Product image of Ospen 1000 (Phenoxymethylpenicillin Potassium) supplied by GNH India

Ospen 1000

Active Ingredient:
Phenoxymethylpenicillin Potassium
Origin:
EU

Ospen 1000 (Phenoxymethylpenicillin Potassium)

Phenoxymethylpenicillin potassium, the active ingredient in Ospen 1000, is a penicillin-type antibiotic presented as a 1000 mg tablet for oral use. It treats susceptible bacterial infections in adults and children. GNH India supplies Ospen 1000 as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

GNH India supplies Ospen 1000 as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Manufacturer / TM Owner

Sandoz Gmbh

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Indications & Clinical Uses

Ospen 1000 (phenyl‑methylpenicillin potassium) is a narrow‑spectrum penicillin that acts on Gram‑positive bacteria causing acute infections.

  • Streptococcal pharyngitis: reduces symptom duration and bacterial spread.
  • Acute otitis media: eradicates the causative streptococcal organisms.
  • Skin and soft‑tissue infections (e.g., erythema multiforme): provides bacterial clearance.
  • Early Lyme disease (erythema migrans): eliminates Borrelia burgdorferi.
  • Prophylaxis after dental procedures in at‑risk patients: prevents bacterial endocarditis.
  • Rheumatic fever prophylaxis: suppresses recurrent streptococcal infection.

How It Works

  • Phenoxymethylpenicillin potassium inhibits bacterial cell‑wall synthesis by binding to penicillin‑binding proteins, blocking the transpeptidation step that cross‑links peptidoglycan strands. This results in a weakened cell wall that cannot withstand osmotic pressure, leading to bacterial lysis and death, particularly against susceptible Gram‑positive organisms.

Side Effects

Phenoxymethylpenicillin potassium is generally well tolerated, but adverse reactions can occur.

Common Side Effects

  • Nausea or upset stomach.
  • Diarrhea, sometimes mild.
  • Skin rash or mild urticaria.
  • Vaginal yeast infection (candidiasis).
  • Transient elevation of liver enzymes.

Serious or Rare Side Effects

  • Anaphylactic or severe allergic reactions.
  • Stevens‑Johnson syndrome or toxic epidermal necrolysis.
  • Hemolytic anemia.
  • Severe neutropenia or agranulocytosis.
  • Acute interstitial nephritis.
  • Clostridioides difficile‑associated colitis.

Precautions & Warnings

Before prescribing phenoxymethylpenicillin potassium, clinicians should consider several safety aspects.

  • Allergy assessment: verify no history of penicillin hypersensitivity.
  • Renal function: adjust dose in patients with significant impairment.
  • Hepatic function: monitor liver enzymes in patients with pre‑existing liver disease.
  • Pregnancy and lactation: use only if clearly needed, weighing benefits against risks.
  • Concomitant oral contraceptives: advise possible reduction in efficacy.
  • Store at below 25°C: keep in the original container, protect from moisture and direct sunlight.

Avoid Interactions

Phenoxymethylpenicillin potassium may interact with several medicines, requiring attention to avoid reduced efficacy or increased toxicity.

Major Interactions (Avoid)

  • Oral contraceptives: may reduce hormonal effectiveness, increasing pregnancy risk.
  • Methotrexate: enhanced toxicity due to reduced renal clearance.
  • Probenecid: increases penicillin plasma concentrations, raising toxicity risk.

Moderate Interactions (Monitor Closely)

  • Warfarin: potential alteration of INR, requiring closer monitoring.
  • Allopurinol: may increase risk of rash.
  • Non‑steroidal anti‑inflammatory drugs (NSAIDs): can affect renal function when combined with penicillins.

Frequently Asked Questions

Ospen 1000 contains phenoxymethylpenicillin potassium, a narrow‑spectrum penicillin used to treat susceptible Gram‑positive bacterial infections such as streptococcal throat infection, acute otitis media, skin infections and early Lyme disease, and it is also employed for prophylaxis in certain at‑risk patients.

The drug binds to penicillin‑binding proteins on bacterial cell walls, inhibiting the transpeptidation step of peptidoglycan synthesis. This weakens the cell wall, leading to osmotic lysis and death of susceptible Gram‑positive bacteria.

The prescribed dose of Ospen 1000 is determined by the treating clinician based on the infection type, severity, patient age, weight and renal function. Dosage regimens are not standardized in this description and should follow the prescriber’s instructions.

Phenoxymethylpenicillin potassium is classified as pregnancy‑category B in many regions, indicating no proven risk in animal studies, but human data are limited. It may be used during pregnancy or lactation only when clearly needed, after a risk‑benefit assessment by the healthcare provider.

To order Ospen 1000, submit an enquiry on the product page at gnhindia.com with the required quantity. GNH India supplies hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details and any necessary import documentation.

Ospen 1000 (phenoxymethylpenicillin potassium) is a narrow‑spectrum oral penicillin, offering targeted activity against Gram‑positive organisms with fewer effects on normal gut flora compared with broad‑spectrum agents like amoxicillin. This can reduce the risk of secondary infections such as Clostridioides difficile colitis.

Store Ospen 1000 tablets at temperatures below 25 °C in the original packaging, protecting them from moisture, heat and direct sunlight to maintain potency.

Ospen 1000 is supplied as an oral tablet and should be taken with water, usually with or without food as directed by the prescriber. Swallow the tablet whole; do not crush or split unless specifically advised.

The most serious risks include severe allergic reactions such as anaphylaxis, Stevens‑Johnson syndrome, hemolytic anemia, neutropenia, acute interstitial nephritis and Clostridioides difficile‑associated colitis. Immediate medical attention is required if any of these occur.

Patients with a documented hypersensitivity to phenoxymethylpenicillin, other penicillins or any β‑lactam antibiotics should avoid Ospen 1000. Caution is also advised for individuals with severe renal impairment, a history of severe drug reactions, or those taking interacting medications listed under major interactions.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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