Product image of Lentocilin S 1200 (Benzathine Benzylpenicillin) supplied by GNH India

Lentocilin S 1200

Active Ingredient:
Benzathine Benzylpenicillin
Origin:
EU

Lentocilin S 1200 (Benzathine Benzylpenicillin)

Benzathine benzylpenicillin, the active ingredient in Lentocilin S 1200, is a penicillin (beta‑lactam antibiotic) presented as an intramuscular injection for use in bacterial infections. It is employed to treat susceptible streptococcal infections, syphilis and to prevent rheumatic fever in patients requiring long‑acting penicillin therapy.

GNH India supplies Lentocilin S 1200 as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals worldwide.

Manufacturer / TM Owner

Laboratórios Atral, S.A.

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Indications & Clinical Uses

Lentocilin S 1200 is a long‑acting penicillin used to treat infections caused by penicillin‑sensitive bacteria.

  • Streptococcal infections: eradicates susceptible streptococci and resolves symptoms.
  • Syphilis (early and late stages): provides sustained bactericidal concentrations to cure infection.
  • Prophylaxis of rheumatic fever: prevents recurrence after a streptococcal episode.
  • Other penicillin‑sensitive infections: treats a range of bacterial diseases responsive to benzathine penicillin.

How It Works

  • Benzathine benzylpenicillin binds to penicillin‑binding proteins on the bacterial cell wall, inhibiting the final transpeptidation step of peptidoglycan synthesis. This disruption weakens the wall, leading to osmotic instability and bacterial cell lysis, particularly against actively dividing, penicillin‑sensitive organisms.

Side Effects

Common Side Effects

  • Pain or swelling at the injection site.
  • Mild rash or itching.
  • Low‑grade fever.
  • Nausea.

Serious or Rare Side Effects

  • Anaphylactic reaction: difficulty breathing, hypotension, urticaria.
  • Severe neutropenia or agranulocytosis.
  • Serum sickness‑like reaction: fever, arthralgia, rash.
  • Stevens‑Johnson syndrome or toxic epidermal necrolysis.
  • Acute hemolytic anemia in susceptible individuals.

Precautions & Warnings

Before administering Lentocilin S 1200, consider the following precautions.

  • Allergy assessment: confirm no known hypersensitivity to penicillins.
  • Renal function: evaluate in patients with impaired kidney function.
  • Pregnancy: use only when benefits outweigh potential risks.
  • Concurrent antibiotics: avoid overlapping beta‑lactam therapy unless indicated.
  • Administration technique: inject deep intramuscularly, rotate sites to reduce tissue injury.
  • Store at ambient temperature: keep in original packaging, protect from moisture and light.

Avoid Interactions

Lentocilin S 1200 may interact with several medicines; monitor patients accordingly.

Major Interactions (Avoid)

  • Methotrexate: increased toxicity risk.
  • Oral anticoagulants (e.g., warfarin): heightened bleeding tendency.
  • Live vaccines: reduced efficacy of immunisation.

Moderate Interactions (Monitor Closely)

  • Allopurinol: possible rash enhancement.
  • Oral contraceptives: decreased hormonal effectiveness.
  • Probenecid: may raise penicillin plasma levels, requiring dose adjustment.

Frequently Asked Questions

Lentocilin S 1200 contains benzathine benzylpenicillin, a long‑acting penicillin used to treat susceptible streptococcal infections, early and late syphilis, and to provide prophylaxis against rheumatic fever. It is also effective for other infections caused by penicillin‑sensitive bacteria.

Benzathine benzylpenicillin inhibits bacterial cell‑wall synthesis by binding to penicillin‑binding proteins, preventing the cross‑linking of peptidoglycan strands. This leads to weakened cell walls, osmotic instability and ultimately bacterial lysis, especially in actively dividing, penicillin‑sensitive organisms.

The dosage of Lentocilin S 1200 is determined by the prescribing clinician based on the specific infection, patient weight, age, renal function and treatment guidelines. Only a qualified healthcare professional should set the dose and administration schedule.

Safety data for benzathine benzylpenicillin in pregnancy and lactation are limited. It should be used only when the potential benefit justifies any possible risk to the fetus or infant, and the decision must be made by the treating physician.

To place an order, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including cold‑chain if needed) and import documentation.

Lentocilin S 1200 provides a long‑acting intramuscular depot of benzathine benzylpenicillin, offering prolonged therapeutic levels with a single injection, unlike short‑acting penicillins that require multiple daily doses. This makes it convenient for syphilis treatment and rheumatic fever prophylaxis, though it shares the same allergy profile as other penicillins.

Store Lentocilin S 1200 at ambient temperature, below 25 °C, in its original packaging. Protect the product from moisture, direct sunlight and extreme temperatures to maintain potency and sterility.

Lentocilin S 1200 is given by deep intramuscular injection, typically into the gluteal muscle. The injection should be performed by a qualified healthcare professional using aseptic technique and rotating injection sites when multiple doses are required.

The most serious risks include anaphylactic reactions, severe neutropenia or agranulocytosis, serum‑sickness‑like reactions, and rare severe skin disorders such as Stevens‑Johnson syndrome. Immediate medical attention is required if any of these symptoms occur.

Patients with a known hypersensitivity to any penicillin or beta‑lactam antibiotic should avoid Lentocilin S 1200. It is also contraindicated in individuals with a history of severe allergic reactions to penicillins or those who have experienced anaphylaxis after prior penicillin exposure.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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