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About Brand Name Viagra®, Cialis® and Levitra®
There are 3 FDA approved PDE-5 inhibitors: Viagra, Cialis and Levitra. All three are generally quite safe, but caution should be exercised before and when using them - see page Caution!
PDE-5 inhibitors work by helping to relax compromised or hardened penile arteries thus allowing more blood to flow into the penis and subsequently causinge an erection. All three drugs also help keep high levels of cGMP (cyclic guanosine monophosphate) within the penis. cGMP is an incredible substance which is naturally produced by the penile tissue in response to sexual stimulation and which aids vascular muscle relaxation. When high levels of cGMP are present, the penile arteries become relaxed and a natural and stiff erection will occur.
Unfortunately the PDE-5 enzyme generally neutralizes available cGMP and without cGMP an erection will become flaccid or will not occur at all. PDE-5 inhibitors block the unwanted PDE-5 and hence the very much wanted cGMP is allowed to remain within the penis after sexual stimulation occurs, thus aiding the erection process and keeping the penis erect.
Comparing and contrasting the three PDE-5 inhibitors to determine their differences:
| Attribute | Viagra | Cialis | Levitra |
Generic Name:
Made By:
FDA Approved:
Effects Last:
Notable "Differences": |
Sildenafil Citrate
pFizer
1998
4 hours
Proven track record |
Tadalafil
ELi Lilly and ICOS
2003
17 to 36 hours
Longest lasting |
Vardenifil Hydrocloride
GlaxoSmithKline and Bayer
2003
5 hours
Quickest acting, food independent |
Note that the star ratings in this section apply to the on-line pharmacies supplying the tablets and not to the efficacy of the drugs themselves.
For your convenience products are grouped below in the following sequence:
All Viagra followed by all Cialis followed by all Levitra.
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Brand Name Viagra® from SelfServeRx 
SelfServeRx is an American based on-line pharmacy that has been operating for some years. SelfServeRx sells only certified prescription medications purchased directly from US manufacturers and works directly with US licensed doctors and pharmacies thus, as SelfServeRx say, "ensuring your safety".
Fully certified by Pharmacy Checker, SelfServeRx has an excellent record in rapid, reliable and secure product sales.
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Brand Name Viagra® from AmeriMedRx 
AmeriMedRx is an American medical company that has operated for many years.
It has a very good reputation, and the Hard And Upright Company can confirm that it is: offering value for money and very rapid delivery (FedEx options), discreet packaging, US licensed physicians and pharmacists, as well as free consultations from qualified staff (stated as a $50 value).
AmeriMedRx handles only brand name Viagra, Cialis and Levitra, and does not handle generics.
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Brand Name Viagra® from KwikMed (Money Orders & Most Credit Cards Accepted)
KwikMed has been dispensing on-line since 2001; it has over 200,000 satisfied customers.
Consultations are free. A U.S. licenced physician will review your online consultation and either approve or decline your Viagra prescription. If declined, there is no charge to you. If approved, you will be charged only for the product and its shipping fee - there are no hidden costs.
Fully certified by Pharmacy Checker, KwikMed handles only brand name Viagra, Cialis and Levitra, and does not handle generics.
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Brand Name Viagra® from Planet Drugs Direct 
Planet Drugs Direct has been dispensing on-line since 2001; and has over 400,000 satisfied customers.
Shipping on all orders is free, and there are no hidden costs. It is well staffed and provides toll free customer support and order lines.
Planet Drugs Direct is fully certified by Pharmacy Checker, and provides excellent, readily verifiable service.
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Brand Name Viagra® from Rx Easy Pharmacy*
Rx Easy Pharmacy has recently decided to withdraw from the on-line pharmacy business. It was a customer focused on-line pharmacy that gave good service. It provided rapid local and international delivery, secure on-line transactions and on-line order status tracking, and provided value for money - particularly for larger volume orders.
*For completeness we are including Rx Easy Pharmacy, but clearly as it no longer exists, we can no longer assess it (nor of course make any recommendations!).
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Brand Name Viagra® from Approved Medical*
Approved Medical has recently decided to withdraw from the on-line pharmacy business. Approved Medical was a customer focused on-line pharmacy that gave good service. It provided rapid local and international delivery, secure on-line transactions and on-line order status tracking, and value for money - particularly for larger volume orders.
*For completeness we are including Approved Medical, but clearly as it no longer exists, we can no longer assess it (nor of course make any recommendations!).
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Levitra
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Brand Name Cialis® from SelfServeRx
SelfServeRx is an American based on-line pharmacy that has been operating for some years. SelfServeRx sells only certified prescription medications purchased directly from US manufacturers and works directly with US licensed doctors and pharmacies thus, as SelfServeRx say, "ensuring your safety".
Fully certified by Pharmacy Checker, SelfServeRx has an excellent record in rapid, reliable and secure product sales.
