Vylster

Valganciclovir is an L-valyl ester (prodrug) of ganciclovir, which after oral administration is rapidly converted to ganciclovir by intestinal and hepatic esterases. Ganciclovir is a synthetic analogue of 2’-deoxyguanosine, which inhibits replication of herpes viruses in vitro and in vivo. Sensitive human viruses include human cytomegalovirus (HCMV), herpes simplex virus-1 and -2 (HSV-1 and HSV-2), human herpes virus 6, 7 and 8 (HHV-6, HHV-7, HHV-8), Epstein-Barr virus (EBV), varicella-zoster virus (VZV) and hepatitis B virus.In CMV-infected cells ganciclovir is initially phosphorylated to ganciclovir mono-phosphate by the viral protein kinase, UL97. Further phosphorylation occurs by cellular kinases to produce ganciclovir triphosphate, which is then slowly metabolized intracellularly. This has been shown to occur in HSV- and HCMV-infected cells with half-lives of 18 and between 6 and 24 hours respectively after removal of extracellular ganciclovir. As phosphorylation is largely dependent on the viral kinase, the phosphorylation of ganciclovir occurs preferentially in virus-infected cells.The virustatic activity of ganciclovir is due to inhibition of viral DNA synthesis by: (a) competitive inhibition of incorporation of deoxyguanosine-triphosphate into DNA by viral DNA polymerase and (b) incorporation of ganciclovir triphosphate into viral DNA causing termination of, or very limited further viral DNA elongation. Typical antiviral IC 50 against CMV in vitro is in the range 0.08 μM (0.02 μg/ml) to 14 μM (3.5 μg/ml).The clinical antiviral effect of Valganciclovir has been demonstrated in the treatment of AIDS patients with newly diagnosed CMV retinitis (clinical trial WV15376). CMV shedding was decreased from 46% (32/69) of patients at study entry to 7% (4/55) of patients following 4 weeks of Valganciclovir treatment.

ব্যবহার

Vylsterপ্রাপ্ত ইমিউনোডেফিসিয়েন্সি সিন্ড্রোম (এইডস) প্রাপ্ত বয়স্ক রোগীদের মধ্যে সাইটোমেগালভাইরাস (সিএমভি) রেটিনাইটিসের চিকিৎসার জন্য নির্দেশিত হয়। Vylsterসিএমভি রোগ প্রতিরোধের জন্য প্রাপ্ত বয়স্ক এবং পেডিয়াট্রিক সলিড অর্গান ট্রান্সপ্ল্যান্ট (এসওটি) ঝুঁকিতে আক্রান্ত রোগীদের প্রতিরোধের জন্য নির্দেশিত হয়।

Vylster এর দাম কত? Vylster এর দাম

সুচিপত্র

• Vylster
• কাজ
• খাওয়ার নিয়ম
• পার্শ্বপ্রতিক্রিয়া
• সতর্কতা
• মিথস্ক্রিয়া
• গর্ভাবস্থাকালীন ব্যবহার
• তীব্র ওভারডোজ
• অন্যান্য ওষুধের সাথে প্রতিক্রিয়া
• বৈপরীত্য
• সংরক্ষণ

খাওয়ার নিয়ম / ব্যবহারের নিয়ম

Vylster খাওয়ার নিয়ম / ব্যবহারের নিয়ম

Standard Dosage: Valganciclovir is administered orally, and should be taken with food. Valganciclovir is rapidly and extensively converted into the active ingredient ganciclovir. The bioavailability of ganciclovir from Valganciclovir is up to 10-fold higher than from oral ganciclovir.The dosage and administration of Valganciclovir tablets or powder for oral solution as described below should be closely followed. The ganciclovir systemic exposure following administration of 900 mg Valganciclovir powder for oral solution is equivalent to a 900 mg Valganciclovir dose administered as two 450 mg tablets.An oral dosing dispenser with 25 mg graduations up to 500 mg is provided with the powder for oral solution. It is recommended that this dispenser is used to measure and administer the dose.

Treatment of cytomegalovirus (CMV) retinitis-

Adult patients

:

• Induction treatment of CMV retinitis: For patients with active CMV retinitis, the recommended dose is 900 mg twice a day for 21 days. Prolonged induction treatment may increase the risk of bone marrow toxicity
• Maintenance treatment of CMV retinitis: Following induction treatment, or in adult patients with inactive CMV retinitis, the recommended dose is 900 mg once daily. Patients whose retinitis worsens may repeat induction treatment. The duration of maintenance treatment should be determined on an individual basis.

