Felodipine

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Felodipine


Systematic (IUPAC) name
(RS)-3-ethyl 5-methyl 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate
Clinical data
Trade names	Plendil
AHFS/Drugs.com	monograph
MedlinePlus	a692016
Pregnancy cat.	C (US)
Legal status	℞ Prescription only
Routes	Oral
Pharmacokinetic data
Bioavailability	15% ^[1]
Metabolism	Hepatic
Half-life	??
Excretion	Renal
Identifiers
CAS number	72509-76-3^Y
ATC code	C08CA02
PubChem	CID 3333
IUPHAR ligand	4190
DrugBank	DB01023
ChemSpider	3216^Y
UNII	OL961R6O2C^Y
KEGG	D00319^Y
ChEBI	CHEBI:585948^Y
ChEMBL	CHEMBL1480^Y
Chemical data
Formula	C₁₈H₁₉Cl₂N O₄
Mol. mass	384.259 g/mol
SMILES O=C(OCC)\C1=C(\N/C(=C(/C(=O)OC)C1c2cccc(Cl)c2Cl)C)C
InChI InChI=1S/C18H19Cl2NO4/c1-5-25-18(23)14-10(3)21-9(2)13(17(22)24-4)15(14)11-7-6-8-12(19)16(11)20/h6-8,15,21H,5H2,1-4H3^Y Key:RZTAMFZIAATZDJ-UHFFFAOYSA-N^Y
Y (what is this?) (verify)

Felodipine is a calcium channel blocker (calcium antagonist), a drug used to control hypertension (high blood pressure). It is marketed under the brand name Plendil by AstraZeneca and Renedil by Sanofi-Aventis. The formulation patent for the substance expired in 2007.

AstraZeneca dropped Plendil from its support and AZ&Me free Rx access program in October 2008.

Interactions

Studies dating back to 1989 have suggested that felodipine in combination with grapefruit juice can cause toxic effects. Oral administration of felodipine is first metabolized in the gastrointestinal tract and liver by the enzyme CYP3A4. Grapefruit juice contains bergamottin which is found to have an inhibiting effect over this enzyme and as a result the bioavailability of the drug increases, raising the risk for abnormal side effects.^[2]

Contraindications and cautions

Contraindicated with allergy to felodipine or other calcium channel blockers, sick sinus syndrome, heart block (second and third degree), lactation. Use cautiously with pregnancy, impaired hepatic function.

Synthesis

Berntsson, P. B.; Carlsson, A. I.; Gaarder, J. O.; Ljung, B. R.; 1981, U.S. Patent 4,264,611.

References

↑ AstraZeneca MI Department, 16th April 2010.
↑ Jawad Kiani, Sardar Z Imam (October 30, 2007). "Medicinal importance of grapefruit juice and its interaction with various drugs". Nutr J. 6 (33): 33. doi:10.1186/1475-2891-6-33. PMC 2147024. PMID 17971226. Retrieved 2008-04-09. .

v t e Channel blockers

Calcium (Ca²⁺)	Amlodipine Amrinone Anandamide Anipamil Aranidipine Azelnidipine Azimilide Barnidipine Bencyclane Benidipine Bepridil Berbamine Bevantolol Canadine Carboxyamidotriazole Caroverine Cilnidipine Cinnarizine Clentiazem Clevidipine Conotoxins Darodipine Dauricine Devapamil Diltiazem Dimeditiapramine Dotarizine Dronedarone Efonidipine Emopamil Enpiperate Eperisone Ethosuximide Falipamil Fantofarone Fasudil Felodipine Fenamic acid Fendiline Flunarizine Fostedil Gallopamil Isradipine Lacidipine Lamotrigine Lercanidipine Lidoflazine Magnesium sulfate Manidipine Manoalide Mepirodipine Mesuximide Mibefradil Monatepil Naftopidil Nicardipine Nifedipine Niguldipine Niludipin Nilvadipine Nimodipine Nisoldipine Nitrendipine Norverapamil Ochratoxin A Osthol Otilonium bromide Oxodipine Perhexiline Phensuximide Pinaverium Piperidine Pranidipine Prenylamine Risedronic acid Ryodipine Sesamodil Sodium valproate Stepholidine TROX-1 Terodiline Tetrahydropalmatine Tetrandrine Tolfenamic acid Tranilast Valnoctamide Valperinol Valproate pivoxil Valproate semisodium Valproic acid Valpromide Verapamil Ziconotide Selective VDCC ligands: 4-Methylpregabalin Atagabalin Gabapentin Gabapentin enacarbil Imagabalin PD-200,347 PD-217,014 PD-299,685 Pregabalin

Potassium (K⁺)	3,4-Diaminopyridine 4-Aminopyridine Amiodarone Bretylium Bunaftine Charybdotoxin Conotoxins Dofetilide Dronedarone E-4031 Ibutilide Linopirdine Maurotoxin Nifekalant Paxilline Sotalol Tedisamil Tetraethylammonium Vernakalant

Sodium (Na⁺)	Antiarrhythmics: Ajmaline Aprindine Disopyramide Dronedarone Encainide Flecainide Lidocaine Lorajmine Lorcainide Mexiletine Moricizine Phenytoin Pilsicainide Prajmaline Procainamide Propafenone Quinidine Sparteine Tocainide Anticonvulsants: Carbamazepine Eslicarbazepine acetate Ethotoin Fosphenytoin Licarbazepine Mephenytoin Oxcarbazepine Oxitriptyline Phenytoin Rufinamide Topiramate Sodium valproate Valnoctamide Valproate pivoxil Valproate semisodium Valproic acid Valpromide Diuretics: Amiloride Benzamil Triamterene Local anesthetics: pFBT Amylocaine Articaine Benzocaine Bupivacaine (Levobupivacaine, Ropivacaine) Butacaine Butamben Chloroprocaine Cinchocaine Cocaine Cyclomethycaine Dimethocaine Etidocaine Hexylcaine Iontocaine Lidocaine Mepivacaine Meprylcaine Metabutoxycaine Orthocaine Piperocaine Prilocaine Procaine Propoxycaine Proxymetacaine Risocaine Tetracaine Trimecaine Toxins: Conotoxins Neosaxitoxin Saxitoxin Tetrodotoxin Others: Menthol

Other	Uncategorized: Ethadione Paramethadione Phenacemide Pheneturide Trimethadione

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