Viagra and Levitra last about 4 to 5 hours ( and sometimes as much as 12 hours). But with Cialis, the screen of possibility ranges from 24 to 36 hours, and that’s why it is often called “the week-end drug.” Another small distinction is that while Viagra’s action might be delayed or weakened whenever taken with food (especially high-fat meals), that’s maybe not the situation with Levitra or Cialis.
Success prices. Because Viagra is available the longest, there’s more research available about this drug. Pooled information involving studies of 6,659 guys demonstrate that Viagra assisted 83percent of males have sex at least one time. Having said that, Viagra just isn’t a panacea. A 2001 research of its long-lasting effectiveness, within the Journal of Urology, reported a notably reduced overall rate of success (69%). The success prices for Cialis and Levitra (59% and 69%, correspondingly) act like those for Viagra.
Viagra has shown good for many males with erection dysfunction caused by spinal-cord accidents. In a single research, 83% of these males who took Viagra had enhanced erections. But also for males with diabetic issues or advanced cardiovascular disease, the medication assists just about 50 % of enough time. The reaction is also reduced — about 30per cent — for guys who’ve had radical prostatectomy.
Negative effects. Up to now, the potential risks and negative effects among these three medications be seemingly roughly equivalent. They all work by relaxing smooth muscle tissue cells, which widens bloodstream vessels — mainly when you look at the penis, but additionally various other areas of the body. Probably the most common side effects is a frustration, which happens in about 16% of users (see Figure 2). Other responses consist of flushing, upset belly, nasal congestion, and urinary system infections. Nevertheless when the medications are employed correctly, these negative effects are reasonably moderate, & most disappear after a couple of hours. Some men experience temporary, mild visual problems, mainly seeing a blue tinge, but also increased sensitivity to light and blurred vision in rare cases. Nonetheless, guys with retinitis pigmentosa, an eye that is rare, should really be really careful of utilizing these medications.
Figure 2: unwanted effects of Viagra
In 2005, reports linked Viagra used to another eye that is rare, nonarteric anterior ischemic optic neuropathy, which could cause loss of sight. But, less than 50 feasible situations had been reported at the time of 2006, weighed against the an incredible number of guys that have utilized erectile drugs without dilemmas. Nevertheless, these reports act as a reminder to guys over 50 to have regular attention check-ups also to alert your physician to your uncommon eyesight dilemmas after using a PDE5 inhibitor drug.
Medication interactions. Continue Reading