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Viagra or Cialis: What's The Difference?

Published : Friday October 16, 2015 | Posted in : Men's Health

Erectile dysfunction, also known as impotence or ED, is a very common condition for UK men, particularly those aged over 40. It is estimated that 10% will be affected at any one time, and half of men aged from 40-70 will experience some degree of ED.

The condition is linked with many other health issues that are becoming increasingly widespread, such as obesity, diabetes and high-blood pressure, all of which can affect hormone levels or blood flow to the penis.

Though Viagra is the best-known treatment for erection problems, alternative treatments are gaining ground in the industry. Cialis is one of them, but what's the difference between Viagra and Cialis? Which treatment is the most efficient?

In order to help you decide whether Viagra or Cialis is right for you, we compared them according to five criteria:


  • How the treatments work
  • How long they last
  • Side effects
  • Cost
  • Effectiveness - based on clinical trials

How they work

Both treatments are classed as PDE-5 inhibitors and work in the same way to increase blood flow to the penis and enable a firmer and longer-lasting erection. The key difference between Viagra and Cialis is their active ingredient; Viagra contains sildenafil while Cialis is tadalafil. 


How long they last

When taken on an empty stomach or after a light meal, both treatments take between 20 and 30 minutes to start working. However the length of the effect is really what differentiates Viagra and Cialis.
The 'little blue pill' works for about 4 hours, while Cialis can last up to 36 hours. That is why Cialis is nicknamed the "weekend pill". Bear in mind that, when taking the erectile dysfunction treatment, you will still need to be sexually stimulated for it to have an effect. So don't worry that 36 hours will be too long…

Possible side effects

In terms of side effects, the two treatments can also be very similar. The most common are headache, indigestion and facial flushing. If you experience any of these, it is recommended to take a lower dosage next time.

The cost

These treatments can be costly, because pharmacies can define the price of their treatments. When bought online from a registered pharmacy, four 50mg Viagra tablets will cost between £35 and £80, while Cialis is usually priced from £40 to £80 for a pack of four. This excludes any consultation or delivery charge there might be.

If you buy your treatment online, make sure you get it from an EU certified pharmacy. Beware of websites that sell pills by unit. It is illegal and the pills are likely to be fake and could damage your health.

Which is the most effective?

During clinical trials, 62% of men using Viagra 25mg had better erections. The results improved when they increased the dosage. With Viagra 50mg, 74% of patients said they were very happy with the treatment.

When using Cialis 10mg, 82% of men said they had better erections, that is to say 20% more than with Viagra.

So, in conclusion, it's the little yellow pill that not only lasts longer but it is also more effective.







You may be interested to know that there is also a once-a-day version of this treatment, called Cialis Daily. This treatment eliminates the need to take a tablet 30 minutes before sex, and instead allows you to be more spontaneous with your sex life.

For more information about these and other erectile dysfunction treatments, visit our ED treatment comparison page.

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