Udenafil (Zudena)
$6.86
Zudena contains Udenafil and treats erectile dysfunction, offering a balance of fast onset and lasting effect.
Drug Information
5 reviews for Udenafil (Zudena)
Zudena contains Udenafil.
Udenafil is a medicine for men who have erectile dysfunction (ED), which means trouble getting or keeping an erection firm enough for sex. It belongs to the same family of medicines as sildenafil (Viagra) and tadalafil (Cialis).
Udenafil usually starts working in about 30 to 90 minutes and can help for up to about 12 hours. It is approved in some countries, such as South Korea, but it is not approved in the USA, UK or EU.
What is it used for?
- Erectile dysfunction in adult men
How does it work?
When a man is sexually excited, blood flows into the penis to make it hard. A natural chemical called PDE5 slowly stops this. Udenafil blocks PDE5, so blood flows in more easily and the erection lasts. You still need to be aroused for it to work.
This information is written in simple words to help you understand this product. It does not replace advice from your doctor or pharmacist.
Read these points before you start. If any of them apply to you, talk to your doctor or pharmacist first.
- Never take it if you use a nitrate medicine for chest pain (such as nitroglycerin/GTN spray or isosorbide) or recreational "poppers" (amyl nitrite). Together they can make your blood pressure drop to a dangerous level.
- Do not take it if you use riociguat, a medicine for high blood pressure in the lungs.
- Check with your doctor first if you have heart disease, have been told to avoid sex because of your heart, or had a heart attack or stroke in the last 6 months.
- Tell your doctor if you have very low or uncontrolled high blood pressure, or liver or kidney problems.
- Tell your doctor if you have an eye disease such as retinitis pigmentosa, or have ever suddenly lost sight in one eye.
- Tell your doctor if your penis has an unusual shape (for example Peyronie's disease) or you have a condition that can cause long erections, such as sickle cell anaemia, leukaemia or multiple myeloma.
- Tell your doctor if you have a bleeding problem or an active stomach ulcer.
- Some medicines can raise the amount of this medicine in your blood, such as ritonavir and other HIV medicines, ketoconazole, itraconazole, clarithromycin and erythromycin. Alpha-blockers (for example doxazosin or tamsulosin) can make your blood pressure drop more.
- Do not drink lots of alcohol or grapefruit juice with it. They can raise side effects like dizziness and low blood pressure.
- It does not protect against pregnancy or sexually transmitted infections.
- It is only for adult men aged 18 and over. It is not for women or children.
- Tell your doctor or pharmacist about every other medicine, vitamin or herbal product you use.
- Keep this product out of the reach and sight of children.
Like all medicines, Zudena can cause side effects, but not everybody gets them.
Common side effects
- Headache
- Flushing (your face feels warm and looks red)
- Stuffy or runny nose
- Indigestion or upset stomach
- Feeling dizzy
These are usually mild and often get better as your body gets used to it. Tell your doctor if they bother you or do not go away.
Stop using it and get medical help straight away if you notice:
- An erection that lasts longer than 4 hours (this can damage the penis if it is not treated quickly)
- Sudden loss or dimming of sight in one or both eyes
- Sudden loss of hearing, or ringing in the ears with dizziness
- Chest pain, fainting or an uneven heartbeat during or after sex
- Signs of an allergic reaction, such as swelling of the face, lips or tongue, a bad rash, or trouble breathing
This is not a complete list. If you notice anything unusual, ask your doctor or pharmacist.
- Take one tablet about 30 minutes to 1 hour before sex.
- Swallow it whole with a glass of water. You can take it with or without food.
- The usual dose is 100 mg. Your doctor may suggest 200 mg if needed.
- Never take more than one dose in 24 hours.
If you miss a dose: You only take this medicine when you need it, so you cannot really miss a dose. Never take two doses in one day.
If you use too much: Contact your doctor, a poison control centre or your local emergency number straight away, even if you feel fine. Take the pack with you.
How to store it: Keep it in its original pack at room temperature (below 25°C / 77°F), away from heat, damp and direct sunlight. Do not use it after the expiry date.
- QWill Zudena give me an erection without being turned on?
- A
No. It only helps your body respond when you are sexually excited. Without arousal, nothing will happen.
- QCan I drink alcohol with Zudena?
- A
A small drink is usually fine, but a lot of alcohol makes erections harder to get and raises the chance of dizziness and low blood pressure.
- QIs Zudena addictive?
- A
No. It is not habit-forming. You can stop using it at any time.
- QHow long does Zudena last?
- A
It can help for up to about 12 hours, which is longer than sildenafil but shorter than tadalafil.

Gabriel Parker –
Shipping was prompt and I got tracking updates along the way. It arrived sealed and in good shape. Communication was good throughout the order. Happy with the experience overall.
Jacob Durand –
Everything was in order when I opened the box. Browsing the site was pleasant and the search worked well. Simple, quick and reliable.
Andres Ward –
The parcel reached me without any delays. My Udenafil matched the description on the page. Their staff was patient with my questions. Very satisfied with how it all went.
Valentina Baker –
Quick review of my recent order. Customer service was polite and helpful. Good value for the money. Another good thing: everything was packed carefully and nothing was damaged. It was a pleasant experience and I am glad I chose this site.
Jia Traore –
I used this site for my latest order and had no problems. Pricing was reasonable and there were no hidden charges. On top of that, the parcel arrived a day or two sooner than I figured. Service was courteous from start to finish. Solid experience, nothing to complain about.