Preparing for a PSA test starts before you open a kit or attend a blood-test appointment. This guide explains how to plan your test, what to tell your healthcare professional and which instructions to check before collecting a sample.
It is a practical companion to our PSA test guide on prostate health, levels and results. Use that guide for the wider explanation of PSA testing, then use this page to organise your preparation.
Health information: A PSA test cannot diagnose or rule out prostate cancer on its own. Discuss testing and follow-up with a healthcare professional, especially if you have symptoms or concerns. Preparation does not remove the limitations of PSA testing. [9]
Why does PSA test preparation matter?
PSA levels can change for reasons other than cancer. Prostate inflammation, infection, recent biopsy, vigorous exercise and ejaculation can temporarily increase PSA. Some medicines can lower it. Knowing what happened before a sample was taken helps a clinician interpret the result in context. [3]
Think about two parts of preparation: choosing an appropriate time to test and following the sample-collection instructions. Write down questions about both before you begin. If an instruction is unclear, resolve it first rather than trying to work it out while collecting blood.
The aim is to give your healthcare professional useful information. It is not to produce a particular result. Record anything relevant honestly, including an activity or medicine you forgot to mention initially.
What should you avoid before a PSA test?
The table below summarises common preparation advice. It is a planning aid: your clinician may recommend a different interval for your circumstances. A waiting period for a PSA sample should never become a reason to delay seeking help for symptoms.
| Activity or situation | Preparation or timing to discuss |
|---|---|
| Ejaculation | Avoid for 48 hours before testing. [1] |
| Cycling or vigorous exercise | Avoid for 48 hours before testing. [1] |
| Receiving anal sex or prostate stimulation | Prostate Cancer UK advises avoiding these for one week. [2] |
| Urine infection | NHS advice is to wait 4–6 weeks after the infection has cleared. Agree timing with your clinician. [1] |
| Recent prostate biopsy | A biopsy within the previous six weeks can affect PSA. Tell your clinician. [2] |
| Bladder or prostate procedures, surgery or catheter insertion | A delay of up to six weeks may be needed; ask the treating team. [2] |
Ejaculation, cycling and vigorous exercise
The advice about ejaculation includes masturbation and sexual activity with a partner. Cycling and strenuous exercise can also temporarily raise PSA. Cleveland Clinic advises avoiding ejaculation and exercise for 48 hours before a PSA blood test. Tell your clinician if you have not been able to follow the preparation advice. [7]
Plan around the actual sample time. For example, a 48-hour period before a Wednesday 10am appointment begins on Monday at 10am. Put the appointment and preparation window in your calendar so you do not have to calculate them on the day.
Why do instructions about anal sex differ?
The NHS lists anal sex within its 48-hour preparation advice. Prostate Cancer UK gives a longer interval of one week for receiving anal sex or prostate stimulation. Follow the advice of the clinician arranging your test; ask if you are unsure which interval applies. [1] [2]
Urine infections and prostatitis: when to seek advice
Symptoms of a urinary tract infection can include burning when urinating, needing to urinate more often, cloudy urine, blood in the urine or a high temperature. Men and people assigned male at birth with suspected UTI symptoms should seek an urgent GP appointment or help from NHS 111. [5]
Prostatitis is inflammation of the prostate. Symptoms can include painful or difficult urination, genital or bottom pain, painful ejaculation and fever. See a GP if you have symptoms of prostatitis; if you cannot urinate, seek an urgent GP appointment or NHS 111 advice. [6]
Contact a healthcare professional about the symptoms first. When discussing a later PSA test, give the dates of the illness, treatment and recovery. Ask them to confirm the testing date rather than assuming that finishing a course of treatment automatically means you are ready to test.
When to seek urgent help: Blood in your urine, fever or pain in your lower abdomen or back alongside suspected UTI symptoms needs urgent assessment. Use an urgent GP appointment or NHS 111. Do not wait for a PSA result before seeking help. [5]
Can medicines affect PSA test results?
Finasteride and dutasteride can lower PSA levels. These medicines are used to treat an enlarged prostate, so the clinician interpreting your result needs to know you take them. A lower reading while taking either medicine needs appropriate clinical interpretation. [3]
Finasteride is also prescribed for male pattern hair loss. Mention it even if you take it for your hair rather than for urinary symptoms. NHS guidance specifically says to tell your doctor about finasteride before a PSA test. [4]
Prepare a medicine list with the name, dose, reason for taking it and approximate start date. Include prescriptions, medicines bought over the counter, vitamins and supplements. If you cannot remember a name, bring the packaging or a photograph of the label to your appointment.
Do not stop medicines, change doses or start treatment because of a kit result without speaking to your doctor. [8]
Do you need to fast before a PSA test?
