benzathine 1200000iu injection - Benzathine penicillin G (1200000IU) medicine

Benzathine 1200000IU Injection - Uses, Price, Side Effects

4.6 (17 reviews)
๐Ÿญ Karnataka Antibiotics & Pharmaceuticals Ltd ๐Ÿ“ฆ Varies by brand ๐Ÿ’Š Allopathy ๐Ÿ“… Updated: Aug 21, 2026
๐Ÿ“‹ Prescription Required ๐Ÿ’Š Generic Available
Medically Reviewed
SaathiMed Expert Panel | Aug 21, 2026

What is benzathine 1200000iu injection used for?

Benzathine 1200000IU Injection contains Benzathine penicillin G, a long-acting antibiotic used to treat infections like syphilis and to prevent rheumatic fever. It works by stopping bacterial cell wall synthesis, killing susceptible bacteria. It is given as an intramuscular injection, usually as a single dose for syphilis or monthly for prophylaxis.

  • Generic Name: Benzathine penicillin G
  • Manufacturer: Karnataka Antibiotics & Pharmaceuticals Ltd
  • 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 benzathine 1200000iu injection Uses & Benefits

Syphilis (primary, secondary, latent, tertiary), rheumatic fever prophylaxis, streptococcal infections

Off-label uses: Yaws, pinta, bejel, leptospirosis

๐Ÿ“‹ Drug Information

Generic Name(s)Benzathine penicillin G
Brand NameBenzathine 1200000IU Injection
ManufacturerKarnataka Antibiotics & Pharmaceuticals Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassANTI INFECTIVES
Action ClassCell wall active agent - Narrow spectrum Penicillin
Route of AdministrationIntramuscular (deep IM)
StorageStore at 2-8ยฐC; do not freeze
Shelf LifeAs per manufacturer

๐Ÿ”ฌ Pharmacology (PK/PD)

Pharmacokinetics

AbsorptionSlowly absorbed from intramuscular injection site
DistributionWidely distributed; low penetration into CSF unless inflamed meninges
Protein Binding60-90%
MetabolismMinimal hepatic metabolism
Half-Life3-5 days (prolonged due to slow release)
ExcretionRenal (unchanged)
Bioavailability100% (IM)
Onset of ActionSlow (24-48 hours)
Peak Plasma Time12-24 hours
Duration of Action2-4 weeks

How It Works

Inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs)

Mechanism Steps

1Benzathine penicillin G dissociates slowly at injection site, releasing penicillin G
2Penicillin G binds to penicillin-binding proteins (PBPs) on bacterial cell wall
3Inhibits transpeptidase activity, preventing cross-linking of peptidoglycan chains

๐Ÿ’ก How to Take benzathine 1200000iu injection

Follow your doctor's prescription exactly.

Dosage Timeline

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

โš ๏ธ Side Effects of benzathine 1200000iu injection

โœ… Common Side Effects

  • Pain at injection site
  • Nausea
  • Diarrhea
  • Rash

๐Ÿšจ Serious Side Effects

  • Anaphylaxis
  • Stevens-Johnson syndrome
  • Hemolytic anemia
  • Interstitial nephritis

โš ๏ธ Rare Side Effects

  • Pseudomembranous colitis
  • Seizures (high doses)
  • Jarisch-Herxheimer reaction

Consult your doctor if you experience any unusual symptoms.

๐Ÿ”ฌ Drug Interactions

โš ๏ธ DrugSeverityEffect
Methotrexate Major Increased methotrexate toxicity
Warfarin Major Increased bleeding risk
Oral typhoid vaccine Major Reduced vaccine efficacy
Probenecid Moderate Increased penicillin levels
Heparin Moderate Increased risk of bleeding
Live bacterial vaccines Moderate Reduced vaccine efficacy
Oral contraceptives Minor Reduced contraceptive efficacy
Disulfiram Minor Possible disulfiram-like reaction

๐Ÿšจ Major Interactions

  • Methotrexate
  • Warfarin
  • Oral typhoid vaccine

โšก Moderate Interactions

  • Probenecid
  • Heparin
  • Live bacterial vaccines

โ„น๏ธ Minor Interactions

  • Oral contraceptives
  • Disulfiram

๐Ÿฝ๏ธ Food Interactions

None known

๐Ÿท Alcohol Interaction

No significant interaction

๐Ÿ›ก๏ธ Safety & Warnings

Liver
Low
Kidney
Low
Heart
Low
Pregnancy
Category B

๐Ÿšซ Contraindications

Hypersensitivity to penicillins, cephalosporins, or any component

๐Ÿ“Š Monitoring Parameters

Renal function, CBC, signs of hypersensitivity

๐Ÿคฑ Lactation Safety

Safe; excreted in low amounts

๐Ÿ’Š Overdose Management

Supportive care; hemodialysis may remove drug

โฐ Missed Dose

Administer as soon as possible; do not double dose

๐Ÿ‘จโ€โš•๏ธ Reviewed by Expert

SaathiMed Expert Panel

MD, PhD - Pharmacology

Last reviewed on: Aug 21, 2026

๐Ÿ”— View Profile

๐Ÿ”„ Substitutes for benzathine 1200000iu injection

View All

Alternative brands with exact same active ingredient (Benzathine penicillin G (1200000IU)):

Medical Note: Always consult your doctor before switching medications.

โญ User Reviews

Regular Customer Jul 10, 2026

Effective and reliable. Worked as expected.

Happy Patient Jul 10, 2026

Good quality medicine. Satisfied with the outcome.

Regular Customer Jul 10, 2026

Good quality medicine. Satisfied with the outcome.

Regular Customer Jul 10, 2026

Effective and reliable. Worked as expected.

Certified Buyer Jul 10, 2026

Found this to be a helpful product. Good results.

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