Famvir is a medication with the active ingredient famciclovir. It is also known by the name Famciclovir. Famvir is used to treat viral infections such as herpes zoster (shingles) and genital herpes.
The general pricing of Famvir is in the range of £3.88 – £4.85 for each pills. The amount and type of active ingredients (10 or 60 mg) determine its exact cost.
Famvir (generic name: famciclovir) is an antiviral medication utilized for the treatment of specific viral infections.
Famvir inhibits viral DNA polymerase, impairing viral replication. The active form, penciclovir, competes with deoxyguanosine triphosphate, thereby arresting viral DNA synthesis.
Famvir is prescribed for the management of herpes zoster (shingles), herpes simplex in immunocompromised patients, and recurrent genital herpes.
Famvir is available in tablet form: 125 mg, 250 mg, and 500 mg strengths. Dosage strength and duration depend on the specific condition being treated.
Take Famvir with or without food. Swallow the tablets whole with water. Adhere to prescribed schedules to maintain consistent therapeutic levels.
For herpes zoster: 500 mg every 8 hours for 7 days. For recurrent genital herpes: 125 mg twice daily for 5 days. For mucocutaneous herpes simplex: 500 mg twice daily for 7 days.
Dosage adjustments are required for patients with impaired renal function. Dosing schedules must be tailored based on creatinine clearance levels.
Famvir undergoes rapid absorption and conversion to penciclovir. Peak plasma concentrations occur within 1 to 2 hours post-administration. Renal excretion is the primary route of elimination.
Common side effects include headache, nausea, and diarrhea. Serious, yet rare, side effects include jaundice and acute kidney failure.
Famvir may interact with other medications metabolized by renal pathways. Co-administration with probenecid can increase penciclovir plasma concentrations.
The safety and efficacy of Famvir in pediatric patients have not been established. It is primarily used in adult patients with specified viral infections.
In elderly patients, increased monitoring for renal function is recommended due to the prevalent decline in renal function with age, influencing drug clearance.
Classified under Pregnancy Category B. Animal studies have shown no fetal risk, but there are no adequate, well-controlled studies in pregnant women.
Famvir is excreted in human milk. Consider the potential risks and benefits before administering to breastfeeding mothers.
Famvir is contraindicated in patients with hypersensitivity to famciclovir, penciclovir, or any component of the formulation.
In case of an overdose, initiate supportive measures and symptomatic treatment. Hemodialysis can be used to reduce circulating levels of the drug.
Store at 20°C to 25°C (68°F to 77°F). Keep the medication in its original container, tightly closed, and protect it from moisture and light.
If a dose is missed, take it as soon as possible. If it is near the time of the next dose, skip the missed dose. Do not double dose to catch up.
Regular kidney function tests are recommended during prolonged treatment. Monitor the patient for signs of renal impairment and adjust dosage accordingly.
Inform patients of the importance of adherence to prescribed regimens, recognizing side effects, and consulting healthcare providers for symptomatic concerns.
Famvir is the brand name; generic versions containing the same active ingredient, famciclovir, are also available and may offer cost advantages.