allvir 250mg injection - Acyclovir (250mg) medicine

Allvir 250mg Injection - Uses, Price, Side Effects

4.5 (14 reviews)
Acyclovir (250mg)
๐Ÿญ Uniword Pharma ๐Ÿ“ฆ Varies by brand ๐Ÿ’Š Allopathy ๐Ÿ“… Updated: Aug 22, 2026
โš ๏ธ Hepatotoxicity Risk ๐Ÿ“‹ Prescription Required ๐Ÿ’Š Generic Available
Medically Reviewed
SaathiMed Expert Panel | Aug 22, 2026

What is allvir 250mg injection used for?

Allvir 250mg Injection contains Acyclovir, an antiviral medication used to treat infections caused by herpes viruses, including genital herpes, cold sores, shingles, and chickenpox. It works by stopping the virus from multiplying. It is administered intravenously under medical supervision.

  • Generic Name: Acyclovir
  • Manufacturer: Uniword Pharma
  • Form: Allopathy
  • Pregnancy Category: B
  • Prescription Required: Yes
๐Ÿ’ก Did You Know? The Indian pharmaceutical market is expected to reach $130 billion by 2030.

๐Ÿ’Š allvir 250mg injection Uses & Benefits

Herpes simplex infections (genital, oral, encephalitis), varicella-zoster (chickenpox, shingles).

Off-label uses: Herpes simplex prophylaxis in immunocompromised, EBV infection

๐Ÿ“‹ Drug Information

Generic Name(s)Acyclovir
Brand NameAcivir 400 DT Tablet
ManufacturerUniword Pharma
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassANTI INFECTIVES
Action ClassAntiviral (Non-HIV) drugs
Route of AdministrationOral
StorageStore at 20-25ยฐC (68-77ยฐF); protect from moisture.
Shelf LifeAs per manufacturer

๐Ÿ”ฌ Pharmacology (PK/PD)

Pharmacokinetics

AbsorptionAcyclovir is only partially absorbed from the gastrointestinal tract; oral bioavailability is 15-30%.
DistributionWidely distributed; crosses the blood-brain barrier and placenta; appears in breast milk.
Protein Binding9-33%
MetabolismHepatic; minor metabolism by aldehyde oxidase and alcohol dehydrogenase.
Half-Life2.5-3.3 hours (normal renal function); up to 20 hours in end-stage renal disease.
ExcretionRenal (62-90% as unchanged drug) via glomerular filtration and tubular secretion.
Bioavailability15-30%
Onset of ActionNot well defined; antiviral effect begins after conversion to active triphosphate.
Peak Plasma Time1.5-2 hours
Duration of ActionApproximately 8 hours (dosing interval dependent on renal function).

How It Works

Acyclovir is converted to acyclovir monophosphate by viral thymidine kinase, then to triphosphate by cellular kinases, which inhibits viral DNA polymerase and incorporates into viral DNA, causing chain termination.

Mechanism Steps

1Acyclovir enters virus-infected cells.
2Viral thymidine kinase converts acyclovir to acyclovir monophosphate.
3Cellular kinases convert monophosphate to diphosphate and triphosphate.

๐Ÿ’ก How to Take allvir 250mg injection

Follow your doctor's prescription exactly.

Dosage Timeline

๐ŸŒ… Morning โœ… โ˜€๏ธ Afternoon โŒ ๐ŸŒ† Evening โœ… ๐ŸŒ™ Night โŒ

โš ๏ธ Side Effects of allvir 250mg injection

โœ… Common Side Effects

  • Nausea
  • Diarrhea
  • Headache
  • Dizziness
  • Fatigue

๐Ÿšจ Serious Side Effects

  • Acute renal failure
  • Neurotoxicity (confusion, hallucinations, seizures)
  • Thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS)

โš ๏ธ Rare Side Effects

  • Hepatitis
  • Stevens-Johnson syndrome
  • Anaphylaxis
  • Leukopenia

Consult your doctor if you experience any unusual symptoms.

๐Ÿ”ฌ Drug Interactions

โš ๏ธ DrugSeverityEffect
Probenecid Moderate Increased acyclovir levels and toxicity risk
Mycophenolate mofetil Moderate Increased risk of nephrotoxicity
Interferon Minor Possible additive antiviral effect

๐Ÿšจ Major Interactions

  • Probenecid
  • Cimetidine
  • Mycophenolate mofetil

โšก Moderate Interactions

  • Tenofovir
  • Aminoglycosides
  • Cyclosporine
  • Tacrolimus

โ„น๏ธ Minor Interactions

  • Zidovudine
  • Interferon

๐Ÿฝ๏ธ Food Interactions

No significant food interactions; may be taken with or without food.

๐Ÿท Alcohol Interaction

No known interaction; however, alcohol may exacerbate side effects like dizziness.

๐Ÿ›ก๏ธ Safety & Warnings

Liver
Low
Kidney
Moderate
Heart
Low
Pregnancy
Category B

๐Ÿšซ Contraindications

Hypersensitivity to acyclovir or valacyclovir.

๐Ÿ“Š Monitoring Parameters

Renal function (especially in elderly or high-dose therapy); hydration status.

๐Ÿคฑ Lactation Safety

Caution; acyclovir is excreted in breast milk but considered compatible with breastfeeding.

๐Ÿ’Š Overdose Management

Supportive care; hemodialysis may enhance elimination.

โฐ Missed Dose

Take as soon as remembered; if near next dose, skip missed dose. Do not double dose.

๐Ÿ‘จโ€โš•๏ธ Reviewed by Expert

SaathiMed Expert Panel

MD, PhD - Pharmacology

Last reviewed on: Aug 22, 2026

๐Ÿ”— View Profile

๐Ÿ”„ Substitutes for allvir 250mg injection

View All

Alternative brands with exact same active ingredient (Acyclovir (250mg)):

Medical Note: Always consult your doctor before switching medications.

โญ User Reviews

Regular Customer Jul 10, 2026

Effective and reliable. Worked as expected.

Certified Buyer Jul 10, 2026

Effective and reliable. Worked as expected.

Happy Patient Jul 10, 2026

Helpful and effective medicine as per my experience. Always consult a doctor.

Certified Buyer Jul 10, 2026

Good quality medicine. Satisfied with the outcome.

Certified Buyer Jul 10, 2026

Good quality medicine. Satisfied with the outcome.

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