What is the recommended treatment for leptospirosis?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: July 3, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

From the Research

The recommended treatment for leptospirosis is antibiotics, with doxycycline and penicillin being the primary options, and ceftriaxone as an effective alternative for those with penicillin allergies. For mild cases, oral doxycycline 100mg twice daily for 7 days is typically prescribed 1. For severe cases requiring hospitalization, intravenous penicillin G at 1.5 million units every 6 hours for 7 days is the standard approach, as demonstrated by a prospective, open-label, randomized trial 2. Alternatively, ampicillin or amoxicillin can be used. Ceftriaxone 1g daily for 7 days is an effective alternative for those with penicillin allergies, with a study showing its efficacy in treating severe leptospirosis 3.

Key Considerations

  • Treatment should begin as soon as leptospirosis is suspected, without waiting for laboratory confirmation, as early intervention significantly improves outcomes.
  • Supportive care is also essential, including fluid replacement, pain management, and fever control.
  • In severe cases with kidney or liver involvement, dialysis or intensive care may be necessary.
  • Antibiotics work by eliminating the Leptospira bacteria from the bloodstream and tissues, preventing further damage to organs such as the kidneys, liver, and lungs.
  • Prompt treatment is crucial as it can shorten the illness duration and reduce the risk of complications, as highlighted in a review of antimicrobial therapy for leptospirosis 4. Some studies have also explored the use of corticosteroids in severe cases, but this approach is not widely recommended and should be considered on a case-by-case basis 5.

References

Research

Doxycycline therapy for leptospirosis.

Annals of internal medicine, 1984

Research

Ceftriaxone compared with sodium penicillin g for treatment of severe leptospirosis.

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2003

Research

Use of ceftriaxone in patients with severe leptospirosis.

International journal of antimicrobial agents, 2006

Research

Antimicrobial therapy of leptospirosis.

Current opinion in infectious diseases, 2006

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.