Generic Cialis: What it is and how to get it safely in the UK
- What generic Cialis is and how it differs from the branded version
- Whether generic tadalafil is as effective and safe as branded Cialis
- How much cheaper generic tadalafil is in the UK
- How to access generic Cialis safely through legitimate channels
- The risks of buying unregulated products online
- What is generic Cialis?
- Is generic Cialis the same as branded Cialis?
- Is generic Cialis safe?
- Generic vs branded Cialis: How much cheaper is tadalafil?
- What generic doses are available in the UK?
- Does the NHS prescribe generic tadalafil?
- How to buy generic Cialis online safely in the UK
- Risks of buying unregulated generic Cialis online
- Final thoughts
What is generic Cialis?
Generic Cialis refers to any licensed tadalafil tablet not manufactured by Eli Lilly under the Cialis brand name. Eli Lilly's original patent on tadalafil expired in the UK in 2017, after which other manufacturers were permitted to produce and sell tadalafil generically. Today, multiple MHRA-approved manufacturers produce generic tadalafil, all of which must meet the same regulatory standards as branded Cialis.
Good to know
When your GP prescribes tadalafil by its generic name rather than as Cialis, the pharmacy may dispense any licensed tadalafil product. Both are therapeutically identical and interchangeable.
Is generic Cialis the same as branded Cialis?
Yes, in clinical terms. Generic tadalafil must demonstrate bioequivalence to branded Cialis before it can be licensed and sold in the UK. Bioequivalence means the generic medicine delivers the same amount of active ingredient into the bloodstream at the same rate as the branded version. In plain terms, your body cannot tell the difference between generic tadalafil and branded Cialis once either tablet is absorbed.
Both work by inhibiting PDE5, an enzyme that breaks down cyclic GMP (a chemical messenger that relaxes smooth muscle and increases blood flow) in the penile arteries. The mechanism, onset, duration, and side effect profile are identical across all licensed tadalafil products. See our guide on how Cialis works for more information.
Some patients report subjective differences between branded and generic versions. These are not supported by clinical evidence and are more likely to reflect variation in inactive ingredients such as fillers and coatings, which affect tablet appearance but not the active drug's behaviour in the body.
Is generic Cialis safe?
Yes, when obtained from a GPhC-registered UK pharmacy or regulated prescribing service. All MHRA-licensed generic tadalafil products undergo rigorous assessment covering quality, safety, and bioequivalence before approval.
The safety considerations that apply to tadalafil, including its absolute contraindication with nitrate medications, apply equally to branded and generic versions. A clinical assessment before starting treatment is required regardless of which version you use.
Warning!
Generic tadalafil purchased from unregulated online sources is not subject to MHRA oversight and may be counterfeit, substandard, or contaminated. The safety guarantees that apply to licensed products do not apply to unlicensed ones. For guidance on legitimate sources, see our guide to where to buy Cialis.
Generic vs branded Cialis: How much cheaper is tadalafil?
The price difference is significant. When Eli Lilly's patent expired, multiple manufacturers entered the market without the original research and development costs, driving prices down considerably.
| Branded Cialis | Generic tadalafil | |
|---|---|---|
| 10 mg per tablet | Approx. £8–£15 | Approx. £1–£3 |
| 20 mg per tablet | Approx. £10–£20 | Approx. £1–£4 |
| 5 mg daily (per month) | Approx. £40–£70 | Approx. £15–£30 |
Prices based on UK private prescription data, April 2026. Always confirm current pricing directly with your chosen GPhC-registered provider.
Good to know
Switching from branded Cialis to generic tadalafil is not a clinical compromise; it is a cost decision. For a full breakdown of pricing across doses and providers, see our Cialis price guide.
What generic doses are available in the UK?
Generic tadalafil is available in the same doses as branded Cialis:
- 2.5 mg and 5 mg: For daily use, maintaining a continuous low-level effect
- 10 mg: Recommended on-demand starting dose for most men
- 20 mg: Maximum on-demand dose; prescribed when 10 mg is insufficient
All doses are available on private prescription. The 5 mg daily, 10 mg and 20 mg on-demand doses are also available on NHS prescription for eligible patients.
