Generic drugs are medications that have nearly the same chemical formula as their brand name drug counterparts, but can be produced by any drug manufacturer in the world. A generic drug comes into existence when the patent for the brand name drug expires. They are almost always just as effective as their brand name counterparts, but are considerably cheaper because the larger pharmaceutical companies have already paid for the overhead necessary or research.

Some of the more popular generic drugs are those that help to enhance sexual performance. There were millions of visits to doctor's offices from people inquiring about Viagra. In time, other drugs that performed a similar function arose such as Cialis and Levitra. The patent has expired on these name brand drugs and now generic alternatives are available.

Viagra is also known generically as sildenafil citrate. Generic Levitra is called vardenafil HCl and 시알리스 구입 generic Cialis is called tadalafil. All of these drugs serve the same purpose which is the treatment of erectile dysfunction. They have slight differences, 시알리스 구입 but the generic versions are nearly identical to the brand name versions except that they may contain some different inert ingredients.

Vardenafil HCl is the fastest acting of the three medications. It can work in less than twenty minutes. Tadalafil and sildenafil citrate can take thirty to sixty minutes to take effect. Tadalafil, however, can work for up to thirty-six hours which is at least six times the duration of the other drugs.



Side effects are a consideration when determining which of these medications is most appropriate. Sildenafil citrate, while proven to be very effective, has a number of restrictions and side effects. One of the most prominent is that it may cause discolored vision. It also cannot be taken with alcohol or with food. This limits the activities that can be taken before taking the medication. However, it is in such widespread production that it is very inexpensive.

All of these medications may interact negatively with other drugs that contain nitrates or drugs which are prescribed for heart or blood pressure conditions. A medical professional should be consulted to make sure there are no harmful interactions when taking these medications with other prescription drugs.

These medications are designed to help men who are experiencing erectile dysfunction. They are not intended to be used purely for sexual enhancement since this may cause a dangerous change in blood pressure. If when taking one of these medications any serious side effects are experienced, stop taking the drug immediately and seek out professional medical attention.








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