Method of Treatment
Penicillin injection (or oral antibiotics when clinically appropriate)
Length of Treatment
Varies upon stage of syphilis
Further Actions
• Re-test in 1, 3, 6 & 12 months
• Inform and assess relevant partner(s)
Locations
Fees
• Penicillin injection – £200/dose (first dose £260 if tested elsewhere)
• Oral antibiotics – £100 (or £160 if tested elsewhere)
Journey Overview

#1 Book an Appointment
If you tested with us, you can usually book directly for treatment.
If you tested elsewhere, a consultation will first be required so a clinician can review your results and medical history and recommend the appropriate treatment. Penicillin injection is the usual first-line treatment for syphilis, with alternatives considered when clinically appropriate. Please bring evidence of your test result where possible.
#2 Receive Treatment
If treatment is clinically appropriate and safe to proceed, you will be asked to attend the clinic for treatment.
#3 Further Actions
After your syphilis treatment:
• Avoid sexual contact until at least two weeks after you and your partner(s) have completed treatment, or until any sores have healed, whichever is later.
• Tell your recent sexual partners so they can get tested and treated if needed. Your sexual health clinic can help with confidential partner notification.
• Attend your follow-up appointments and syphilis blood tests as advised. RPR or VDRL blood tests are used to check how well you have responded to treatment.
• Your clinician may also recommend testing for other STIs, including HIV.
Your syphilis treatment depends on the stage of infection. Late-stage or syphilis of unknown duration usually requires three weekly penicillin injections. Syphilis affecting the brain, eyes or ears needs specialist treatment.
If you develop new symptoms or are concerned about reinfection after treatment, contact your healthcare professional for advice.
Patient Feedback
FAQs
If you have tested positive for syphilis or are concerned about a possible exposure, we provide confidential assessment, treatment, and follow-up care.
Treatment usually involves penicillin injections, which are highly effective. If you are allergic to penicillin, alternative antibiotics may be suitable. We also provide follow-up blood tests to confirm the treatment has been successful, along with advice on recovery, partner notification, and when it is safe to resume sexual activity.
Yes. It is important to tell any recent sexual partners so they can be tested and treated if needed, helping prevent further transmission and reinfection.
The partners who should be notified depend on the stage of your infection. If you are uncomfortable telling them yourself, many sexual health services offer anonymous partner notification. Avoid sexual contact until you have completed treatment and your clinician confirms it is safe.
Syphilis treatment is highly effective, especially when the infection is diagnosed early.
Treatment eliminates the bacteria and prevents further complications. If syphilis has already caused damage to organs or nerves, treatment may not reverse existing damage, but it will stop the infection from progressing. Follow-up blood tests are needed to confirm treatment has been successful.
Most people tolerate syphilis treatment well. The most common side effect is the Jarisch-Herxheimer reaction, which can occur within 24 hours of starting treatment.
Symptoms may include:
• Fever or chills
• Headache
• Muscle or joint aches
These symptoms usually settle within 24 hours. Mild soreness at the injection site is also common. Seek urgent medical attention if you develop signs of a severe allergic reaction, such as difficulty breathing or swelling of the face or throat.
Syphilis should be treated promptly during pregnancy to reduce the risk of passing the infection to the baby.
Penicillin injections are the recommended treatment because they are safe in pregnancy and treat both the parent and the baby. If you have a penicillin allergy, you may need treatment in a hospital setting. You will also need closer follow-up with repeat blood tests throughout pregnancy.
No. There are no effective home remedies or over-the-counter treatments for syphilis.
Syphilis requires prescription antibiotics. Delaying treatment or relying on home remedies can allow the infection to progress and increase the risk of serious complications. If you think you may have syphilis, seek medical assessment as soon as possible.
The antibiotics begin working as soon as treatment starts, but it takes time for the infection to clear.
Most sores or rashes begin to improve within 1–2 weeks. Avoid sexual contact until at least two weeks after completing treatment, or until your clinician advises it is safe. Follow-up blood tests over the following months confirm the treatment has worked.
Menopause does not reduce the effectiveness of syphilis treatment.
The most important factors are completing the prescribed treatment and attending any recommended follow-up appointments and blood tests. If you have concerns about your treatment or symptoms, speak with your healthcare professional.
If your symptoms persist, worsen, or return after treatment, you should be reviewed by a healthcare professional.
Some symptoms can take time to resolve, but ongoing or new symptoms may indicate reinfection or that further assessment is needed. Avoid sexual contact until you have been reassessed and advised it is safe.
Treatment failure is uncommon, but it can occur. Reinfection from an untreated partner is more common than true treatment failure.
If follow-up blood tests do not show the expected improvement or symptoms return, further assessment is needed. Additional treatment may be recommended depending on your results.
Yes. Follow-up blood tests are an important part of syphilis treatment.
These are usually arranged at around 3, 6, and, if needed, 12 months after treatment to confirm the infection has responded. You should also seek review if you develop new symptoms or think you may have been exposed again.
Possibly. Current and recent sexual partners should be tested and assessed, even if they do not have symptoms.
Depending on the timing of exposure, a partner may be offered treatment before their test results are available to reduce the risk of complications and onward transmission. Ensuring partners are tested and treated also helps prevent reinfection.
Page last reviewed by Mrs Magdalena Nowacka on 18 September 2026 for general guidance only. It is not intended to replace the advice of your clinician.