Sildenafil 100mg

What is Viagra?

Viagra is the brand-name version of sildenafilTrusted Source. Doctors usually prescribe Viagra to help relieve erectile dysfunction, which causes a person to have difficulty getting or keeping an erection. Following sexual stimulation, taking Viagra helps increase blood flow to the penis, which can help individuals maintain an erection for sexual intercourse. However, doctors do not recommend taking more than one dose of Viagra daily. This drug can start working within 30 minutes, and its effects can last for 4 hours. Although doctors usually prescribe 50 milligrams (mg) of Viagra, they may lower this to 25 mg or increase it to 100 mg.

How to buy Viagra online

People can purchase Viagra online from several online pharmacies and telehealth companies. However, the drug is only available with a prescription. Some online pharmacies can fill an electronic prescription and notify the person when Viagra is available for collection at their local pharmacy. Other online pharmacies offer delivery to the person’s door. If a person does not have a current prescription, some online pharmacies and telehealth companies may offer an online consultation with a doctor through a phone or video call. This consultation may lead to the doctor writing a prescription for Viagra, which the company can then fill. People should never purchase Viagra from companies that do not require a prescription. One 2012 study found that 77% of Viagra sold online from companies that did not require a prescription was counterfeit.

In addition to companies not requiring a prescription, some other warning signs that the Viagra a person buys online may not be genuine include the following:

  • The company ships the Viagra from a different address than where it claims to be based.
  • The Viagra does not come with a product information leaflet.
  • The Viagra does not come with any safety warnings.
  • Therefore, people should research companies that sell Viagra to ensure that they are not buying counterfeit drugs before purchasing.

List of products

There are several online pharmacies and telehealth companies that offer Viagra for sale online. A person needs a prescription to purchase this drug. Please note that the writer of this article has not tried any of these products. All information presented here is purely research-based. Roman offers various treatment options for conditions such as erectile dysfunction, hair loss, and premature ejaculation. The company uses United States-licensed healthcare professionals to run its pharmacy service.

To order from Roman, a person describes their symptoms to a licensed physician or nurse practitioner for evaluation. Within 24 hours, the healthcare professional contacts the individual to discuss treatment options. This service is free of charge with free unlimited follow-up appointments.

Roman offers Viagra and generic sildenafil in 25-, 50-, or 100-mg doses. The healthcare professional who assesses an individual’s case can suggest which dose is most suitable for that person. The company then sends the medication using discreet packaging. Hims is an online pharmacy service that caters to men’s wellness.

This company sells Viagra on a prescription-only basis. Individuals must first have an online consultation with a local licensed physician to receive a prescription if they do not already have one. Hims states that the online consultation does not take a long time. A person must first answer questions about their medical history and symptoms before being connected with a healthcare professional. For this consultation, the individual needs proof of identity and a credit card.

This consultation and any shipping are free. Hims sends all medications in discreet packaging. The company also sells Viagra and generic sildenafil in various doses through its website.

People who use Viagra may notice that they find it easier to get and keep an erection. However, people should also discuss any potential safety considerations with a healthcare professional before using this drug. The sections below look at some advantages and disadvantages of using Viagra in more detail.


Several clinical studies have investigated the effect of Viagra on erectile dysfunction. Research suggests that people who take this drug may be more likely to get and maintain an erection than those who do not.

Although the percentage of people who find that Viagra helps them differs depending on the dose they take, all doses seem to be more effective than not taking Viagra at all.

Additionally, in the clinical studies, while the number of times per week the participants had penetrative sex did not change during the course of taking Viagra, the participants did report more success in maintaining an erection.

Viagra may not be suitable for everyone, including those who:

  1. have ever had an allergic reaction to Viagra or sildenafil
  2. take nitrates or nitroglycerins
  3. have a heart or liver condition
  4. have had a stroke or heart attack
  5. have low blood pressure
  6. have one of several rare inherited eye conditions, including retinitis pigmentosa

Also, Viagra or sildenafil can cause some side effectsTrusted Source, including:

  1. headaches
  2. skin flushing or rash
  3. indigestion
  4. nasal congestion
  5. back pain and muscle pain
  6. nausea
  7. dizziness

Learn more about the safety and side effects of Viagra here. Viagra is not suitable for females or children. Because Viagra is a prescription medication, a doctor will discuss any potential side effects and other safety considerations with each individual before prescribing this drug. A person needs to contact a doctor to receive a prescription for Viagra or sildenafil. The doctor can recommend which strength is most suitable, and a person can have follow-up consultations to ensure that the drug and dose are still suitable for their condition. A doctor can also advise a person on whether or not Viagra or sildenafil may interact with other medications or any recreational drugs or dietary supplements they are currently using. In some cases, Viagra or sildenafil can cause serious side effects.

If a person experiences any of the following, they should seek immediate medical attention:

  • chest pain
  • painful erections or erections that last for longer than 4 hours
  • vision loss
  • fever
  • swelling and peeling of the skin
  • blisters in and around the mouth, genitals, and eyes
  • anaphylaxis, which is a serious allergic reaction

Below are some of the most common questions and answers about Viagra. No, Viagra is not available over the counter in the U.S. It requires a prescription. 
Viagra can also interact with other medications. For this reason, people should speak with a healthcare professional before taking Viagra. Viagra may start working within 30 minutes. Viagra’s effects can last for around 4 hours.