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Buy Sildenafil Online (Generic Viagra)

An erectile dysfunction medication that’s FDA approved and clinically proven to treat ED, sildenafil has the same active ingredient as Viagra® at 5% of the cost. Better sex at a lower price—what’s not to love? Patients can buy Sildenafil after the included telemedicine consultation.
Benefits of Sildenafil
  • FDA-approved treatment for ED
  • Improves Erectile Function
  • Increases Confidence
Dosage Information

Flexible dosage options (25mg, 50mg, or 100mg)

Common Sildenafil Side Effects
  • Headaches
  • Heartburn
  • Diarrhea
  • Flushing
  • Nosebleeds
  • Insomnia
*Prescription medications available only if prescribed by the healthcare provider after an online consultation.

What’s Included

When you buy Sildenafil from Invigor Medical, you can rest assured that you are working with a licensed, experienced, and dedicated doctor and receiving sildenafil from a U.S.-based, FDA 503B-registered pharmacy.
Rx Consultation

Discuss your treatment plan with one of our licensed practitioners.


All medications and supplies included, no hidden fees.


Our well-trained medical staff are ready to answer your questions. 

Single Purchase
30 Pills
30 Pills
Single Purchase
90 Pills

Benefits of Sildenafil

Sildenafil is an FDA-approved, generic brand of Viagra with a proven history to treat ED.

  • Improves Erectile Function
  • Increases Confidence
buy Sildenafil
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What users are saying about Sildenafil

Signs You Might Need This Treatment Plan


You may be experiencing a combination of the following symptoms
  • Erectile Dysfunction
If you are experiencing any of the symptoms listed above, please fill out our medical forms. After that, an Invigor Medical specialist will contact you.

Sildenafil FAQs

The Plan
Does sildenafil work as good as Viagra?

Sildenafil is the generic brand of Viagra. The Food and Drug Administration (FDA) requires that generic drugs be bioequivalent to brand-name medications. Therefore, the generic drug must have the same active ingredient, strength, and dosage. Because patent restrictions have expired, generic medications can be offered at a lower price than brand-name medications.

How long does sildenafil last for?

Sildenafil wears off in about four hours. Most men take sildenafil about one hour before anticipated sexual activity. It takes about 30 minutes to work, and the effects last for about four hours.

It is important to differentiate the effects of the medication from an erection. Sildenafil requires sexual stimulation to work. Once it does, an erection should not last more than four hours. Prolonged, painful erections can cause damage to the penis.

Can I take sildenafil daily?

The recommended adult dose for sildenafil is one 50mg tablet daily as directed. The maximum recommended dose is 100 mg daily.

Your healthcare provider will determine the best sildenafil dosage for you based on your past medical history and any medications you may be taking. It is important to not take more sildenafil than is prescribed and not take a dose more than once every 24 hours.

Can I drink alcohol with sildenafil?

The side effects of some ED medications, such as sildenafil, can be made worse when combined with alcohol. These side effects may include:

  • Lower blood pressure
  • Dizziness
  • Lightheadedness
  • Fainting
  • Flushing
  • Headache
  • Heart palpitations

To decrease your risk of side effects, avoid or limit the use of alcohol when taking sildenafil. However, if you drink alcohol regularly, talk to your healthcare provider about ED treatment options that do not adversely interact with alcohol.

Is it OK to take 100mg of sildenafil?

Yes, if your healthcare provider prescribes 100 mg. Sildenafil 100 mg is the highest safe dose. If sildenafil is not working at the prescribed dose, contact your healthcare provider before changing the dose. Your healthcare provider may also suggest a different ED medication. For example, some men find that Trimix or tadalafil is a better option.

What should you avoid while taking sildenafil?

Alcohol consumption can increase the risk of side effects when taking sildenafil. If you consume alcohol regularly, discuss your use with your healthcare provider to see if sildenafil is your best option.

Grapefruit and grapefruit juice can change how sildenafil is metabolized in the body. Grapefruit can raise sildenafil levels in your body and lengthen the time it takes for sildenafil to work.

Does sildenafil raise your heartrate?

Changes in heart rate are minimal after taking sildenafil. Researchers noted minor increases in heart rate when younger men took sildenafil after exercise and slighter larger increases in heart rate when older men took sildenafil.

Sildenafil, especially when taken with alcohol, can lower blood pressure. Men who experience this side effect will notice an increase in heart rate along with lightheadedness and dizziness.

