Viagra® and Cialis® are two of the most popular medications for treating erectile dysfunction (ED), a common disorder in men of all ages. These drugs belong to the same class, that of type 5 phosphodiesterase inhibitors (PDE5), which work by increasing blood flow to the penis during sexual stimulation. Although they share this basic mechanism, Viagra® and Cialis® have distinct characteristics that may influence your choice based on your needs. Viagra®, whose active ingredient is sildenafil, was the first drug on the market to treat ED. It is taken about 30 to 60 minutes before sexual activity, with an effect that lasts between 4 to 6 hours. It is particularly recommended for men who are looking for a short-term solution or who prefer to take medication on an as-needed basis. However, its relatively short duration of action may limit the spontaneity of sexual encounters. Cialis®, on the other hand, contains tadalafil, and is distinguished by its prolonged duration of action, which can reach up to 36 hours. This long-lasting effect has earned it the nickname 'the weekend pill'. Cialis® thus offers greater flexibility, as it allows men to plan their sexual activity over a longer period without having to precisely anticipate the timing of taking the medication. This makes it an attractive option for those seeking more spontaneity in their sex life. Moreover, Cialis® can be taken daily at low doses, which is convenient for men with frequent sexual activity. In summary, the choice between Viagra® and Cialis® depends on several factors, including the desired duration of action, the frequency of sexual activity, and personal preferences. Viagra® is suitable for short-term effects, while Cialis® is ideal for those looking for a prolonged or more flexible solution. In any case, it is advisable to consult a healthcare professional before choosing the treatment that is right for you.

Viagra® vs Cialis®? Which one to choose?

Dr. Sam Ward - Urologue et Andrologue

Medically reviewed by Dr. Sam Ward

Written by Anne-Sophie Laignel

Last updated 9/13/2024 - 6 min read

Viagra® and Cialis® are two of the most popular medications for treating erectile dysfunction (ED). They are often compared by men looking to improve their sexual performance or to solve erection problems. Although they have similar effects, there are significant differences that may influence your choice depending on your personal needs. If you have erectile dysfunction or erection problems, Kano doctors are the best alternative for a safe and concrete opinion: with one click you access a professional authorized to prescribe treatments like Viagra® and Cialis®.

In this article, we will explore the main differences between Viagra® and Cialis®, and give you advice on the best choice for you. You will also have the opportunity to consult specialists through our platform Kano.care to obtain personalized prescriptions and suitable medical advice. Additionally, we will discuss the precautions to take when using these medications to ensure your safety.

What is Viagra®?

Viagra® is undoubtedly the most well-known medication for treating erectile dysfunction. Its active ingredient, sildenafil, works by relaxing the blood vessels in the penis, which allows for improved blood flow and facilitates an erection when there is sexual stimulation. Viagra® should be taken about 30 minutes to 1 hour before sexual activity and its effect usually lasts between 4 to 6 hours.

What is Cialis®?

Cialis®, on the other hand, contains tadalafil, another type 5 phosphodiesterase (PDE5) inhibitor similar to sildenafil, but with a much longer duration of action. Cialis® can be taken 30 minutes before sexual activity, and its effects can last up to 36 hours, earning it the nickname 'the weekend pill.'

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The main differences between Viagra® and Cialis®

1. Duration of action

One of the major differences between Viagra® and Cialis® is the duration of action. Viagra® remains active for about 4 to 6 hours, while Cialis® can stay in the system for up to 36 hours. This means that Cialis® offers more flexibility for those who wish to have sexual intercourse without having to precisely plan when to take the medication.

2. Time before effect

Viagra® starts to work about 30 minutes to 1 hour after taking it, while Cialis® can also start working in 30 minutes. However, some people find that Cialis® works a bit faster, although this difference is minimal.

3. Usage Frequency

Viagra® is often taken "as needed", meaning you only take it before having sexual intercourse. On the other hand, Cialis® can be taken daily at a low dose to allow an erection at any time, or "as needed", with a higher dose if necessary.

4. Side effects

Both medications can cause similar side effects, including headaches, hot flashes, stomach aches, and nasal congestion. However, some studies show that Cialis® may have a slightly lesser impact on vision, which is a potential side effect of Viagra®.

Consult an online specialist at Kano.care to get a medical evaluation before taking any of these medications. A personalized diagnosis is essential to determine the most suitable treatment for your situation.

What is the better choice between Viagra® and Cialis®?

The choice between Viagra® and Cialis® largely depends on your preferences and lifestyle. Here are some points to consider to help you choose:

  • Duration of the effect: If you prefer a wider window for sexual activity without having to precisely calculate when to take the medication, Cialis®, with its 36 hours of effectiveness, might be the best choice. For those who prefer a shorter effect, Viagra® may suffice.
  • Daily or occasional use: If you are considering having more spontaneous sexual intercourse, or if you prefer not to take medication every time you engage in sexual activity, low-dose daily Cialis® may provide a convenient solution.
  • Side effects: Although both drugs share similar side effects, it is crucial to monitor how your body reacts. If you experience bothersome side effects with one, the other might be a better option.

Safety measures when taking Viagra® or Cialis®

Before taking Viagra® or Cialis®, it is crucial to consult a healthcare professional, as these medications are not suitable for everyone. Medical conditions such as heart problems, high blood pressure, or a history of stroke may contraindicate the use of these medications. It is also advised not to take them with nitrates, as this could lead to a dangerous drop in blood pressure.