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Brand Name Cialis® from AmeriMedRX
AmeriMedRX is an American Company that has operated as an online pharmacy for many years.
It has a very good reputation; offering value for money and very rapid delivery (FedEx options), discreet packaging, US licensed physicians and pharmacists, as well as free consultations (a $50 value).
AmeriMedRX handles only brand name Viagra, Cialis and Levitra, and does not handle generics.
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Brand Name Cialis® from KwikMed (Money Orders & Most Credit Cards Accepted)
KwikMed has been dispensing on-line since 2001; it has over 200,000 satisfied customers.
Consultations are free. A U.S. licenced physician will review your online consultation and either approve or decline your Cialis prescription. If declined, there is no charge to you. If approved, you will be charged only for the product and its shipping fee - there are no hidden costs.
Fully certified by Pharmacy Checker, KwikMed handles only brand name Viagra, Cialis and Levitra, and does not handle generics.
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Brand Name Cialis® from Planet Drugs Direct
Planet Drugs Direct has been dispensing on-line since 2001; and has over 400,000 satisfied customers.
Shipping on all orders is free, and there are no hidden costs. It is well staffed and provides toll free customer support and order lines.
Planet Drugs Direct is fully certified by Pharmacy Checker, and provides excellent, readily verifiable service.
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Brand Name Cialis® from Rx Easy Pharmacy*
Rx Easy Pharmacy has recently decided to withdraw from the on-line pharmacy business. It was a customer focused on-line pharmacy that gave good service. It provided rapid local and international delivery, secure on-line transactions and on-line order status tracking, and provided value for money - particularly for larger volume orders.
*For completeness we are including Rx Easy Pharmacy, but clearly as it no longer exists, we can no longer assess it (nor of course make any recommendations!).
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Brand Name Cialis® from Approved Medical*
Approved Medical has recently decided to withdraw from the on-line pharmacy business. It was a customer focused on-line pharmacy that gave good service. It provided rapid local and international delivery, secure on-line transactions and on-line order status tracking, and provided value for money - particularly for larger volume orders.
*For completeness we are including Approved Medical, but clearly as it no longer exists, we can no longer assess it (nor of course make any recommendations!).
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Brand Name Levitra® from SelfServeRx
SelfServeRx is an American based on-line pharmacy that has been operating for some years. SelfServeRx sells only certified prescription medications purchased directly from US manufacturers and works directly with US licensed doctors and pharmacies thus, as SelfServeRx say, "ensuring your safety".
Fully certified by Pharmacy Checker, SelfServeRx has an excellent record in rapid, reliable and secure product sales.
Note also that Levitra is recommended by the FDA for those with high levels of cholesterol, high blood pressure and/or diabetes.
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Brand Name Levitra® from AmeriMedRX
AmeriMedRX is an American Company that has operated as an online pharmacy for many years.
It has a very good reputation; offering value for money and very rapid delivery (FedEx options), discreet packaging, US licensed physicians and pharmacists, as well as free consultations (a $50 value).
AmeriMedRX handles only brand name Viagra, Cialis and Levitra, and does not handle generics.
Note also that Levitra is recommended by the FDA for those with high levels of cholesterol, high blood pressure and/or diabetes.
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Brand Name Levitra® from KwikMed (Money Orders & Most Credit Cards Accepted)
KwikMed has been dispensing on-line since 2001; it has over 200,000 satisfied customers.
Consultations are free. A U.S. licenced physician will review your online consultation and either approve or decline your Levitra prescription. If declined, there is no charge to you. If approved, you will be charged only for the product and its shipping fee - there are no hidden costs.
Fully certified by Pharmacy Checker, KwikMed handles only brand name Viagra, Cialis and Levitra, and does not handle generics.
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Brand Name Levitra® from Planet Drugs Direct
Planet Drugs Direct has been dispensing on-line since 2001; and has over 400,000 satisfied customers.
Shipping on all orders is free, and there are no hidden costs. It is well staffed and provides toll free customer support and order lines.
Planet Drugs Direct is fully certified by Pharmacy Checker, and provides excellent, readily verifiable service.
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Brand Name Levitra® from Rx Easy Pharmacy*
Rx Easy Pharmacy has recently decided to withdraw from the on-line pharmacy business. It was a customer focused on-line pharmacy that gave good service. It provided rapid local and international delivery, secure on-line transactions and on-line order status tracking, and provided value for money - particularly for larger volume orders.
*For completeness we are including Rx Easy Pharmacy, but clearly as it no longer exists, we can no longer assess it (nor of course make any recommendations!).
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Brand Name Levitra® from Approved Medical*
Approved Medical has recently decided to withdraw from the on-line pharmacy business. It was a customer focused on-line pharmacy that gave good service. It provided rapid local and international delivery, secure on-line transactions and on-line order status tracking, and provided value for money - particularly for larger volume orders.
*For completeness we are including Approved Medical, but clearly as it no longer exists, we can no longer assess it (nor of course make any recommendations!).
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