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. 

Sildenafil farmakokinetik

Sildenafil (den vigtigste aktive komponent i Viagra) absorberes hurtigt efter en oral dosis med en biotilgængelighed på omkring 45%. Peak plasmakoncentration nåsinden for 20 til 100 minutter.
Af absorptionshastigheden reduceres, når sildenafil gives sammen med mad.
Sildenafil er vidt udbredt i væv og er omkring 98% bundet til plasmaproteiner. Detmetaboliseres i leveren hovedsageligt af cytokrom P450 isoenzymer CYP3A4 (destore vej) og CYP2C9. Hovedmetabolitten, N-desmethylsildenafil (UK-103.320) ogsåhar nogle aktiviteter. Den terminale halveringstider af sildenafil og N-desmethylmetabolitten er ca 4-5 timer. Sildenafil udskilles som metabolitter, primært i FAE-
CES, og i mindre grad i urinen. Clearance kan være reduceret hos ældre og hos patienter med nedsat lever-eller svær nyreinsufficiens.

 

Sildenafil

Sildenafil

Viagra clearance er nedsat hos patienter med nedsat leverfunktion. Sikkerhed er ikkeblevet fastslået hos patienter med svær leverinsufficiens (Child-Pugh klasse C), ogdets anvendelse er kontraindiceret hos disse patienter af denne grund.
Licenseret produkt information til patienter med erektil dysfunktion anbefaler enindledende dosis på 25 mg (100 mg maksimale dosis) hos patienter med nedsatleverfunktion.

Video guide: prefessional Sildenafil gennemgang på YouTube

httpv://www.youtube.com/watch?v=8PUUAE7wYOc

Sildenafil clearance er nedsat hos personer med svært nedsat nyrefunktion. Viagra produktinformationen for patienter med erektil dysfunktion anbefaler, at disse patienter,bør en initial dosis på 25 mg overvejes. I Danmark hedder det, at dosis kan øges til 50eller 100 mg, hvis det er nødvendigt og tolereres.


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