalopram): The risk of GI effects may be increased.

Laboratory test interactions

False elevation in free and total serum T 3 as measured by Amerlex-M kit.

Brand names

• UK - Fenopron (Typharm Limited)

References

1. Hamilton, Richart (2015). Tarascon Pocket Pharmacopoeia 2015 Deluxe Lab-Coat Edition. Jones & Bartlett Learning. p. 8X. ISBN 9781284057560.

External links

• Fenoprofen info from Drugs.com