Virovir 500mg
Available Dosages
| Description | |
|---|---|
| SKU | 414 |
| Generic For | Famvir |
| Strength | 500mg |
| Manufacturer | FDC |
| Active Ingredient | Famciclovir |
| Pack Size | Qty | Price Per Pill or Unit | Price | Cart | |
|---|---|---|---|---|---|
| 30 Tablet/s | US$ 4.22 | US$ 126.50 | |||
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| 60 Tablet/s | US$ 4.22 | US$ 253.01 | |||
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| 90 Tablet/s | US$ 3.37 | US$ 303.6020%US$ 379.51 | |||
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Virovir 500mg (Famciclovir) – Affordable Famvir Alternative
Virovir 500 mg is an antiviral medication used to treat recurrent outbreaks of cold sores in adults who have a healthy immune system (the body system that fight against harmful viruses, bacteria, and fungi). It is a prodrug of penciclovir, a nucleoside analog DNA polymerase. Famciclovir is currently approved by the Food and Drug Administration (FDA) for the treatment of herpes simplex virus and varicella zoster infections. Each Virovir tablets contains Famciclovir as an active medicinal substance.
What is Virovir 500 mg (Famciclovir) used for?
Virovir 500 mg is used to treat:
Immunocompetent Adult Patients
- Cold sores, and inflamed blister in the mouth, caused by infection with the herpes simplex virus.
- Herpes genitalis or Genital herpes
- Herpes zoster (shingles).
- HIV-infected Adults
- Genital herpes
- Oralabial herpes (an infection caused by herpes simplex virus). It occurs on the lip.
How does Virovir 500 mg work?
Virovir 500 mg works by stopping the virus from multiplying and shortens the time the virus is released and spread, which helps to heal
What medications interact with Virovir?
The following medicines should be avoided, in case doctor recommends you Virovir (Famciclovir) to avoid possible drug interactions.
- Valganciclovir or Ganciclovir
- Acyclovir
- Valacyclovir
- Probenecid
- Raloxifene
Precautions
Tell the doctor before consuming Virovir:
- If you are hypersensitive to the Virovir(Famciclovir), or its components
- If you have liver or kidney problems
- If you are allergic to substances like dyes, food and preservatives
- If you have a weak immune system, HIV, or AIDS
- If you have glucose-galactose malabsorption or galactose intolerance
- If you can not tolerate lactose
- If you are pregnant or intending to become pregnant. You need to discuss the benefits and risks of consuming Virovir tablets during pregnancy. Breastfeeding women are advised not to take Virovir as it may pass into breast milk and harm the nursing baby
- The drug may cause dizziness. Do not drive or use machinery, while consuming Famciclovir as these activities may require a high degree of mental attention
How should Virovir 500 mg be taken?
- Virovir 500 mg comes in the form of tablets. Take the tablet with or without food. Swallow the Virovir tablet with a glass of water.
- Try to take the tablet at the same time each day.
- The treatment regimen is given below:
Dosage for Immunocompetent Adults
Recommended dose for Cold sores (herpes labialis) is 1500 mg
Recommended dose for Herpes genitalis
- To treat recurrent episodes is 1000 mg two times daily, for 1 day
- Suppressive therapy is 250 mg two times daily
Recommended dose for Herpes zoster (shingles) is 500 mg every 8 hours, for 7 days
Dosage for HIV-infected Adults
Oralabial or genital herpes is 500 mg two times daily, for 7 days
- Take the tablet exactly as prescribed by the doctor. Do not alter the dosage plan.
- Overdose: Seek medical attention immediately, in the case of an overdose of Famciclovir.
Missed dose of Virovir 500 mg
If you have forgotten a dose, take it as soon you remember and go back to your usual dosing schedule. If the time to take the next dose is near, leave the forgotten dose and take the next dose. Do not double up the dose to compensate the missed one.
- Take the tablet for as long as your doctor recommended.
What are the side effects of Virovir 500 mg?
Like other medicines, Virovir may cause adverse effects. Seek medical attention, in case the following troubles arise:
- Headache
- Nausea
- Diarrhea
Some adverse effects of Virovir 500 mg can be serious. Visit the doctor immediately, in the following situations.
- Yellowing eyes and skin
- Hallucinations
- Confusion
- Drowsiness
- Agitation
- Shortness of breath
- Weakness
- Weight gain
- Dizziness
- Itching or swelling of the face, tongue and throat
- Fluttering in your chest
- Loss of appetite
- Pounding heartbeats
- Trouble breathing
- Rash
- Change of urine
- Easy bruising/bleeding
What is Virovir 500mg used for?
Virovir 500mg contains famciclovir 500mg — the higher-strength tablet used for herpes zoster (shingles) and more intensive herpes simplex management. Primary indications: herpes zoster in immunocompetent adults (500mg three times daily for 7 days — most effective within 72 hours of rash onset); herpes simplex in immunocompromised patients (500mg twice daily for 7 days); and herpes labialis one-day treatment (1,500mg as a single dose — three 500mg tablets). Famciclovir 500mg for shingles is a preferred regimen in many guidelines due to simpler three-times-daily dosing vs. acyclovir's five-times-daily requirement.
Why is Virovir 500mg preferred over acyclovir for shingles?
Famciclovir 500mg three times daily provides equivalent antiviral efficacy to acyclovir 800mg five times daily for herpes zoster — with significantly simpler dosing. Clinical trials (including the Shingles Prevention Study era comparators) show equivalent rash healing, viral shedding reduction, and post-herpetic neuralgia prevention rates. The practical advantage is substantial: three vs. five daily doses improves adherence, particularly important in elderly shingles patients who already manage multiple medications. Valacyclovir 1,000mg TID (also three times daily) is similarly preferred over acyclovir for the same reason.
