A generic medication contains the same active ingredient, at the same dose, in the same pharmaceutical form as the original branded product. When a drug patent expires, other manufacturers can produce and sell generic versions. In the UK, all generic medicines must be approved by the MHRA and meet the same standards of quality, safety, and efficacy as the original.
Generic ED Medications in the UK
The following branded ED drugs now have generic equivalents:
- Viagra (sildenafil) — patent expired 2013; generic sildenafil widely available
- Cialis (tadalafil) — patent expired 2017; generic tadalafil widely available
- Levitra (vardenafil) — patent expired 2018; generic vardenafil available
Avanafil (Spedra) is still under patent protection and is only available as the branded product.
Are Generics Equally Effective?
Yes. To receive MHRA approval, a generic must demonstrate bioequivalence — meaning it is absorbed into the bloodstream at the same rate and to the same extent as the branded version. In clinical terms, you should expect identical therapeutic effects.
The MHRA requires generic manufacturers to comply with the same Good Manufacturing Practice (GMP) standards as branded manufacturers. Regular inspections and batch testing ensure ongoing quality.
What Can Differ?
While the active ingredient is identical, generics may differ in:
- Inactive ingredients (excipients) — fillers, binders, colouring agents, and coatings may vary. This is rarely clinically significant but can matter if you have specific allergies
- Appearance — the tablet shape, colour, and size may look different from the branded version
- Packaging — generics typically come in simpler packaging
These differences do not affect how the medication works.
Why Are Generics Cheaper?
Generic manufacturers do not need to fund the original research and development or large-scale clinical trials. They benefit from the safety and efficacy data already established by the branded product. Competition between multiple generic manufacturers also drives prices down. For example, generic sildenafil can cost up to 90% less than branded Viagra.
Should You Choose Generic or Branded?
For the vast majority of men, generic ED medication is the sensible choice. It offers the same clinical benefit at a significantly lower price. The NHS routinely prescribes generics as standard practice.
Some men prefer branded products for familiarity or trust. This is a personal preference rather than a medical one — both are equally regulated and effective.
Staying Safe
Always obtain ED medication — whether generic or branded — from a GPhC-registered pharmacy. Unlicensed or counterfeit medications purchased from unregulated websites may contain incorrect doses, harmful ingredients, or no active ingredient at all. Check the GPhC register at pharmacyregulation.org before making a purchase.