Viagra is a medication that is used to help treat men suffering from erectile dysfunction or ED. Viagra is a brand name for a generic form called Sildenafil. Viagra is a prescription drug that is prescribed by a licensed physician. Viagra works by increasing and individual's blood flow in the penis so that the penis will fill with blood and create and keep an erection hard enough to have sexual intercourse. Viagra only works when an individual is sexually stimulated. If there is no sexual stimulation, no erection will occur. It has been shown that it may take up to four hours before sexual activity.
How to use Cialis?
Viagra, or sildenafil, is prescribed to be taken when needed, typically 30 minutes to an hour before partaking in sexual activity. It is recommended that individuals do not take Viagra more than once per day. The medication should be stored properly, being stored at room temperature and away from temperature moisture and heat, and should not be stored in the bathroom.
What are side effects of Viagra?
There are numerous side effects of Viagra, both common and uncommon. Approximately 15% of individuals taking Viagra will experience side effects. The most common side effects of Viagra include headache, flushing or reddening of the skin, upset stomach, stuffy or runny nose, back pain, muscle pain, nausea, or abnormal vision such as changes in color vision and blurred vision. Some uncommon and more severe side effects include heart attack, stroke, irregular heartbeat, and death have happened before from taking Viagra. It is recommended that men with heart problems should talk with a doctor before taking Viagra. IT is also recommended that individuals allergic to its ingredients or if taking another nitrate medication should avoid taking Viagra or Sildenafil.
Is Cialis a great alternative for Viagra?
There are other medications that have been shown to help treat erectile dysfunction, such as Cialis, or generic drug called tadalafil. Both Viagra and Cialis are phosphodiesterase-5 (PDE5) inhibitors that are used to treat impotence, or erectile dysfunction. Cialis has been shown to provide the ability to obtain an erection for a longer period of time compared to Viagra, with Cialis lasting up to 18 hours while Viagra only lasts for about 4 to 6.
How to buy Viagra online in Australia?
Both Viagra in Australia and Cialis can be purchased at a general pharmacy store with a prescription from a licensed physician. Viagra and Cialis can also be purchased online at stores such as lemonaidheath.com. A website called findviagra.com can slo help find cheaper generic Viagra, or sildenaphil, online. Viagra is described as a small, blue, diamond-shaped tablet with the inscription of VGR 50, VGR 25, and VGR 100 with the numbers being the content of active ingredient in milligrams in the medication. So, medication can be purchased at doses of 25, 50, and 100 mg. Other doses include 120mg, 130mg, 150mg, and 200mg.
Viagra, Cialis og Levitra sammenligning
I denne tabel kan du se forskelle i farmakodynamik og farmakokinetik phosphodiesterese hæmmere. Du kan se, at tadalafil (Cialis) begynde at handle senere end andre PDE-5-medicin, men Tadalafil ikke mister effekten, hvis der tages med fed mad og alkohol. Også Tadalafil har langtidsvirkende perod 18×2 = 36 timer. Disse fordele gør det til det bedste valg til daglig brug i oral behandling mænd med erektil dyfunction. I dette tilfælde er Viagra meget sikker.
Sildenafil | Vardenafil | Tadalafil | |
Handelsnavn | Viagra | Levitra | Cialis |
Hæmmer PDE-5 | ja | ja | ja |
Hæmmer PDE-6 | ja | minimalt | Nej |
Hæmmer PDE-11 | ingen | ingen | ja |
Tid til peak plasma niveau (timer) | 0.5-1 | 0.7-0.9 | 2 |
Fedtholdige måltid nedsætter satsen for oral absorption? | ja | ja | ingen |
Middel plasmahalveringstid (timer) | 3.7 | 4.4-4.8 | 18 |
Procent af dosis udskilt i fæces | 80 | 91-95 | 61 |
Procent af dosis udskilles i urinen | 13 | 2-6 | 36 |
Varighed (timer) | 4 | 4 | 24-36 |
Sædvanlig daglig dosis | 25-100mg | 5-20mg | 5-20mg |
Daglig dosis hos patienter ≥ 65 år | 25mg | 5mg | 5-20mg |
Daglig dosis ved moderat nedsat nyrefunktion | 25-100mg | 5-20mg | 5mg |
Daglig dosis ved svær nedsat nyrefunktion | 25mg | 5-20mg | 5mg |
Daglig dosis ved let nedsat leverfunktion | 25-100mg | 5-20mg | 10mg |
Daglig dosis ved moderat nedsat leverfunktion | 25-100mg | 5-10mg | 10mg |
Daglig dosis ved svær leverinsufficiens | 25mg | ikke vurderet | anbefales ikke |
Dosis hos patienter, der tager cytokrom P450 3A4 inhibitorsa | 25mg dagligt | 2.5-5mg i 24-72 timer | 10mg i 72 timer |
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