Nhận Dạng Quốc Tế & Đặc Tính Hóa Học
								
																		
									
																											
																		
									
																											
																		
									
										
											Monoisotopic mass 
										
										
											125.971809718										
									 
																											
									
																		
									
										
											InChI 
										
										
											InChI=1S/CH3O5P/c2-1(3)7(4,5)6/h(H,2,3)(H2,4,5,6)										
									 
																		
																		
										
											InChI Key 
										
										
											InChIKey=ZJAOAACCNHFJAH-UHFFFAOYSA-N										
									 
																											
																		
										
											IUPAC Name 
										
										
											phosphonoformic acid										
									 
																											
																		
										
											Traditional IUPAC Name 
										
										
											foscarnet										
									 
																											
									
																		
																		
																		
									
																		
																		
																		
																		
																		
																											
																		
																											
																		
																											
																		
										
											pKa (strongest acidic) 
										
										
											-0.096										
									 
																											
																		
																		
																											
																		
										
											Refractivity 
										
										
											19.07 m3·mol-1
										
									 
																			  
		  
																		
																											
																		
																		
									
																		
																		
																		
																		
																		
																		
																		
											  
		  
								 
							 	
														
															
								 Dược Lực Học : 
								
									Foscarnet is an organic analogue of inorganic pyrophosphate that inhibits replication of herpes viruses in vitro including cytomegalovirus (CMV) and herpes simplex virus types 1 and 2 (HSV-1 and HSV-2). Foscarnet does not require activation (phosphorylation) by thymidine kinase or other kinases and therefore is active in vitro against HSV TK deficient mutants and CMV UL97 mutants. Thus, HSV strains resistant to acyclovir or CMV strains resistant to ganciclovir may be sensitive to foscarnet. However, acyclovir or ganciclovir resistant mutants with alterations in the viral DNA polymerase may be resistant to foscarnet and may not respond to therapy with foscarnet. The combination of foscarnet and ganciclovir has been shown to have enhanced activity in vitro.									
							
														
															
								 Cơ Chế Tác Dụng : 
								
									An antiviral agent used in the treatment of cytomegalovirus retinitis. Foscarnet also shows activity against human herpesviruses and HIV. [PubChem]								
								
									Foscarnet exerts its antiviral activity by a selective inhibition at the pyrophosphate binding site on virus-specific DNA polymerases at concentrations that do not affect cellular DNA polymerases.								
							
														
															
								 Dược Động Học  : 
								
									▧ Absorption : 
Poorly absorbed after oral administration (bioavailability from 12 to 22%).
▧ Protein binding : 
14-17%
▧ Metabolism : 
Not metabolized.
▧ Half Life : 
3.3-6.8 hours
▧ Clearance : 
* 2.13 +/- 0.71 mL/min/kg [patients had normal renal function (CrCl > 80 mL/min]
* 68 +/- 8 mL/min/kg [CrCl was 50-80 mL/min]
* 34 +/- 9 mL/min/kg [CrCl was 25-49 mL/min]
* 20 +/- 4 mL/min/kg [CrCl was 10 - 24 mL/min]								
	
							 
														
														
								 Độc Tính : 
								
									Oral, rat LD50: >2,000 mg/kg. Signs of overdose include renal impairment.									
							
														
							
																					
								 Chỉ Định : 
								
									For the treatment of CMV retinitis in patients with acquired immunodeficiency syndrome (AIDS) and for treatment of acyclovir-resistant mucocutaneous HSV infections in immunocompromised patients.								
							
	
														
									
							
							
								 Tương Tác Thuốc : 
																
																		
									- 
										Artemether
										
											Additive QTc-prolongation may occur. Concomitant therapy should be avoided.										
									
- 
										Ciprofloxacin
										
											Increased risk of convulsions										
									
- 
										Cyclosporine
										
											Monitor for nephrotoxicity										
									
- 
										Lumefantrine
										
											Additive QTc-prolongation may occur. Concomitant therapy should be avoided. 										
									
- 
										Norfloxacin
										
											Increased risk of convulsions										
									
- 
										Ofloxacin
										
											Increased risk of convulsions										
									
- 
										Quinupristin
										
											This combination presents an increased risk of toxicity										
									
- 
										Tacrolimus
										
											Additive QTc-prolongation may occur increasing the risk of serious ventricular arrhythmias. Concomitant therapy should be used with caution.										
									
- 
										Thiothixene
										
											May cause additive QTc-prolonging effects. Increased risk of ventricular arrhythmias. Consider alternate therapy. Thorough risk:benefit assessment is required prior to co-administration. 										
									
- 
										Toremifene
										
											Additive QTc-prolongation may occur, increasing the risk of serious ventricular arrhythmias. Consider alternate therapy. A thorough risk:benefit assessment is required prior to co-administration.										
									
- 
										Trimipramine
										
											Additive QTc-prolongation may occur, increasing the risk of serious ventricular arrhythmias. Concomitant therapy should be used with caution. 										
									
- 
										Voriconazole
										
											Additive QTc prolongation may occur. Consider alternate therapy or monitor for QTc prolongation as this can lead to Torsade de Pointes (TdP).										
									
- 
										Vorinostat
										
											Additive QTc prolongation may occur. Consider alternate therapy or monitor for QTc prolongation as this can lead to Torsade de Pointes (TdP).										
									
- 
										Ziprasidone
										
											Additive QTc-prolonging effects may increase the risk of severe arrhythmias. Concomitant therapy is contraindicated.										
									
- 
										Zuclopenthixol
										
											Additive QTc prolongation may occur. Consider alternate therapy or use caution and monitor for QTc prolongation as this can lead to Torsade de Pointes (TdP).										
									
 								
							
							
							
							
								
								 Liều Lượng & Cách Dùng : 
								
									Injection, solution - Intravenous drip								
							
	
							
														
														
							
															
							
							
														
							
						
							
																													
								 Tài Liệu Tham Khảo Thêm 
								
																		
																		
																		
																		
																		
																		
										
											National Drug Code Directory