Famvir (Famciclovir) is an anti viral Drug, more specifically a pro-drug widely used for the treatment of various type of Herpes virus Infections, especially for Herpes Zoster (shingles and chicken pox). Famvir (Famciclovir) is a pro-drug of Penciclovir, which is a nucleobase and an agent that prevents the replication of viral DNA that is necessary for a virus to multiply. Though, Penciclovir exhibits low toxicity and good selectivity, it is poorly absorbed when given orally. Famvir (Famciclovir) is its improved oral bio-available form. After oral administration, Famvir converts into Penciclovir and take part an active role against the viruses. The IUPAC (systematic chemical name) name of Famvir is 2-[(acetyloxy) methyl]-4-(2-amino-9H-purin-9-yl) butyl acetate.
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What are the general prescribed uses for Famvir?
Oral anti viral medication Famvir is prescribed for the following clinical use
- Treatment for Herpes Simplex virus 1 and 2 (genital herpes and herpes zoster)
- Treatment of recurrent genital herpes
- Treatment of recurrent genital herpes for HIV infected patient
- Treatment of herpes zoster (shingle and chicken pox)
- Treatment of cold sores and recurrent herpes labialis
The medication should be started as early as possible after development of any symptom and diagnosis of herpes infection.
Recommended Dosage for Generic Famciclovir Famvir
The dosage depends upon the disease, kidney function, other medical conditions of the patient and the response to therapy by the patient.
Some of the popular
dosages for common uses of Famvir are:
- For recurrent genital herpes infection - 1000mg Famvir twice daily
- For recurrent cold sores - 1500mg Famvir as a single large dose
- For suppression of recurrent genital herpes – 250mg Famvir twice daily maximum up to 1 year
- For herpes zoster (shingle and chicken pox) – 500mg Famvir thrice daily (every 8 hour) X 7days
- For HIV infected patients (cold sores and genital herpes infection) – 500mg twice daily for 5-10 days
Interaction for drug Famvir in body
Probenecid (benemid) interacts With Famvir to reduce the function of kidney causing increase of concentration of Famvir in blood and hence may lead to serious side effect. Some other drugs including over the counter drugs, vitamins, minerals may interact with Famvir and can enhance the adverse effects. Medical consultation is required before taking Famvir if any one uses other medications.
Precautions for Famvir medicine
Famvir should not be taken if the patient is allergic to Penciclovir or denavir. Dose adjustments may be necessary for the patients having kidney disease, galactose intolerance, glucose-galactose malabsorption or severe lactase deficiency. Medical consultation is required for pregnant or breast feeding women before taking Famvir.
Side Effects for Famvir tablets
Serious but rarely observed side effects of Famvir include neutropenia (reduction of white blood cell count) and thrombocytopenia (reduction of platelet count). Following are the commonly known side effects of Famvir-
- Nausea
- Vomiting
- Headache
- Fatigue
- Flatulence
- Dizziness
- Mild itching or rash
More Information About Famvir pills
- Famvir should be taken with a full glass of water.
- Plenty of water should be consumed while taking the medication to maintain proper kidney function.
- Famvir taken with food may decrease stomach upset.
- A full course of medication as prescribed by the medical practitioner is essential, though, before completing the course, the symptoms of the infection are diminished.
- A missed dose should be taken as soon as it is remembered. If it is almost the time for the next dose it should be skipped and scheduled dose should be taken.
- Ask emergency medical help for overdose of Famvir.
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