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Viridal (Alprostadil) Duo

Viridal (Alprostadil) Duo

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Buy Viridal Duo (Alprostadil) (10mcg, 20mcg, 40mcg) Online in the UK 


Order Viridal Duo (Alprostadil) online from Cured Pharmacy to help you cope with symptoms of erectile dysfunction (ED) in men. 


The Viridal Duo injections are available in 10mcg, 20mcg, and 40 mcg doses. These treatments are used to treat men who cannot get or keep an erect penis suitable for sexual activity. 

This treatment is only available with a prescription, sold through our fast and discreet online service. 

What is Viridal Duo? 


Viridal Duo contains an active ingredient called Alprostadil, which is a type of vasodilator – a medicine that opens up blood vessels for increased supply of blood. 

The drug comes in a two-chamber glass cartridge, which consists of Alprostadil in one chamber and a sodium chloride solution in the other. 

When these compartments are mixed, they form an injectable solution, which createsready-to-use injection that is intended for intracavernosal application. 

Before you begin treatment with Viridal Duo, your healthcare provider must show you how to correctly prepare and inject the medication. Proper training is essential to ensure safe and effective use at home. 

Viridal Duo is used to: 

  • Trigger an erection suitable for sexual intercourse 
  • Maintain firmness for the duration of the activity 


How Does Viridal Duo Work? 


Viridal Duo works by increasing blood flow to the penis. 

The active Ingredient — Alprostadil. This relaxes the blood vessels in your penis, allowing more blood to flow into your penis, making it easier for you to get an erection. 

The Erection Process 

When a man is turned on, that nerve data causes the blood vessels in the penis to get big and full of blood, allowing it to fill two parts called the corpora cavernosa. This leads to an increased blood flow that makes the penis hard and erect. 

For this process to work properly, the blood vessels must be healthy and unobstructed. Any damage or narrowing of the vessels can make it difficult to achieve or maintain an erection, which is where Viridal Duo helps restore normal function. 

How Long Does Viridal Duo Last? 

An erection typically occurs 10-15 minutes after you inject Viridal Duo. 

The duration of effects generally lasts for an hour, but also depends on how the patient responds to it. 

For instance, if you get an erection that lasts more than 4 hours (a condition known as priapism), head to the hospital right away. 

Is Viridal Duo Right for Me? 

Who can use Viridal Duo? Viridal Duo is suitable for adult men aged 18 and over who suffer from erectile dysfunction (ED), where you cannot use or have not had success with oral ED tablets such as Viagra (Sildenafil) or Cialis (Tadalafil). 

If you’re completely new to treating ED, oral options are a good place to start — try first-line treatments like Viagra (Sildenafil), Cialis (Tadalafil). 

Men who are unable to take tablets may find other options, such as Vitaros cream (Alprostadil) or the non-prescription treatment Eroxon StimGel, more helpful. 

Let your pharmacist know if you're taking any other medicines or if you have any other health conditions before using Viridal Duo, as it can interfere with other treatments. 

Why Choose Viridal Duo? 

  • Fast-acting: Works within 10–15 minutes of use. 
  • Reliable: Provides a firm, natural-feeling erection when you’re sexually aroused
  • Flexible dosage: Available in multiple strengths — 10mcg, 20mcg, and 40mcg. 
  • Alternative option: Perfect for men who can’t take or don’t respond to oral ED tablets. 
  • Pharmacists-approved: Supplied only with professional medical guidance and prescription. 


Viridal Duo gives men greater control over their ED treatment and can help restore confidence, spontaneity, and satisfaction in their sexual relationships. 

How to Use Viridal Duo (Alprostadil) (10mcg, 20mcg, 40mcg) 

This can be administered into the shaft of the penis, usually 10 to 15 minutes before having sex with a partner. This medication does not require sexual stimulation to work, as do the oral ED drugs. 

