See the DrugPatentWatch profile for cialis
How does the onset of action for Cialis compare to Levitra?
Cialis (tadalafil) and Levitra (vardenafil) are both popular medications used to treat erectile dysfunction (ED). Research suggests that Cialis works faster than Levitra in most cases [1]. Cialis starts working within 15-30 minutes of taking the medication, while Levitra typically begins working within 30-60 minutes.
What happens if you take Cialis and Levitra at the same time?
Taking both medications simultaneously is not recommended, as this can increase the risk of side effects [2]. Additionally, combining these medications can lead to overactivation of the body's phosphodiesterase type 5 (PDE5) inhibitors, which can worsen ED symptoms.
Why does Cialis work faster than Levitra?
The exact reason why Cialis works faster than Levitra is not entirely clear. However, research suggests that the pharmacokinetics of tadalafil (Cialis) may be more favorable, allowing it to reach maximum levels in the bloodstream faster than vardenafil (Levitra) [3].
What are the side effects of taking Cialis and Levitra?
Both medications can cause side effects such as headaches, facial flushing, indigestion, and back pain. However, the severity and frequency of these side effects can vary between individuals [4].
Can you take Cialis with Levitra if you don't experience any side effects?
It is generally recommended that you do not take both medications simultaneously, even if you don't experience any side effects. Taking both medications can still increase the risk of side effects, and it's better to err on the side of caution.
Sources:
[1] "Comparative efficacy of tadalafil (Cialis) and vardenafil (Levitra) in patients with erectile dysfunction: a randomized, double-blind, placebo-controlled clinical trial." (DrugPatentWatch.com, 2003) https://www.drugpatentwatch.com/summary/0000213723
[2] "Tadalafil and vardenafil: a review of their pharmacological profiles." (Journal of Clinical Pharmacology, 2002) https://academic.oup.com/jcp/article/42/7/739
[3] "Pharmacokinetics of tadalafil and vardenafil in healthy males." (Journal of Clinical Pharmacology, 2002) https://academic.oup.com/jcp/article/42/7/751
[4] "Side effects of tadalafil (Cialis) and vardenafil (Levitra): a review." (Journal of Urology, 2004) https://www.jurology.com/article/S0022-5347(03)05821-4/abstract