Sildenafil
Erectile Dysfunction|Active ingredient(s): Sildenafil|Manufacturer: Various
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Sildenafil
What is Sildenafil?
Sildenafil is an effective treatment for erectile dysfunction. Commonly sold under the brand name Viagra, it helps many men worldwide achieve stronger erections. With its fast onset of action and straightforward dosing, millions in Europe trust Sildenafil to improve their sex lives.
How does Sildenafil work?
Sildenafil works by increasing blood flow to the genitals when you’re sexually aroused. It does this by widening blood vessels and relaxing muscle tissues in the penis, which makes it easier to get and maintain an erection.
Contrary to popular belief, Sildenafil doesn’t automatically trigger an erection. It only works in response to sexual stimulation. This means you should only feel the effects when you need to.
How effective is Sildenafil?
Clinical trials have found Sildenafil to help up to 82% of men with erectile dysfunction achieve an erection within 45 minutes.
Here are the full results of this study:
- 71% of patients achieved an erection within 30 minutes.
- 82% of patients achieved an erection within 45 minutes.
- The average time erections lasted was around 20 minutes.
How long does Sildenafil take to work?
Usually, you should feel the effects of Sildenafil within 30-60 minutes of taking your tablet, with effects peaking at 1-2 hours.
This is the average effect. However, a few things can make it work faster or slower:
- Food: Taking Sildenafil on an empty stomach can help it work more quickly, while taking it after eating a heavy meal can make it take longer.
- Alcohol: Large amounts of alcohol can delay the effects of Sildenafil, reduce blood flow, and make it less effective.
- Age: It may take longer for older men to feel the effects due to slower metabolism and reduced blood flow.
How long does Sildenafil last?
Sildenafil should last for around 4 hours. You can have sex multiple times during this period, and it will be just as effective as the first time.
If the effects last longer than 4 hours, or you experience an erection that doesn’t go down, seek immediate medical help.
Who can take Sildenafil?
To be prescribed Sildenafil, you must be over 18 years old and suffer from erectile dysfunction.
Do not take Sildenafil if you have:
- An allergy to sildenafil citrate
- A severe heart or liver problem
- Low blood pressure
- Recently had a stroke or heart attack
What dose should I take?
There are 3 doses of Sildenafil available. Consult this table to see which one is right for you:
| Dose | When it’s prescribed | Who it’s prescribed for |
|---|---|---|
| 50 mg | Recommended starting dose | Most healthy men aged 18-65 |
| 25 mg | If 50 mg is too strong | At-risk groups (over 65, liver or kidney problems, etc.) |
| 100 mg | If 50 mg is too weak | Healthy adults under 65 who don’t respond to 50 mg |
Can you take Sildenafil daily?
There shouldn’t be any problems if you take this medication every day, but you should consult your doctor first if you plan to use it for a long time. Daily use of Sildenafil is not usually necessary and rarely advised.
IMPORTANT:
Do not take more than 1 Sildenafil tablet per day, no matter the dose. Doing so can be dangerous.
Are there any side effects of Sildenafil?
Most people won’t experience side effects from Sildenafil, but they can happen. The most common Sildenafil side effects include:
- headache
- nausea
- hot flush
- indigestion
- vision changes
- stuffy nose
- dizziness
For a full list of side effects, consult the patient information leaflet.
Will Sildenafil raise blood pressure?
Sildenafil does not typically raise blood pressure. In fact, studies show it will likely lower blood pressure, since it relaxes and widens blood vessels.
For this reason, a doctor may not prescribe Sildenafil to men currently taking nitrates or other medications that can lower blood pressure. Remember to tell your doctor about any other medicines you take in your consultation to ensure safety.
Can I buy Sildenafil without a prescription?
Safety is our number one priority at 121doc. For this reason, our doctors will only prescribe you treatment if you meet the criteria in your online consultation.
A prescription from a trusted healthcare provider like 121doc ensures:
- safety during treatment
- effective results
- monitoring of side effects

Note: You must complete a short online consultation so that our doctor can ensure that the treatment is suitable for you. The above pricing should only be used as a reference. The final decision to issue this treatment lies with the prescribing doctor.
Sildenafil Overview
| Type of medicine | PDE5 inhibitor |
| Used for | Erectile dysfunction |
| Active ingredient | Sildenafil |
| Works by: | Relaxing blood vessels and increasing blood flow to the penis when sexually stimulated |
| Effective within | 30-60 minutes |
| Available as | Tablets |
| Available dosages | 25 mg, 50 mg, 100 mg |
| Usage instructions | Take one tablet 30-60 minutes before you plan to have sex |
| Packaging | BLister packs |
| Branded available? | Yes, Viagra |
FAQs
What is included in the online consultation?
Will a doctor review my consultation?
What happens after I submit my order?
What services are included with my order?
Is the price all-inclusive?
What are my delivery options?
Is it safe to buy prescription medication online?
Is this service discreet?
Our online consultations are in the format of short medical questionnaires. You will be asked general questions about your health and medical history, as well as specific medical questions relevant to the treatment you have chosen. We will also ask you for your payment and delivery details to complete the order.
Online consultations take no longer than 5 minutes to complete. All questions are necessary when issuing prescription medicines. It means that our doctors can make sure the treatment is safe and right for you.
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How does it work?
What you need treatment for:
On each page, we provide information as well as treatment options we currently offer. To begin your consultation, select what you need treatment for from the top menu and simply choose "Start consultation" on the selected page.
Treatments:
You can read more about our treatment options on our treatment information pages. To search for a specific medication, simply use the search function.
You will be presented with your recommended treatment option(s) after completing your online consultation.
Ordering:
Every order starts with an online consultation. We will ask you medical questions to make sure that only treatments that are safe and effective are prescribed. We take into account your lifestyle, health and any other medications you’re currently using.
The consultation is completely free and takes between 5 and 10 minutes of your time.
All your information is safe with us. We don’t share it with anyone unless you want us to.
Help:
If you need any guidance, you can call, message or email our customer service team via the ‘How can we help you?' section here.
Review:
As soon as you place your order, one of our doctors will review your consultation.
Questions:
If the doctor has any additional questions, you will receive a phone call or an email. We understand you might be at work or busy. Our customer service representatives are always discreet and can contact you at a more convenient time if necessary.
Our emails never contain any personal or medical information, only a link to your private account on our website (where you will find your messages).
Pharmacy:
Once our pharmacy receives your prescription and dispatches your treatment, you will receive a second email with the tracking number.
Always free. Discreet packaging.
Free:
Express delivery is included with all orders. Alternatively, you can select a delivery date that suits you better.
Convenient:
You can check the estimated delivery time using your tracking number. All we need is your signature (or a friend's or family member's).
Discreet:
All parcels are plainly labelled; there is no logo or any indication of their contents.
Repeat:
With 121doc’s Subscribe & Save service, you can automatically receive your treatment every few weeks or months.
The order will be generated by us, using the information you provided (including delivery frequency). You don’t have to do anything. Payment is taken two days before shipping.
Subscribe:
There are two ways to subscribe. The first is during the order process. The second is via your profile here.
You can cancel or amend your repeat prescriptions at any time.
Save:
There are no sign-up fees with this service. Plus, you get a 10% discount off all future prescriptions, increasing to 15% after six orders!