Product InformationRegistration Status: Active
FLOLAN FOR INFUSION 0.5mg/VIAL is approved to be sold in Singapore with effective from 1988-04-07. It is marketed by GLAXOSMITHKLINE PTE LTD, with the registration number of SIN02241P.
This product contains Epoprostenol 0.5mg/vial in the form of INJECTION, POWDER, FOR SOLUTION. It is approved for INTRAVASCULAR use.
This product is manufactured by GLAXOSMITHKLINE MANUFACTURING S.P.A. (Powder) in ITALY, andGLAXO OPERATIONS UK LTD.(TRADING AS GLAXO WELLCOME OPERATIONS)(Diluent-Manufacture in UNITED KINGDOM.
It is a Prescription Only Medicine that can only be obtained from a doctor or a dentist, or a pharmacist with a prescription from a Singapore-registered doctor or dentist.
A prostaglandin that is a powerful vasodilator and inhibits platelet aggregation. It is biosynthesized enzymatically from prostaglandin endoperoxides in human vascular tissue. The sodium salt has been also used to treat primary pulmonary hypertension.
For the long-term intravenous treatment of primary pulmonary hypertension and pulmonary hypertension associated with the scleroderma spectrum of disease in NYHA Class III and Class IV patients who do not respond adequately to conventional therapy.
Mechanism of Action
Prostaglandins are present in most body tissues and fluids and mediate many biological functions. Epoprostenol (PGI2) is a member of the family of prostaglandins that is derived from arachidonic acid. The major pharmacological actions of epoprostenol is ultimately inhibition of platelet aggregation. Prostacyclin (PGI2) is released by healthy endothelial cells and performs its function through a paracrine signaling cascade that involves G protein-coupled receptors on nearby platelets and endothelial cells. The platelet Gs protein-coupled receptor (prostacyclin receptor) is activated when it binds to PGI2. This activation, in turn, signals adenylyl cyclase to produce cAMP. cAMP goes on to inhibit any undue platelet activation (in order to promote circulation) and also counteracts any increase in cytosolic calcium levels which would result from thromboxane A2 (TXA2) binding (leading to platelet activation and subsequent coagulation). PGI2 also binds to endothelial prostacyclin receptors and in the same manner raise cAMP levels in the cytosol. This cAMP then goes on to activate protein kinase A (PKA). PKA then continues the cascade by phosphorylating and inhibiting myosin light-chain kinase which leads to smooth muscle relaxation and vasodilation. Notably, PGI2 and TXA2 work as physiological antagonists.
Symptoms of overdose are extensions of its dose-limiting pharmacologic effects and include flushing, headache, hypotension, nausea, vomiting, and diarrhea. Most events were self-limiting and resolved with reduction or withholding of epoprostenol. Single intravenous doses at 10 and 50 mg/kg (2703 and 27,027 times the recommended acute phase human dose based on body surface area) were lethal to mice and rats, respectively. Symptoms of acute toxicity were hypoactivity, ataxia, loss of righting reflex, deep slow breathing, and hypothermia.
(5Z,13e)-(15S)-6,9alpha-Epoxy-11alpha,15-dihydroxyprosta-5,13-dienoate | (5Z,9alpha,11alpha,13e,15S)-6,9-Epoxy-11,15-dihydroxyprosta-5,13-dien-1-oic acid | Epoprostenol | PGI2 | PGX | Prostacyclin | Prostaglandin I2 | Prostaglandin x | Vasocyclin | Epoprostenol |