The average man will require between 10 and 20 micrograms per injection. To use the product, you should always take it as prescribed by your pharmacist. 

Don't inject more than 40 micrograms at once. 

Before your treatment begins, your pharmacist will teach you the correct way of injecting using the Viridal Duo Starter Pack. You may only want to use it at home, where you’re comfortable with the process. 

You must not take a dose of Viridal Duo more than once every 24 hours or use it more than 2–3 times each week. Using too much can raise your risk of serious side effects. 

Your GP will assess how well it's working for you every 3 months. 

What You’ll Need 

Each Viridal Duo pack includes the essentials for administration: 

  • Easy-Duo Injector 
  • Viridal cartridge (contains Alprostadil and saline solution) 
  • Injection needle 

 

Step-by-Step: How to Inject Viridal Duo 

Prepare the needle 

  • Check the needle’s seal to ensure it’s intact. 
  • Remove the protective cover and attach the needle securely to the injector. 

Prepare the cartridge 

  • Unscrew the plunger from the injector. 
  • Clean the cartridge tip using an alcohol swab. 
  • Insert the Viridal cartridge and screw the plunger back on. 

Mix the solution 

  • Hold the injector upright (needle pointing upward). 
  • Push the plunger gently until the grey stoppers meet, dissolving the powder into the liquid. 
  • Shake lightly until the solution becomes completely clear. 

Remove air bubbles 

  • Take off both needle caps. 
  • Tap the injector to bring air bubbles to the top, then press the plunger slightly until a small drop appears at the needle tip. 

Set your dose 

  • Move the plunger carefully to your prescribed dose mark. 

Prepare the injection site 

  • Clean the side of the penis (avoid visible veins) with an alcohol swab. 
  • Let the area air-dry completely before injecting. 
  • Double-check that your dose and solution are correct. 

Inject the solution 

  • Hold the injector level and insert the needle straight into the penis shaft (not angled). 
  • Slowly inject the solution over 5–10 seconds. 

After injection 

  • Remove the needle carefully. 
  • If any bleeding occurs, gently press the area with sterile gauze. 

Wait for the erection 

  • You should expect an erection to develop within 5–15 minutes. 
  • The effect usually lasts up to one hour. 

For full, detailed instructions, always refer to the Patient Information Leaflet included in your Viridal Duo pack. 

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Side Effects of Viridal Duo (Alprostadil) 

Like all medicines, Viridal Duo can cause side effects, although not everyone will experience them. Most side effects are mild and temporary, but some may require medical attention. 

Common Side Effects (may affect up to 1 in 10 men): 

  • Mild pain at the injection site — This is the most common effect and usually improves as you get used to the treatment. 
  • Swelling, redness, or slight bruising where the injection was given. 
  • Warmth or aching in the penis, typically mild and short-lived. 
  • Prolonged erection (lasting more than 1 hour). If this happens often, contact your pharmacist— your dose may need adjusting. 

Uncommon Side Effects (may affect up to 1 in 100 men): 

  • Dizziness or light-headedness, particularly after injection, due to a drop in blood pressure. 
  • Mild bleeding or small blood spots under the skin at the injection site. 
  • Numbness or tingling sensations in the penis. 
  • Pain during sexual activity or a feeling of tightness in the penis. 

Rare but Serious Side Effects: 

Seek immediate medical attention if you experience any of the following: 

  • Erection lasting longer than 4 hours (priapism) – this is a medical emergency that requires urgent treatment. 
  • Severe pain, deformity, or bending of the penis during or after erection – this may be a sign of fibrosis (scar tissue). 
  • Severe dizziness or fainting, which could be linked to low blood pressure. 
  • Allergic reaction 

 

Viridal Duo Warnings and Precautions 

  • Do not combine Viridal Duo with any other erectile dysfunction medicines, muscle relaxants, or treatments for sexual performance. This combination can greatly increase the risk of a dangerously prolonged erection lasting more than four hours. 
  • Avoid driving or operating heavy machinery after using Viridal Duo. The medicine may cause a sudden drop in blood pressure, making you feel light-headed or faint. 
  • Always rotate your injection sites to avoid tissue damage or scarring. 
  • Speak with your pharmacist if you notice pain, nodules, or hard areas forming on your penis after regular use. 
  • Store your Viridal Duo properly and never share your injector or needles with anyone else. 

