How to Use Testogel: Pump and Sachets
Applying Testogel correctly, how the pump and sachets compare, and how to keep your partner and children safe.
Part of the Access Doctor Low Testosterone Guide.
Key fact: Apply Testogel each morning to your shoulders or upper arms, let it dry, cover it with clothing and wash your hands. Wait at least 1 hour before showering, and wash the area before skin-to-skin contact with anyone.
Testogel is the most widely used testosterone gel in the UK. It comes as a pump (16.2mg/g) and as 40.5mg sachets, which contain the same gel. Used properly, it gives steady testosterone levels through the day. For background on the condition it treats, see our guide to low testosterone.
Already Prescribed Testosterone Gel?
Order your repeat prescription online, checked by a UK pharmacist prescriber against your current prescription and blood tests.
Start Low Testosterone Consultation →Testogel Pump vs Sachets
| Testogel pump | Testogel sachets | |
|---|---|---|
| Gel | 16.2mg/g | 16.2mg/g (40.5mg in 2.5g) |
| Each dose | 1 press = 20.25mg | 1 sachet = 40.5mg |
| Usual dose | 2 presses a day | 1 sachet a day |
| Adjusting the dose | In single presses, 1 to 4 a day | In half sachets, up to 2 a day |
| Pack | 88g pump, at least 60 presses | Box of sachets |
| Best for | Adjustable doses at home | A fixed dose, and travel |
Two presses of the pump equal one sachet. Changing between them is simple, but should still be agreed with your prescriber.
Have an older prescription for 50mg sachets? The current UK Testogel sachet is 40.5mg, a more concentrated gel in a smaller sachet. The doses aren’t identical, so ask your GP or specialist to update your prescription.
How to Apply Testogel
1
Choose your time
Apply it at the same time each morning, ideally after your shower.
2
Prime a new pump
Press a new pump 3 times and throw that gel away. Sachets don’t need priming.
3
Apply to shoulders or upper arms
Spread it as a thin layer over clean, dry, healthy skin on both shoulders or both upper arms. There’s no need to rub it in. Never apply it to the genitals.
4
Let it dry, then cover it
Wait 3 to 5 minutes before dressing, then keep the area covered with clothing.
5
Wash your hands
Use soap and water straight away.
6
Wait before washing the area
Leave at least 1 hour before showering, bathing or swimming.
Your Dose and Blood Tests
The usual dose is 40.5mg a day: 2 presses or 1 sachet. Your prescriber adjusts it in steps, up to 81mg a day, based on your blood tests. Testosterone levels settle within a couple of days, and are usually checked in the morning before your dose. Don’t change your dose yourself. If you forget a dose, don’t apply a double dose; follow the leaflet in your pack.
Read our testosterone blood test guide for timing and ranges.
Repeat prescription · Rx
Testogel 16.2mg/g Pump
For men already prescribed Testogel. 20.25mg per press.
View product →Repeat prescription · Rx
Testogel 40.5mg Sachets
Single-dose sachets for men already on Testogel.
View product →Protecting Your Partner and Children
Testosterone can pass to other people through your skin. In children it can cause early puberty, such as genital enlargement and pubic hair. In women it can cause facial and body hair and a deeper voice. Pregnant women must avoid contact with the area (MHRA, 2023).
- Wash your hands with soap and water straight after applying it
- Cover the area with clothing once it’s dry
- Wash the area with soap and water before any skin-to-skin contact (at least 1 hour after applying it)
- If someone touches the area, they should wash their skin straight away
Side Effects
The most common side effects are skin reactions where you apply it, such as redness, acne and dry skin. Testosterone treatment can also raise your red blood cell level and PSA, which is why regular blood tests are needed. See TRT side effects and monitoring.
Practical Tips
- It’s flammable until dry: keep away from flames, and don’t smoke until it has dried
- Keep it out of children’s reach, and store it as the leaflet in your pack says
- Travelling: sachets are easier to carry; keep the pharmacy label with your gel
Already on Testosterone Treatment?
Order your repeat prescription online. A UK pharmacist prescriber checks your treatment and recent blood results. For men already prescribed testosterone only.
Start Low Testosterone Consultation →Frequently Asked Questions
Where should I apply Testogel?
On clean, dry, healthy skin over both shoulders or both upper arms. Don't apply it to your genitals, stomach or thighs.
How long after applying Testogel can I shower?
Wait at least 1 hour before showering, bathing or swimming, so the testosterone has time to absorb.
How long does Testogel take to work?
Testosterone levels rise within a day or two. Sex drive and energy may improve within a few weeks, while changes in muscle and bone take months.
Is the Testogel pump the same as the sachets?
They contain the same 16.2mg/g gel. One 40.5mg sachet equals 2 presses of the pump. The pump makes it easier to adjust your dose in small steps.
What if I miss a dose of Testogel?
Don't apply a double dose to make up for it. Carry on with your usual dose the next morning, and follow the leaflet in your pack.
Can I apply Testogel at night?
It's usually applied in the morning, because that matches the body's natural testosterone rhythm and the timing of blood tests. Speak to your prescriber before changing the time.
References
- Electronic Medicines Compendium. Testogel 16.2mg/g gel: Summary of Product Characteristics. medicines.org.uk
- Electronic Medicines Compendium. Testogel 40.5mg transdermal gel in sachet: Summary of Product Characteristics. medicines.org.uk
- MHRA Drug Safety Update. Topical testosterone (Testogel): risk of harm to children following accidental exposure. January 2023. gov.uk
- Cumbria, Northumberland, Tyne and Wear NHS Foundation Trust. Formulations and dose equivalents of transdermal testosterone preparations. January 2024. cntw.nhs.uk
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Prescription medicines require a consultation before they can be dispensed. Always consult a qualified healthcare professional for diagnosis and treatment. In a medical emergency, call 999.