For a PSA blood test alone, you can eat and drink as usual. Fasting is not normally required. [1]
If other blood tests are being taken at the same appointment, check the instructions for the whole appointment. Some blood tests require fasting or other preparation, and the GP, nurse or specialist should explain what is needed. [10]
Keep any appointment letter or message where you can find it. If different instructions appear to conflict, contact the service arranging the test and ask them to clarify before changing your routine.
Recent procedures: what to tell your clinician
If you have recently had a prostate biopsy, a bladder or prostate procedure, surgery, or a urinary catheter inserted, give the clinician the procedure date. These can affect the timing of a PSA test, and a delay of up to six weeks may be appropriate. The interval depends on what was done and your circumstances. [2]
Keep the discharge letter or procedure summary if you have one. You do not need to decide for yourself whether a procedure was significant: describe it and ask, “Does this change when I should have my PSA sample taken?”
If your specialist has already arranged a test, contact that team before cancelling or moving it. Explain any recent events and ask whether the existing plan still applies.
Preparing to use the VivaTest PSA Prostate Test Kit
The VivaTest PSA Prostate Test Kit uses a finger-prick blood sample and a cassette-style result window. Read the leaflet supplied with your particular kit before starting. This resource explains general preparation; the leaflet provides the device-specific procedure.
Check the expiry date and storage requirements. Identify the sample amount, collection method, order of steps, reading time and result diagrams in the instructions. Follow those instructions exactly, including any limits on when a result can be read. If you are unsure, ask for guidance before using the test. [8]
For an organised testing session, keep the instructions open, prepare a timer and choose a clear workspace. Work through these questions before collecting a sample:
- Have I checked that testing is appropriate at this time?
- Do I understand every step in the leaflet?
- Can I identify the collection components and where the sample goes?
- Have I found the result-reading time and diagrams?
- Do I know whom to contact with a question or concern?
Do not borrow sample volumes, drop counts or reading times from another PSA kit or an unrelated rapid test. Use the instructions for the device in front of you.
Keep a preparation and result record
A short note makes a follow-up conversation easier. You can use a phone note or paper checklist. Include:
- The test date and sample time.
- The test name and, for a kit, its batch details.
- Any symptoms and when they started.
- Recent infections, treatment dates and procedures.
- Your medicine and supplement list.
- Any preparation advice you could not follow.
- The result exactly as reported, without adding your own interpretation.
- Questions you want to ask and any follow-up already arranged.
Take this record to your appointment. If you have an earlier laboratory report, bring the report itself so the healthcare professional can see the date, value and units.
What should you do after testing?
A rapid PSA kit may give a result category rather than the precise numerical value provided by a laboratory test. An abnormal result needs GP follow-up; a reassuring-looking result must not replace assessment of symptoms or concerns. Prostate Cancer UK recommends discussing PSA testing with a GP. [9]
Useful follow-up questions include:
- “Do I need a laboratory PSA blood test?”
- “Could my medicines or recent illness affect the interpretation?”
- “Do my symptoms need investigation regardless of this result?”
- “If another sample is needed, when should it be taken?”
- “How will I receive the result, and whom should I contact if I do not hear back?”
For the wider explanation of levels and follow-up, read our PSA testing and prostate health guide. You can also return to the PSA Test Resources page.
Frequently asked questions about PSA test preparation
Can I have a PSA test after cycling?
Cycling can temporarily affect PSA. Avoid it for 48 hours before testing, and tell the clinician if you cycled within that period. [7]
Does the advice about ejaculation include masturbation?
Yes. The preparation advice concerns ejaculation, whether during masturbation or sex with a partner. Allow 48 hours beforehand. [7]
Can I test immediately after a urine infection?
NHS advice is to wait 4–6 weeks after the infection has cleared. Confirm your testing date with your clinician, particularly if symptoms continue. [1]
Should I stop finasteride before testing?
Tell the clinician you take it and ask for medicine advice. Finasteride affects PSA interpretation. Do not change treatment based on a self-test without speaking to your doctor. [4] [8]
How many drops of blood do I need, and when do I read the result?
Use the sample quantity and reading time in the leaflet supplied with your kit. If those instructions are missing or unclear, contact the supplier before testing.
Does careful preparation make a PSA test definitive?
No. PSA testing still has limitations and cannot confirm or exclude prostate cancer by itself. Symptoms, medical history and clinical follow-up remain important. [9]
Sources and further reading
These sources support the general health information on this page. For the VivaTest device procedure, follow the instructions supplied with the kit.
- NHS: PSA test and preparation.
- Prostate Cancer UK: What can affect a PSA blood test?.
- National Cancer Institute: PSA test fact sheet.
- NHS: Finasteride and PSA testing.
- NHS: Urinary tract infections.
- NHS: Prostatitis.
- Cleveland Clinic: Preparing for a PSA test.
- FDA: General guidance on following home-test instructions.
- Prostate Cancer UK: PSA self-test kits and their limitations.
- NHS: Preparing for blood tests.