Men may also experience palpitations or the sensation that the heart is beating harder or faster. Drinking an extra glass of water may help.

Report any concerning side effects to your healthcare provider.

Who should not take sildenafil?

Sildenafil should not be used with any other medication used to treat ED. Tell your healthcare provider about all medical problems and medications you are taking. There are many drug interactions with sildenafil. 

Contraindications for prescribing or using Sildenafil include:
• Bleeding disorders
• Eye or vision problems
• Peyronie’s disease
• History of priapism
• Heart disease
• Stomach ulcers
• Kidney disease
• Liver disease
• Stroke
• An allergic reaction to sildenafil or any of its components
• Taking St. John’s wort

Invigor Medical
Do I need a prescription before I buy from Invigor Medical?

No, Invigor Medical employs doctors licensed in all 50 states, and a medical consultation is included with each medical service. Each patient will receive a valid prescription, which is sent to the pharmacy to be filled.

How long does it take to get my medication?

Once you have enrolled for medical services with Invigor Medical, it usually takes 7-14 business days before items arrive at your home. This process includes an online medical consultation, prescription approval, the medication getting filled at the pharmacy, and the medication being sent to your home.

How do I know if I will be approved?
Most of the services that Invigor Medical offers are elective services. This means that most clients, if there are no restrictive contraindications, will be approved for the medications of their choice.
More Questions?
Fill out the form below, and one of our treatment specialists will contact you.

What is Sildenafil?

Sildenafil is Generic Viagra

Sildenafil is a phosphodiesterase (PDE) class 5 inhibitor. Medications in this class are used to treat erectile dysfunction, pulmonary artery hypertension, benign prostatic hypertrophy (BPH), or the concurrent treatment of erectile dysfunction and BPH.

Sildenafil (generic for Viagra) is a lower-cost alternative to Viagra that contains the same active ingredients. It works exactly the same way as the brand-name medication in your body.

How Does Sildenafil Work?

Blood Flow is Essential to Get and Maintain an Erection

An erection is the result of increased blood flow into the penis. Sexual stimulation increases blood flow into the penis, temporarily trapping it in spaces called the corpus cavernosum. These spaces make up most of the penis and surround the urethra, the tube shared by both the urinary and the reproductive systems.

Smooth muscle lines the small blood vessels called capillaries that enter the penis, contracting and relaxing to decrease or increase blood flow through them. Damage to these blood vessels from diabetes, high blood pressure, or lipid deposits can reduce blood flow.

When blood enters the penis and fills the corpus cavernosum, the swollen tissue presses on blood vessels draining the penis. This process results in vasocongestion or holding blood in the penis. The pressure within the penis increases, and it becomes rigid.

Sildenafil Promotes Blood Flow into the Penis

Nitric oxide is a small molecule found throughout the body. It is released from nerve endings near the blood vessels in the corpus cavernosum of the penis after sexual stimulation. Nitric oxide triggers a chemical cascade that dilates blood vessels and increases blood flow into the penis, resulting in an erection. cGMP (another chemical in the cascade) levels must remain high to maintain the erection. Phosphodiesterase inactivates cGMP. When cGMP is deactivated, the smooth muscles in the walls of small blood vessels contract, reducing blood flow and ending the erection.

Oral ED medications, such as sildenafil, are phosphodiesterase inhibitors. By inhibiting phosphodiesterase, nitric oxide continues to trigger the cascade, and blood flow into the penis is maintained, meaning a firm erection. Understanding this cascade led to the development and subsequent FDA approval of sildenafil in 1998.

Included with the Plan

No Hidden Fees

Free Doctor Consult

The consultation with the practitioner is always included when you buy Sildenafil.

Medical Support

Medical Support

Our friendly staff are knowledgeable and available to answer any questions.

Supplies Included

Supplies Included

When you purchase Sildenafil, all required supplies are always included.

No Doctors Office Visit Required

No Doctor's Office

Skip the in-person doctor’s visit, consult remotely, and get Sildenafil shipped directly to you.

Licensed Pharmacies

Licensed Pharmacies

Our U.S. based, FDA-registered pharmacies provide quality meds tested for purity and potency.

Free Doctor Consultation

Licensed Doctors

Our licensed doctors cover all 50 states and are very well versed with the medications we offer.

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Men and women of all ages can often struggle with knowing how to turn their partners on.  Mismatched cycles of desire, natural variations in desire over time, different priorities and issues,...