Last Updated: May 14, 2026

CLINICAL TRIALS PROFILE FOR BICILLIN


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All Clinical Trials for BICILLIN

Trial ID Title Status Sponsor Phase Start Date Summary
NCT00031499 ↗ Azithromycin/Bicillin Syphilis Completed National Institute of Allergy and Infectious Diseases (NIAID) Phase 3 2000-06-01 The purpose of this study is to determine if azithromycin, a drug approved for treatment of other infections, is as effective for syphilis (a sexually transmitted disease) as the standard treatment. Approximately 600 healthy adults, who are HIV-negative, ages 18 to 55 years of age, with primary, secondary or early latent syphilis, will participate in this research study. Volunteers will be enrolled in 5 U.S. cities and in Madagascar. Participants will be chosen randomly (by chance) to receive 1 of 2 study drugs: benzathine penicillin given (2 shots in the buttocks) or 4 tablets of azithromycin. Subjects who report a history of a penicillin allergy will be given either 2.0 g of oral azithromycin or 100 mg doxycycline taken orally, twice a day for 14 days. Over 2 years, 10 visits will be required. Procedures will include blood samples, physical exams, and swabs of sores.
NCT00427609 ↗ Bicillin L-A vs Placebo for the Treatment of Chronic, Plaque-Type Psoriasis Unresponsive to Topical Medications Terminated University of Tennessee Phase 2 2007-01-01 The purpose of this study is to determine the efficacy for Bicillin L-A, administered intramuscularly in a dose of 2.4 million units every three (3) weeks, for the treatment of chronic, plaque-type psoriasis unresponsive to topical medications or when other systemic therapies are contraindicated.
NCT06391125 ↗ LIMIT Trial - Lidocaine With Intramuscular Injection of Benzathine Penicillin G for Treponema Pallidum Treatment RECRUITING Washington University School of Medicine PHASE3 2024-07-01 There is evidence to suggest that lidocaine can help reduce the pain associated with intramuscular injections of benzathine penicillin G (BPG) or Bicillin, used to treat syphilis infections. A study published in the Journal of Family Practice in 2001 compared the pain experienced during bicillin injections with and without the use of lidocaine. The study found that patients who received lidocaine injections before receiving bicillin reported significantly less pain compared to those who received bicillin injections without lidocaine. Per the International Union against Sexually Transmitted Infections (IUSTI) European Guidelines for syphilis management, lidocaine has been used as a diluent for BPG since 1998. In the United States (US), BPG often comes prepackaged and lidocaine is unable to be used as a diluent with the same ease as it is in Europe. In light of this, the investigators propose a randomized controlled trial of benzathine penicillin G with and without lidocaine to quantify any site pain reduction with lidocaine in patients being treated for syphilis. This study is a randomized, double blinded, placebo controlled trial. During this study, patients needing BPG treatment for syphilis will be screened for any penicillin allergies and consented to their participation. Each participant will receive 2 injections of BPG, 1.2 million units each (2x1.2 million units = 2.4 million units, the standard dose for syphilis treatment), as intramuscular injections, one in each gluteal muscle, with one of the injections randomly having 0.5ml of 1% lidocaine added while the other has 0.5 ml normal saline solution. The side of each injection will be randomized by the medical assistant (MA)/nurse filling the vials and the injecting MA will be blinded, as well as the study participant, as to which vial contains lidocaine and which contains normal saline. The participants will then be asked to rate their pain from 0-10 on each site of injection at 10 minutes post injection, then again at 24 hours after injection via email electronic survey (via RedCap). The differences in pain from the two injections will be compared and analyzed to see if lidocaine reduces pain associated with BPG injections compared to the control of normal saline added to BPG.
>Trial ID >Title >Status >Phase >Start Date >Summary

Clinical Trial Conditions for BICILLIN

Condition Name

Condition Name for BICILLIN
Intervention Trials
Benzathine Penicillin Adverse Reaction 1
Psoriasis 1
Syphilis 1
Syphilis Infection 1
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Condition MeSH

Condition MeSH for BICILLIN
Intervention Trials
Syphilis 2
Psoriasis 1
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Clinical Trial Locations for BICILLIN

Trials by Country

Trials by Country for BICILLIN
Location Trials
United States 7
Madagascar 3
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Trials by US State

Trials by US State for BICILLIN
Location Trials
Missouri 1
Tennessee 1
North Carolina 1
Maryland 1
Louisiana 1
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Clinical Trial Progress for BICILLIN

Clinical Trial Phase

Clinical Trial Phase for BICILLIN
Clinical Trial Phase Trials
PHASE3 1
Phase 3 1
Phase 2 1
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Clinical Trial Status

Clinical Trial Status for BICILLIN
Clinical Trial Phase Trials
Completed 1
RECRUITING 1
Terminated 1
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Clinical Trial Sponsors for BICILLIN

Sponsor Name

Sponsor Name for BICILLIN
Sponsor Trials
National Institute of Allergy and Infectious Diseases (NIAID) 1
University of Tennessee 1
Washington University School of Medicine 1
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Sponsor Type

Sponsor Type for BICILLIN
Sponsor Trials
Other 2
NIH 1
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