Bicillin L-A®

Cross-posted from: CDC

Priority Actions Following Recall

Dear Colleagues,

July 18, 2025

CDC has been alerted of a new voluntary recallExit Disclaimer (PDF, 1.16MB) by King Pharmaceuticals LLC., a subsidiary of Pfizer, of specific referenced lots of Bicillin® L-A (Penicillin G Benzathine Injectable Suspension). Penicillin is the only recommended treatment for pregnant women and babies with congenital syphilis. Considering this recall and high levels of syphilis diagnoses in the United States, we anticipate a limited supply of Bicillin® L-A. Given this information, we recommend that jurisdictions strongly consider preserving Bicillin® L-A for treating patients who are pregnant until we learn more about the impact of the recall given the dynamic nature of the situation.

Pfizer is initiating this recall due to particulates identified during visual inspection. The lots included are listed below this e-mail. Pfizer is still working to determine the impact of the recall on their production timeline.

Pfizer has completed a Health Hazard Assessment which indicatedExit Disclaimer (PDF, 1.16MB) that the potential risk to patients from use of the impacted product is medium. To date, we are not aware of any adverse events associated with this issue and there is no indication at this time of reduced efficacy or need for retreatment.

We recognize that jurisdictions may be affected by this recall and could experience challenges procuring enough Bicillin® L-A to meet their needs. Extencilline and Lentocilin© were approved by FDA for temporary importation due to prior shortages and remain available.

As we await resolution of this issue, it remains critical that potentially limited inventory be used to treat the patients who need it most.

CDC strongly encourages the following actions:

1. Identify whether you have current inventory of the recalled product and follow the guidance issued by the manufacturerExit Disclaimer (PDF, 1.16MB).
2. Take inventory:
   1. Monitor local supply of Bicillin^® L-Aand determine the local pattern of use to forecast needExit Disclaimer.
   2. Continue to contact distributors to procure Bicillin® L-A as appropriate. Contact Pfizer to request product through their Medical Request Process if the distributor has no supply.
3. Prioritize using Bicillin® L-A to treat women with syphilis during pregnancy, as penicillin is the only recommended treatment for pregnant women and babies with congenital syphilis.
   1. Choose doxycycline for men and non-pregnant women to help preserve Bicillin L-A® supplies. Doxycycline can be given at a dose of 100mg orally two times a day for two weeks (for early syphilis) or for four weeks (for late latent syphilis or latent syphilis of unknown duration). See CDC's treatment guidelines for more information.
   2. Consider involving antimicrobial stewardship leaders to help institute systems-level approaches to limit the use of Bicillin^® L-Aand encourage the use of alternative effective antimicrobials for treatment of other infections.
   3. Bicillin L-A® is one of the preferred prophylactic regimens for patients with acute rheumatic fever or rheumatic heart disease to reduce the likelihood of recurrent Streptococcal infections and acute rheumatic fever episodes. Twice daily administration of oral penicillin V is an alternative option for prophylaxis as detailed in Clinical Guidance for Acute Rheumatic Fever | Group A Strep | CDC.
4. Accurately stage syphilis cases to ensure appropriate use of antimicrobials. Early syphilis (primary, secondary, and early latent) only requires one dose of 2.4 million units of Bicillin® L-A, including during pregnancy. See the CDC STI Treatment Guidelines. A few reminders:
   1. A thorough physical exam is necessary to accurately stage syphilis. Primary lesions may be hidden inside the mouth, anus, or vagina; signs of secondary syphilis may be found on the skin, mouth, or anogenital area (i.e., mucus patches, condyloma lata). The rash of secondary syphilis can be subtle.
   2. Prior syphilis serologic test results can assist with staging a patient with latent syphilis as early latent, if there is evidence of new infection within the last year (i.e., new seroconversion or a sustained four-fold increase in RPR titer in a person who has had syphilis in the past).
   3. Reviewing signs and symptoms and sexual partner history from the past 12 months can assist with determining the likelihood of syphilis acquisition within the last 12 months, which also only requires one dose of Bicillin® L-A (2.4 million units) instead of three doses (7.2 million units).
   4. You can find resources for appropriately staging syphilis from the National STD CurriculumExit Disclaimer (NSTDC) and the New York City Department of Health and Mental Hygiene Bureau of Sexually Transmitted Infections/New York City STD Prevention Training CenterExit Disclaimer.
5. Communicate with healthcare providers and pharmacists.
   1. Notify healthcare providers and pharmacists of the limited availability of Bicillin^® L-A so they are aware and can plan appropriately.
   2. Clinicians with questions about syphilis clinical management should contact an Infectious Diseases specialist or the online National Network of STD Clinical Prevention Training Centers (NNPTC) STD Clinical Consultation NetworkExit Disclaimer.
6. Notify DSTDP and FDA of any shortage of Bicillin® L-A so we can continue to monitor this situation.
   1. If you are a Strengthening STD Prevention and Control for Health Departments (STD-PCHD) funding recipient and have questions about any of this information or need assistance, please contact your project officer.
   2. For other groups who are encountering challenges securing this drug to treat women with syphilis during pregnancy, please contact stdshortages@cdc.gov.

We appreciate all your hard work to prevent and address syphilis.

Sincerely,

Laura Hinkle Bachmann, MD, MPH, FIDSA, FACP
Chief Medical Officer
Division of STD Prevention
National Center for HIV, Viral Hepatitis, STD and TB Prevention
Centers for Disease Control and Prevention

Bradley Stoner, MD, PhD
Director
Division of STD Prevention National Center for HIV, Viral Hepatitis, STD and TB Prevention
Centers for Disease Control and Prevention