Long-acting injection: Price, Pros & Cons in the UK
Fewer doses a year, at the cost of needing a clinic visit each time.
Quick Facts
- TRT — e.g. undecanoate
- Typical cost: £120–£200/mo
- 2 providers currently offer this
- Content last reviewed 13 August 2026
This page provides general information, not medical advice — whether any treatment is right for you is a decision for a UK-registered prescriber after reviewing your individual history.
What it is
A long-acting testosterone ester (such as undecanoate) given as an injection roughly every 10 to 14 weeks, typically administered by a clinician rather than self-injected at home.
Pros and cons
Why it's good
- Far fewer doses per year — as few as 4 to 5 injections annually
- Removes the need to manage a weekly or fortnightly self-injection routine
- Levels stay steadier over the longer dosing interval once established
Why it's not for everyone
- Usually requires an in-clinic appointment for each dose, rather than self-administering at home
- Harder to quickly adjust or stop treatment if side effects occur, since each dose lasts months
- Not every UK online clinic offers this option — availability is more limited
- Initial loading doses are needed before reaching the maintenance interval
Who it's best for
People who want to minimise how often they think about their TRT, and who don't mind attending a clinic periodically.
Typical cost
Providers offering this
Frequently asked questions
What is Long-acting injection?
A long-acting testosterone ester (such as undecanoate) given as an injection roughly every 10 to 14 weeks, typically administered by a clinician rather than self-injected at home.
How much does Long-acting injection cost in the UK?
Long-acting injection typically costs £120–£200/mo in the UK, though the exact price depends on dose and provider.
Who is Long-acting injection best suited to?
People who want to minimise how often they think about their TRT, and who don't mind attending a clinic periodically.
Sources
- NHS website — medicines information.
- Electronic Medicines Compendium (emc) — Summary of Product Characteristics for the licensed product.
- Medicines and Healthcare products Regulatory Agency (MHRA) — UK licensing and safety information.
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