Doublewin Biological Technology Co., Ltd.(expird)
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Business Type:Lab/Research institutions
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Country: 
China (Mainland)
Business Type:Lab/Research institutions
CAS NO.224785-90-4
1. We have experience in exporting steroids, as you know, EU places much emphasis on them, and you must find a experienced partner who will assure you;
2. Quality: Our company is a professional leading factory in China in pharmaceutical area, We had stable customers and exported to Germany, Spain, UK, USA, Australia, Middle East, and any other countries. We can provide good references about our company. As for the quality of the products, we 're sure they can satisfy you well enough;
3. Package: Professional packing with professional materials
4. Delivery: We have products in stock, and we will deliver them soon when your PO arrived.
Meanwhile we will give you the tracking number in order to make you know the exact location of the products. We will keep track of the product until they arrive you; We choose the best courier service for you, and with the delivery around 4-7 working days.
5. Service: Best Service with after-sales service and consultation.
Product Details:
Product Name: Vardenafil
Vardenafil Alias: Fardenafil, Levitra
CAS NO.: 224785-91-5
Molecular Formula: C23H32N6O4S
Appearance: White to almost white crystalline powder, odorless, a little acerbity
Solubility: soluble in water, ethanol
Use: It is pharmaceutical raw material, indicated for the treatment of erectile dysfunction.
Place of Origin:China
Certification:GMP,ISO9001,KOSHER
Payment & Shipping Terms:
Minimum Order Quantity: Negotiation
Price:Negotiation
Packaging Details:Discreet disguised package or as required
Delivery Time:Within 24 hours after payment
Payment Terms:T/T, , MoneyGram,,Bitcoin
Supply Ability:Mass stock
What is vardenafil
vardenafil relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body.
vardenafil is used to treat erectile dysfunction (impotence).
vardenafil may also be used for purposes not listed in this medication guide.
Treatment of ED:
Vardenafil's indications and contra-indications are the same as with other PDE5 inhibitors; it is closely related in function to sildenafil citrate () and tadalafil (Cialis). The difference between the vardenafil molecule and sildenafil citrate is a nitrogen atom's position and the change of sildenafil's piperazine ring methyl group to an ethyl group. Tadalafil is structurally different from both sildenafil and vardenafil. Vardenafil's relatively short effective time is comparable to but somewhat longer than sildenafil's.
Beyond its indications for erectile dysfunction, vardenafil may be effective in the treatment of premature ejaculation, where it may significantly increase the time from penetration to ejaculation.
How Does Vardenafil Work
It has a mechanism of action that is similar to sildenafil (), and tadalafil (Cialis). Penile erection is caused by the engorgement of the penis with blood. This engorgement occurs when the blood vessels delivering blood to the penis increase in size and increase the delivery of blood to the penis. At the same time, the blood vessels carrying blood away from the penis decrease in size and decrease the removal of blood from the penis. Sexual stimulation that leads to the engorgement and erection causes the production and release of nitric oxide in the penis. Nitric oxide then activates the enzyme, guanylate cyclase to produce cyclic guanosine monophosphate (cGMP). The cGMP is primarily responsible for increasing and decreasing the size of the blood vessels carrying blood to and from the penis, respectively. Vardenafil prevents an enzyme called phosphodiesterase-5 (PDE-5) from destroying cGMP so that cGMP persists longer. The longer cGMP persists, the more prolonged the engorgement of the penis. Vardenafil was approved by the FDA in August 2003.
Vardenafil Dosage
Patients taking Levitra are usually started on a 10 mg dose, which they take no more than once daily, about one hour before sexual activity. It can take as little as 30 minutes for Levitra to work in some patients. Like with , Levitra dosages are adjusted depending on a person's reaction, with doctors generally decreasing doses to to 2.5 mg or increasing them to no more than 20 mg once a day.
Vardenafil, as with all PDE5 inhibitors, should not be used by men taking nitrate medications, because combining them with Vardenafil might provoke potentially life-threatening hypotension (low blood pressure).
Contraindications:
This medication is a highly effective treatment for erectile dysfunction (impotence) in men. However, it is not meant for everyone. Here are a few warnings to consider before taking Levitra:
Do not take this drug if you are being treated with other medications that contain nitrates
Do not use this medication if you suffer from retinitis pigmentosa
Avoid this product it if you are allergic to vardenafil or any other ingredients in this medicine
Do not use if you have a history of severe heart, kidney and liver problems
Do not take this medicine if you are taking drugs for HIV or fungal infections
Avoid if you have non-arteritic anterior ischaemic optic neuropathy (NAION)
Do not use if you have a condition that causes bleeding such as a stomach ulcer
Do not consume if you have sickle cell disease, bone cancer or leukaemia.
Possible Side Effects:
Levitra tablets are not known to have any serious side effects and, as a matter of fact, they probably exhibit the least negative side effects when compared to any other erectile dysfunction treatment. Mild side effects may include dizziness, facial flushing, blocked nose, nausea, impaired vision and upset stomach. If experienced, these side effects should subside within a few hours. Major side effects such as erections that last more than 4 hours, temporary vision loss or impairment of hearing are very rare. If you ever experience such effects, you need to report these immediately to a doctor