Does the NHS prescribe generic tadalafil?
Yes. When tadalafil is prescribed on the NHS, the pharmacy will almost always dispense generic tadalafil rather than branded Cialis. In England, the standard prescription charge of £9.90 per item applies. Prescriptions are free in Scotland, Wales, and Northern Ireland for eligible patients.
NHS prescribing for ED is criteria-based. Tadalafil is funded primarily for men whose ED is associated with a specific underlying condition such as diabetes, multiple sclerosis, or prostate cancer treatment, and for benign prostatic hyperplasia under certain NICE criteria.
Speak to your GP about whether you qualify for NHS-funded tadalafil before committing to private costs.
How to buy generic Cialis online safely in the UK
Generic tadalafil is prescription-only and requires a clinical assessment by a UK-registered prescriber. Regulated online clinics connect patients with prescribers who can assess suitability and issue a private prescription remotely, which is then dispensed by a GPhC-registered pharmacy. It is not possible to buy Cialis over the counter.
DoktorABC connects UK patients with licensed prescribers who can assess suitability for generic tadalafil and issue private prescriptions where clinically appropriate.
How to verify a legitimate online pharmacy
- Look for the GPhC internet pharmacy logo and click it to confirm it links to the pharmacy's entry at pharmacyregulation.org
- Confirm the service requires a health questionnaire or prescriber consultation before dispensing
- Check CQC registration for prescribing services
- Confirm there is a UK address and accessible contact details
Risks of buying unregulated generic Cialis online
A significant number of websites offer tadalafil without a prescription or medical assessment, often at prices well below the regulated market. This is illegal in the UK and carries genuine health risks.
Warning!
The MHRA has consistently warned that a significant proportion of ED medicines from unregulated online sources are counterfeit, contain no active ingredient, or include harmful contaminants. Red flags include: no medical questionnaire required; prices far below market range; no verifiable GPhC logo; payment by bank transfer only; and no UK contact address. Report suspected counterfeit products via the Yellow Card scheme at yellowcard.mhra.gov.uk.
Final thoughts
Generic tadalafil is pharmacologically identical to branded Cialis, costs significantly less, and is widely available through legitimate UK channels. There is no clinical reason to pay more for the branded product. Accessing it safely through a registered prescriber or GPhC-registered pharmacy is straightforward.
FAQ
What is generic Cialis?
Licensed tadalafil tablets produced by manufacturers other than Eli Lilly. They contain the same active ingredient and are therapeutically identical to branded Cialis.
Is generic Cialis as effective as branded Cialis?
Yes. All licensed generic tadalafil must demonstrate bioequivalence to branded Cialis before MHRA approval. The clinical effects are identical.
Is generic Cialis safe?
Yes, from a GPhC-registered UK source. Unlicensed tadalafil from unregulated online sources is not subject to MHRA oversight and carries genuine safety risks.
How much cheaper is generic tadalafil than branded Cialis?
Considerably cheaper. Generic tadalafil 20 mg typically costs £1 to £4 per tablet privately, compared to £10 to £20 for branded Cialis.
Can I get generic tadalafil on the NHS?
Yes, for eligible patients. Standard prescription charges apply in England. Speak to your GP about eligibility.
How do I verify a legitimate online pharmacy?
Check for the GPhC internet pharmacy logo and click it to confirm it links to the pharmacy's entry at pharmacyregulation.org. The service must require a medical assessment before dispensing.
Where can I report a side effect from generic tadalafil?
Via the MHRA Yellow Card scheme at yellowcard.mhra.gov.uk, through the Yellow Card app, or by asking your prescriber or pharmacist to report on your behalf.
The DoktorABC medical advisory board
Dr. Roland Ruiken
Medical advisor, Norway
Dr. Viktor Simunovic
Medical advisor, Croatia