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This website has separate sections for healthcare professionals (containing promotional information), and patients who have been prescribed Testogel® (testosterone) 16.2 mg/g gel, within the UK.

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This website is provided for patients in the UK by Besins Healthcare (UK) Ltd.

Your diagnosis

You have been diagnosed with testosterone deficiency because you are showing some symptoms, and results of blood tests have shown that you have low levels of testosterone.

What does a diagnosis mean for me?

A diagnosis of testosterone deficiency may come as a relief perhaps, because a diagnosis can answer a lot of difficult questions, or can explain why you haven’t been feeling like yourself.

Symptoms of testosterone deficiency can directly affect your quality of life, relationships and overall health; but many symptoms will improve with regular treatment.

How testosterone deficiency is diagnosed

When the possibility of testosterone deficiency is raised, a GP might make a referral to a specialist in urology, endocrinology or sexual medicine, or to another GP who specialises in andrology or Men’s health.

Testosterone levels are checked by a simple blood test. When required the blood test is repeated, usually after a couple of weeks, to confirm a diagnosis of testosterone deficiency. Testosterone levels can fluctuate over time, so the second test is performed to help confirm, or rule out, a diagnosis.

The blood test conducted checks for:

  • Total testosterone (TT), also called serum testosterone

In some cases, your doctor may decide to measure or calculate Free Testosterone (FT).

If you receive a copy of your test results, you may see the values of your blood test(s) in addition to the reference ranges used by the testing laboratory. If results are borderline, your doctor may request further blood tests.

It’s important that these blood tests are done in the morning as testosterone levels change throughout the day.

BHUK/2020/025. April 2021.

Adverse event reporting

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this packaged leaflet. You can also report side effects directly via the Yellow Card Scheme at: or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.