Frequently Asked Question

Viridal Duo contains an active ingredient called Alprostadil, which is a type of vasodilator – a medicine that opens up blood vessels for increased supply of blood. 

The drug comes in a two-chamber glass cartridge, which consists of Alprostadil in one chamber and a sodium chloride solution in the other. 

When these compartments are mixed, they form an injectable solution, which creates a ready-to-use injection that is intended for intracavernosal application.

Viridal Duo works by increasing blood flow to the penis. 

The active Ingredient — Alprostadil. This relaxes the blood vessels in your penis, allowing more blood to flow into your penis, making it easier for you to get an erection.

An erection typically occurs 10-15 minutes after you inject Viridal Duo. 

The duration of effects generally lasts for an hour, but also depends on how the patient responds to it. 

No — unlike oral tablets such as Viagra or Cialis, Viridal Duo does not require sexual stimulation to produce an erection.
You should not use Viridal Duo more than once in 24 hours or more than 2–3 times per week. Overuse can cause prolonged erections or other side effects.
Some men experience a mild sting or ache at the injection site, especially during the first few uses.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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What exactly is Viridal Duo used for?

Viridal Duo contains an active ingredient called Alprostadil, which is a type of vasodilator – a medicine that opens up blood vessels for increased supply of blood. 

The drug comes in a two-chamber glass cartridge, which consists of Alprostadil in one chamber and a sodium chloride solution in the other. 

When these compartments are mixed, they form an injectable solution, which creates a ready-to-use injection that is intended for intracavernosal application.

How does Viridal Duo actually work?

Viridal Duo works by increasing blood flow to the penis. 

The active Ingredient — Alprostadil. This relaxes the blood vessels in your penis, allowing more blood to flow into your penis, making it easier for you to get an erection.

How long does Viridal Duo take to work?

An erection typically occurs 10-15 minutes after you inject Viridal Duo. 

How Long Does Viridal Duo Last? 

The duration of effects generally lasts for an hour, but also depends on how the patient responds to it. 

Does Viridal Duo require sexual stimulation? No — unlike oral tablets such as Viagra or Cialis, Viridal Duo does not require sexual stimulation to produce an erection. How often can I use Viridal Duo You should not use Viridal Duo more than once in 24 hours or more than 2–3 times per week. Overuse can cause prolonged erections or other side effects. Is it painful to inject Viridal Duo? Some men experience a mild sting or ache at the injection site, especially during the first few uses.

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Active Ingredient Tirzepatide Semaglutide Liraglutide
Mechanism of Action GLP-1 and GIP receptor agonist GLP-1 receptor agonist GLP-1 receptor agonist
Administration Weekly injection Weekly injection Daily injection
Dosage Varies by patient, typically starting low Varies, typically starting at 0.25 mg Varies, starting at 0.6 mg
Effect on Appetite Significantly reduces appetite and cravings Reduces appetite and increases satiety Reduces appetite and increases satiety
Average Weight Loss Up to 20% body weight reduction Up to 15% body weight reduction Significant weight reduction
Side Effects Nausea, vomiting, diarrhoea, constipation Nausea, vomiting, diarrhoea, constipation Nausea, diarrhoea, constipation, hypoglycemia
Approval FDA-approved for weight loss FDA-approved for weight loss FDA-approved for weight loss
Suitable For Adults with BMI ≥30 or ≥27 with comorbidities Adults with BMI ≥30 or ≥27 with comorbidities Adults with BMI ≥30 or ≥27 with comorbidities