TheraRadar
Data updated: May 26, 2026

BICILLIN C-R 900/300 (penicillin g benzathine)

Infectious Disease Approved 1953-05-18

BICILLIN C-R 900/300 is indicated for the treatment of Upper Respiratory Tract Infection; Scarlet Fever; Erysipelas; Skin and Soft Tissue Infection; Pneumonia; Otitis Media.

Source: FDA Label • KING PHARMS LLC

How BICILLIN C-R 900/300 Works

Penicillin G exerts bactericidal action against susceptible microorganisms during the stage of active multiplication. It acts by inhibiting the biosynthesis of cell-wall peptidoglycan, rendering the bacterial cell wall osmotically unstable, which results in bacterial cell death.

1
Indication
--
Phase 3 Trials
73
Years on Market

Details

Status
Prescription
First Approved
1953-05-18
Routes
INJECTION
Dosage Forms
INJECTABLE

BICILLIN C-R 900/300 Approval History

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Original
New Indication
New Form
Label Update
229 FDA actions from 1953 to 2020
Dec 2020 SUPPL
Label · Labeling
Dec 2020 SUPPL
Label · Labeling
Aug 2019 SUPPL
Label · Labeling

What BICILLIN C-R 900/300 Treats

6 indications

BICILLIN C-R 900/300 is approved for 6 conditions since its original approval in 1953. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Upper Respiratory Tract Infection
  • Scarlet Fever
  • Erysipelas
  • Skin and Soft Tissue Infection
  • Pneumonia
  • Otitis Media
Source: FDA Label

BICILLIN C-R 900/300 Boxed Warning

NOT FOR INTRAVENOUS USE. DO NOT INJECT INTRAVENOUSLY OR ADMIX WITH OTHER INTRAVENOUS SOLUTIONS. THERE HAVE BEEN REPORTS OF INADVERTENT INTRAVENOUS ADMINISTRATION OF PENICILLIN G BENZATHINE WHICH HAS BEEN ASSOCIATED WITH CARDIORESPIRATORY ARREST AND DEATH. Prior to administration of this drug, carefully read the WARNINGS , ADVERSE REACTIONS , and DOSAGE AND ADMINISTRATION sections of the labeling....

BICILLIN C-R 900/300 Competitive Set

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Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to BICILLIN C-R 900/300

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FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

PENICILLIN G PROCAINE
PENICILLIN G PROCAINE
6 shared
CONSOLIDATED PHARM
Shared indications:
Upper Respiratory Tract InfectionScarlet FeverErysipelas +3 more
ACHROMYCIN V
TETRACYCLINE HYDROCHLORIDE
2 shared
LEDERLE
Shared indications:
Upper Respiratory Tract InfectionSkin and Soft Tissue Infection
PENICILLIN-VK
PENICILLIN V POTASSIUM
2 shared
Teva
Shared indications:
Scarlet FeverErysipelas
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Clinical Trial Registry

1 trials
Trial Sponsor ID Phase Status Title
NCT03612557 B8441001 Ph 1 completed A Study of Benzathine Benzylpenicillin Intramuscular Injection in Japanese Healthy Subjects
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Active Pipeline

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Key Completed Trials

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

BICILLIN C-R 900/300 FDA Label Details

Indications & Usage

FDA Label (PDF)

BICILLIN C-R 900/300 is indicated for the treatment of Upper Respiratory Tract Infection; Scarlet Fever; Erysipelas; Skin and Soft Tissue Infection; Pneumonia; Otitis Media.

⚠️ BOXED WARNING

WARNING: NOT FOR INTRAVENOUS USE. DO NOT INJECT INTRAVENOUSLY OR ADMIX WITH OTHER INTRAVENOUS SOLUTIONS. THERE HAVE BEEN REPORTS OF INADVERTENT INTRAVENOUS ADMINISTRATION OF PENICILLIN G BENZATHINE WHICH HAS BEEN ASSOCIATED WITH CARDIORESPIRATORY ARREST AND DEATH. Prior to administration of this dru...

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.