Pediatric patients

: The safety and efficacy of Valganciclovir in the treatment of CMV retinitis have not been established in adequate and well-controlled clinical studies in pediatric patients.

Prevention of CMV disease in transplantation-

Adult patients

: For kidney transplant patients, the recommended dose is 900 mg once daily starting within 10 days post-transplantation and continuing until 200 days post-transplantation. For patients who have received a solid organ transplant other than kidney, the recommended dose is 900 mg once daily starting within 10 days post-transplantation and continuing until 100 days post-transplantation.

Pediatric patients

: In pediatric solid organ transplant patients from birth, who are at risk of developing CMV disease, the recommended once daily dose of Valganciclovir is based on body surface area (BSA) and creatinine clearance (ClCr) derived from Schwartz formula (ClCr), and is calculated using the equation below:Pediatric dose (mg)= 7 x BSA x ClCr. If the creatinine clearance exceeds 150 ml/min/1.73 m2, then a maximum value of 150 ml/min/1.73 m2

পার্শ্বপ্রতিক্রিয়া

The following serious adverse reactions are discussed in greater detail in other sections of the labeling:

• Hematologic Toxicity
• Acute Renal Failure
• Impairment of Fertility
• Fetal Toxicity
• Mutagenesis and Carcinogenesis

সতর্কতা

মিথস্ক্রিয়া

In vivo drug-drug interaction studies were not conducted with valganciclovir. However, because valganciclovir is rapidly and extensively converted to ganciclovir, drug-drug interactions associated with ganciclovir will be expected for Valganciclovir. Drug-drug interaction studies with ganciclovir were conducted in patients with normal renal function. Following concomitant administration of Valganciclovir and other renally excreted drugs, patients with impaired renal function may have increased concentrations of ganciclovir and the coadministered drug. Therefore, these patients should be closely monitored for toxicity of ganciclovir and the coadministered drug.

গর্ভাবস্থাকালীন ব্যবহার

Pregnancy: The safety of Valganciclovir for use in pregnant women has not been established. However, ganciclovir readily diffuses across the human placenta. The use of Valganciclovir should be avoided in pregnant women unless the benefit to the mother outweighs the potential risk to the fetus. Reprotoxicity studies have not been repeated with valganciclovir because of the rapid and extensive conversion to ganciclovir. In animal studies ganciclovir was associated with reproductive toxicity and teratogenicity (see section 3.3.4 Reproductive Toxicity). The safe use of Valganciclovir during labor and delivery has not been established.Lactation: Peri- and postnatal development has not been studied with valganciclovir or with ganciclovir but the possibility of ganciclovir being excreted in breast milk and causing serious adverse reactions in the nursing infant cannot be discounted. Human data are not available but animal data indicates that ganciclovir is excreted in the milk of lactating rats. Therefore, a decision should be made to discontinue the drug or discontinue nursing taking into consideration the potential benefit of Valganciclovir to the nursing mother.

বৈপরীত্য

Valganciclovir is contraindicated in patients with known hypersensitivity to valganciclovir, ganciclovir or to any of the excipients.

অতিরিক্ত সতর্কতা

Pediatric Use: A higher risk of hematological cytopenias in neonates and infants warrants careful monitoring of blood counts in these age groups. Monitoring of liver function abnormalities, renal function and gastrointestinal fluid loss is also recommended in pediatric patients.Geriatric Use: Safety and efficacy have not been established in this patient populationRenal Impairment: In patients with impaired renal function, dosage adjustments based on creatinine clearance are required.Hepatic Impairment: Safety and efficacy have not been established in this patient population

তীব্র ওভারডোজ

অন্যান্য ওষুধের সাথে প্রতিক্রিয়া

সংরক্ষণ

২০ ডিগ্রী সেলসিয়াস তাপমাত্রা হতে ২৫ ডিগ্রী সেলসিয়াস তাপমাত্রায় Vylsterট্যাবলেট গুলি সংরক্ষণ করুন । ১৫ থেকে ৩০ ডিগ্রী সেলসিয়াস তাপমাত্রায় পরিবহণ যোগ্য ।