Viagra or Cialis: Eternal Competition
Viagra and Cialis are main medicines designed for treatment of erectile dysfunction. Viagra containing sildenafil is a time-honored medicine discovered more than 25 years ago. Cialis (tadalafil) also has a high scientific-evidentiary foundation due to various clinical trials. What are the principal differences between these remedies?
The problem of medicine selection depends on various factors. Aged patients should opt for Cialis, whereas those who suffer from ED of psychogenic character should choose Viagra. Correctly picked Viagra Cialis online is a formula for success!
- Duration of effect. Viagra is valid up to 6 hours, whereas Cialis beats all records with its duration of 36 hours. Thus, Cialis is more comfortable in this Cialis versus Viagra struggle, since it poses no problems due to the sudden ending of effect.
- Onset time. It is critical in estimation of pharmaceutical characteristics. This feature is almost the same for both medications – around 30-45 minutes.
- Interaction with food and alcohol. Medicinal effect of Viagra decreases with generous and fat food; therefore, it is taken fasted. Alcohol may weaken Viagra’s action. As for Cialis – food and ethanol have almost no adverse effect on its impact.
- Elimination half-life. This indicator is important for those who suffer from cardio-vascular and renal disorders (they are usually prescribed nitrates). The intake of these medications in combination with nitrates-containing remedies is dangerous for life. Viagra’s least elimination half-life is 3-5 hours; therefore, it may be administered by heart disease sufferer only on doctor's orders. Cialis’s half-life is 18 hours so it is absolutely counter-indicative for such patients.
- Chromatic sensation impact. Viagra is able to change vision, whereas Cialis doesn’t have such effect.
- Usage in case of diabetes. Cialis is much safer for diabetics than Viagra, but has a weaker action.
- Side-effects. Undesired effects of Viagra Cialis are rather similar. Nevertheless, it should be mentioned that Cialis is more secure and causes less negative sensations.
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