It is important to remember that Kano.care offers online medical consultations, where you can speak with a specialist confidentially and get prescriptions tailored to your health condition.

Be careful with online purchases

It is also crucial to be careful when purchasing these medications online. Many unregulated online pharmacies offer counterfeit drugs that can not only be ineffective but also dangerous to your health. It is therefore important to thoroughly check the authenticity of your medications.

Cost Comparison

The price of Viagra® and Cialis® can vary depending on the dosages and brands (generic or branded). Cialis® tends to be more expensive than Viagra® due to its longer duration of action. However, with the arrival of generics on the market, the cost of these medications has significantly decreased.

What is the best?

In summary, both Viagra® and Cialis® are effective options for treating erectile dysfunction. Viagra® is perfect for men who want a quick and short-term solution, while Cialis® is better suited for those looking for a long-term solution with more flexibility. The best way to find out which one is best for you is to consult a specialized doctor, whom you can easily contact via Kano.care.

Do not forget: these medications can provide remarkable results, but their use must be supervised by a health professional to ensure safe and effective use. For any questions or prescriptions, make an appointment with a specialist at Kano.care, the online solution for discreet and secure consultations.

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Dr. Sam Ward - Urologue et Andrologue

Révision médicale par le Dr. Sam Ward

Directeur médical, Urologue et Andrologue

Le Docteur Sam Ward, urologue et andrologue, dirige le service d'urologie à la Clinique Saint-Jean de Bruxelles depuis octobre 2024. Membre du Comité exécutif de la Chaire UNESCO Santé sexuelle & Droits humains et cofondateur de Kano.care, il est spécialise en santé masculine et médecine sexuelle.

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Reviewed on 6/6/2025

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Kano.care offers an innovative test to analyze the quality of your erections and detect potential disorders.

Take the only effective test now to find out if you have an erectile dysfunction problem?

When it comes to male intimate health, many men hesitate to consult a professional, often due to fear of judgment or embarrassment. However, identifying an erectile dysfunction issue can be the first step towards an effective solution. That's why the medical team at Kano.care has developed a unique test, based on objective criteria, to help you determine if you are facing an erectile dysfunction (ED) problem. This test, designed by experts in urology and andrology, replicates the essential questions of a medical consultation while offering a discreet and accessible experience.

A self-assessment of your erections can reveal a problem that needs to be addressed.

How can I tell if I have an erection problem?

Evaluating your erectile problems starts with observing the regularity and quality of your erections, including morning ones. A persistent decrease may indicate a disorder that requires attention. Thanks to an online medical consultation on kano.care, a specialized doctor can assess your symptoms and determine if a treatment, such as Viagra, Levitra, or Cialis, is suitable. These medications promote better blood circulation to improve your erections. If generic treatments are more suitable, they will also be offered to you. Do not let this problem affect your life: effective solutions are available.

Erectile dysfunction affects many men and can impair their quality of life. Whether it is occasional or persistent, this disorder can be caused by physical problems, psychological issues, or lifestyle habits. Natural solutions include improving lifestyle hygiene, performing pelvic floor exercises, and using herbs like ginseng. If necessary, medications such as Viagra can be prescribed. It is essential to consult a professional, as erectile dysfunction can indicate serious health problems, including cardiovascular issues. With appropriate care, it is possible to regain a fulfilling intimate life.

Erectile dysfunction: understanding and taking effective action!

Erectile dysfunction, or erection problems, affects many men and can impact their confidence and relationships. Its causes can be physical (cardiovascular problems, diabetes), psychological (stress, anxiety), or related to lifestyle (smoking, alcohol). To improve erections, natural solutions are available, such as better lifestyle habits, herbs like ginseng, or stress management. If these approaches are not enough, effective medical treatments, such as Sildenafil, are available by prescription. A consultation is essential, as persistent issues may indicate underlying health problems.

Erectile dysfunction a major health issue

Erectile dysfunction affects nearly 52% of men between the ages of 40 to 70.

Erectile dysfunction (ED) affects millions of men worldwide, with over 52% of men aged 40 to 70 experiencing it. Far more than just a health issue, ED has a profound impact on quality of life, leading to anxiety, depression, and relationship problems. This disorder is also an early indicator of cardiovascular diseases and diabetes. The economic costs associated with treatments and reduced productivity are significant, exceeding 4 billion dollars annually. It is crucial to raise more awareness about ED to mitigate its personal and societal effects.

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Treatments for erectile dysfunction, such as Viagra®, Cialis®, Levitra®, and Spedra®, carry potential risks that vary depending on the patient's health condition. They may cause serious side effects, including cardiovascular issues, dangerous drug interactions, or prolonged erections (priapism), which require immediate medical attention. It is essential never to take these medications without the advice of a qualified healthcare professional. A thorough medical consultation is necessary to determine the appropriate treatment for each individual, taking into account medical history and contraindications. Additionally, it is crucial to ensure that the medications are obtained from reliable and authorized sources. Medications purchased outside legal channels or without a prescription may be counterfeit, ineffective, or even harmful to health. Always consult a doctor before using these treatments and obtain medications from a licensed pharmacy.

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