How should Virovir 500mg be taken for herpes zoster?
Virovir 500mg for shingles: one tablet three times daily for 7 days. Start within 72 hours of rash onset for maximum benefit — earlier treatment produces better outcomes. Take with or without food. Drink adequate fluids daily (1.5–2 litres). Complete the full 7-day course even if rash appears to be resolving. In immunocompromised patients (HIV, organ transplant, immunosuppressive therapy), IV acyclovir is initially preferred for moderate-to-severe zoster, transitioning to oral famciclovir 500mg TID when tolerated and improving. For ophthalmic zoster (rash near/in eye), urgent ophthalmological assessment is required alongside antiviral therapy.
What is ophthalmic (ocular) zoster and how does Virovir 500mg help?
Herpes zoster ophthalmicus (HZO) affects the ophthalmic division of the trigeminal nerve — causing rash on the forehead, around the eye, and potentially involving the eye itself (cornea, iris, retina, optic nerve). HZO can cause corneal scarring, uveitis, glaucoma, and permanent vision loss. Famciclovir 500mg TID (or valacyclovir 1,000mg TID) for 7 days is first-line oral antiviral therapy for HZO — initiated urgently upon diagnosis. Reduces viral load in ophthalmic tissues, decreasing risk of corneal involvement and other ocular complications. Immediate ophthalmology referral alongside antiviral therapy is mandatory.
Is Virovir 500mg safe in elderly patients with shingles?
Famciclovir 500mg TID is generally well tolerated in elderly patients — the most common shingles demographic. Renal function must be assessed first: eGFR 40–59 — reduce to 500mg BID; eGFR 20–39 — reduce to 500mg once daily; eGFR <20 — 250mg once daily; dialysis — 250mg after each session. Adequate hydration (1.5–2 litres/day) is important in elderly patients who may underdrink. The three-times-daily schedule (vs. acyclovir's five times daily) is particularly advantageous in elderly patients managing complex medication regimens. PHN prevention is the primary goal — early treatment within 72 hours is critical.
What drug interactions are important with Virovir 500mg?
At 500mg, the same interactions as 250mg apply — with greater potential significance given higher dose. Probenecid and cimetidine reduce penciclovir renal clearance — monitor for increased side effects at higher doses. Nephrotoxic agents (NSAIDs, aminoglycosides) add to renal penciclovir accumulation risk in patients with impaired renal function. Allopurinol theoretically affects famciclovir-to-penciclovir conversion. No significant hepatic CYP450 interactions — famciclovir has minimal interaction burden compared to many antivirals, making it safe to co-administer with most common medications including antihypertensives, antidiabetics, and analgesics.
How does Virovir 500mg compare to valacyclovir 1000mg for shingles?
Virovir 500mg (acyclovir) and valacyclovir 1000mg are both antiviral medicines used to treat shingles. Valacyclovir is converted into acyclovir in the body but is absorbed better, allowing it to work longer and require fewer daily doses. Because of this, valacyclovir is often more convenient and may provide better symptom control for some patients. Acyclovir is still effective but usually needs to be taken more frequently throughout the day. Both medicines help reduce pain, shorten healing time, and limit complications when started early.
Is Virovir 500mg equivalent to Famvir 500mg?
Yes. Virovir 500mg and branded Famvir 500mg both contain famciclovir 500mg in bioequivalent formulations. Virovir is the generic alternative providing the same antiviral efficacy for shingles and HSV treatment as branded Famvir at significantly lower cost.
Where can I buy Virovir 500mg online?
Virovir 500mg is available at PremiumRxDrugs.com, shipping to the USA, UK, Australia, and worldwide. Their licensed pharmacy provides authentic manufacturer-sourced famciclovir at competitive prices. Free shipping on qualifying orders, discreet delivery, and easy prescription management make shingles treatment accessible.
Can I order Virovir 500mg from PremiumRxDrugs for international delivery?
Yes. PremiumRxDrugs.com ships Virovir 500mg to the USA, UK, Australia, and many other countries. Their genuine manufacturer-verified antiviral medications, competitive pricing, and free worldwide shipping on qualifying orders make them a reliable international pharmacy for famciclovir shingles therapy.
What side effects does Virovir 500mg cause?
At 500mg TID (shingles dose), famciclovir remains very well tolerated. Headache and nausea are the most common — typically mild. Dizziness may occur. In elderly patients with unrecognised renal impairment, penciclovir accumulation can cause confusion and neurological symptoms — check renal function before prescribing and ensure dose adjustment. Rarely: hallucinations, urticaria, and elevated LFTs. Famciclovir lacks the crystalluria risk associated with high-dose acyclovir. PHN pain (occurring after the antiviral course) is not a famciclovir side effect — it is a complication of the zoster infection itself managed with tricyclic antidepressants, pregabalin, or gabapentin.
What can be done to prevent post-herpetic neuralgia when taking Virovir 500mg for shingles?
Starting Virovir 500mg within 72 hours of rash onset reduces PHN risk by approximately 50%. Additional PHN prevention measures: some guidelines add a tapering corticosteroid course (prednisolone 60mg tapering over 3 weeks) in otherwise healthy adults with severe acute pain — reduces acute pain duration but does not provide additional PHN benefit beyond antiviral. For established PHN prevention: early neuropathic pain assessment at week 4 after rash healing; initiate pregabalin or amitriptyline early if PHN is developing. Vaccination with shingles vaccine (Shingrix — 2-dose recombinant subunit) prevents shingles and PHN in people over 50 — recommended before any future zoster epiSodiume.
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