Viagra vs Cialis – whats the difference?

Viagra vs Cialis

Viagra was the drug that changed the world in 1998 and revolutionised treatment for men with erectile dysfunction (ED). Cialis was the second ED drug brought to market and earned the nickname The Weekend Pill as it’s duration of action is 36 hours (Viagra lasts for 4 hours). Other tablets to treat ED are Levitra and Spedra.

Viagra has been ‘off patent’ since 2013 which means legal copies of the drug can now be sold in the UK as generics called sildenafil, and there are now many brands of sildenafil available.

Both treatments are available on prescription only following an erectile dysfunction consultation:
Buy treatment from £1.50 per tablet

Compare Viagra and Cialis

Viagra and Cialis comparison data
ViagraCialis
Chemical nameSildenafilTadalafil
Starting dose50mg10mg
Low dose25mg2.5mg–5mg
Maximum dose100mg20mg
Onset time40 minutes30 minutes
Duration of action4 hours36 hours
Common side effectsHeadache, palpitation, indigestion, dizziness, congestion, flushing, blurred visionHeadache, muscle pain, indigestion, congestion, flushing, dizziness
Cautions and interactionsAny nitrate-based medication, low blood pressure, retinitis pigmentosa, recent myocardial infarction, anginaAny nitrate-based medication, low blood pressure, recent myocardial infarction, angina
Patient leafletView PDFView PDF
UK patentExpired June 2013Expires November 2017
Branded priceFrom £5.13 per tabletFrom £2.47 per tablet
Generic priceFrom £1.50 per tabletNot available
Available on NHSYes as generic sildenafil (usually 4 tablets per month)Not usually

Buy treatment from £1.50 per tablet

Video: Viagra vs. Cialis: Little Blue Pill Is Losing Big

Eric Chemi from Bloomberg discusses two of the most popular erectile dysfunction drugs: Which will become the dominant medication in coming years, Viagra or Cialis?
Watch the December 2012 video below.

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