Why is Sildenafil better than Avanafil?

Erectile dysfunction (ED) is a delicate but very common problem that affects millions of men around the world. It goes beyond the physical aspect, affecting psychological state, self-esteem and quality of relationships. Fortunately, modern medicine offers effective solutions, among which a special place is occupied by drugs of the phosphodiesterase-5 (PDE-5) inhibitor group. Sildenafil and Avanafil are two prominent representatives of this group, which are used to treat erectile dysfunction. Both drugs have proven their effectiveness and safety, but have some differences that can be decisive when choosing the best option for a particular man.

In this article, we will conduct an in-depth comparison of Sildenafil and Avanafil, focusing on the aspects in which Sildenafil may be a better choice. We will examine in detail their mechanisms of action, effectiveness, speed of onset of effect, duration of action, range of possible side effects, contraindications, features of use and pricing policy. Our goal is to provide you with comprehensive and unbiased information that will help you understand how exactly Sildenafil may be better than Avanafil in certain situations, and make an informed choice in favor of your health and sex life.

Erectile Dysfunction: A Modern Challenge

Erectile dysfunction, often referred to as impotence, is defined as the persistent inability to achieve or maintain an erection sufficient for satisfactory sexual intercourse. It is not just a temporary setback, but a long-term condition that can have a profound impact on the quality of life of a man and his partner. Understanding the causes of ED is the first step to effective treatment. Factors that can cause erectile dysfunction are varied and may include:

It is important to realize that erectile dysfunction is not a death sentence, but a condition that can be treated. Modern methods of therapy, including medication, psychotherapy, and lifestyle changes, can help most men restore a full sexual life. The first step in solving the problem is to see a doctor to establish a diagnosis and develop an individual treatment plan.

PDE5 Inhibitors: The Key to Restoring Erection

Phosphodiesterase-5 (PDE5) inhibitors have revolutionized the treatment of erectile dysfunction. These drugs work by blocking the PDE5 enzyme, which plays a key role in regulating blood flow in the penis. Understanding how they work helps to assess their effectiveness and possible differences between individual members of this group, such as Sildenafil and Avanafil.

During sexual arousal, nitric oxide (NO) is released in the male body. NO activates the enzyme guanylate cyclase, which in turn promotes the formation of cyclic guanosine monophosphate (cGMP). cGMP is the key molecule that causes the smooth cavernous muscles of the penis to relax. This relaxation allows blood to flow freely into the penis, filling the cavernous bodies and causing an erection.

The enzyme PDE5 is responsible for breaking down cGMP. When PDE5 is active, it breaks down cGMP, which leads to a decrease in its concentration in the cavernous bodies. This, in turn, causes smooth muscle contraction, decreased blood flow, and loss of erection.

PDE5 inhibitors, such as Sildenafil and Avanafil, block the action of the PDE5 enzyme. As a result, the breakdown of cGMP slows down, and its level in the cavernous bodies increases. This enhances and prolongs the relaxation of smooth muscles and blood flow to the penis in response to sexual stimulation, providing a strong and high-quality erection.

It is important to note that PDE-5 inhibitors are not aphrodisiacs and do not cause an erection on their own. Sexual stimulation is necessary for them to work. The drugs only enhance the natural physiological processes that occur in a man’s body during sexual arousal, making the erection stronger, more reliable and longer lasting. This allows men suffering from erectile dysfunction to achieve and maintain an erection sufficient for successful intercourse and return to a full sexual life.

Sildenafil: A Pioneer in the Fight Against Erectile Dysfunction

Sildenafil, known under the brand name Viagra, is the first and most famous drug of the PDE5 inhibitor group to be approved for the treatment of erectile dysfunction. Its history begins with Pfizer, where it was developed as a means of treating cardiovascular diseases, in particular, angina. However, during clinical trials, its pronounced side effect was discovered – the effect on erection. This unexpected discovery opened up a completely new perspective in the treatment of erectile dysfunction and made Sildenafil a revolutionary drug.

Since its introduction, Sildenafil has quickly gained worldwide fame and become a symbol of hope for millions of men suffering from ED. Its effectiveness and relative safety have been confirmed by numerous clinical studies and many years of experience. Sildenafil remains one of the most frequently prescribed drugs for the treatment of erectile dysfunction today.

Key features of Sildenafil:

Mechanism of action Sildenafil is a selective PDE-5 inhibitor. It selectively blocks the PDE-5 enzyme, increasing the level of cGMP in the cavernous bodies and promoting an erection in response to sexual stimulation.
Sildenafil usually starts to work within 30-60 minutes after taking it. The time of onset of action may vary depending on the individual characteristics of the body and the food in the stomach.
Duration of action The duration of action of Sildenafil is approximately 4-5 hours. During this time, the drug remains effective, allowing a man to achieve and maintain an erection with sexual stimulation.
Release form and dosage Sildenafil is available in the form of film-coated tablets in various dosages: 25 mg, 50 mg and 100 mg. The dosage is selected individually by the doctor depending on the severity of ED and the individual response of the patient. The most common starting dose is 50 mg, which can be adjusted depending on effectiveness and tolerability.
Directions for use Sildenafil is taken orally, usually 30-60 minutes before planned sexual activity. The drug should be taken with a sufficient amount of water. It is not recommended to take Sildenafil more than once a day.
Eating food , especially fatty foods, can slow down the absorption of Sildenafil and, accordingly, the onset of its action. For optimal effect, it is recommended to take Sildenafil on an empty stomach or 2-3 hours after eating.

Avanafil: A Modern PDE5 Inhibitor with Faster Action

Avanafil, sold under the brand name Stendra, is a relatively new drug in the PDE5 inhibitor class, designed to address some of the shortcomings of previous drugs, particularly the speed of action. It was created by Vivus Inc. and approved for erectile dysfunction after Sildenafil, but quickly gained popularity due to its unique characteristics.

Avanafil is positioned as a fast-acting drug that allows men to achieve an erection within 15-30 minutes of taking it. This feature makes it an attractive choice for those who value spontaneity in sexual relations.

Key features of Avanafil:

Mechanism of action: Avanafil, like Sildenafil, is a selective PDE5 inhibitor. It also blocks the PDE5 enzyme, increasing cGMP levels and promoting erection. However, Avanafil has a different molecular structure than Sildenafil, which causes some differences in their pharmacokinetic properties.
Onset of Action Avanafil differs from Sildenafil in its faster onset of action. Usually, the effect occurs within 15-30 minutes after taking it, and in some cases even earlier. This makes Avanafil one of the fastest-acting drugs for treating ED.
Duration of Action: Avanafil’s duration of action is somewhat shorter than that of Sildenafil, lasting approximately 4-5 hours. Although the duration of action is similar, Avanafil’s faster onset of action may provide a more flexible window of opportunity for sexual activity.
Release form and dosage: Avanafil is available as film-coated tablets in dosages of 50 mg, 100 mg and 200 mg. The starting dose is usually 100 mg, but can be adjusted by the doctor depending on the effectiveness and tolerability. For some men, a dose of 50 mg may be sufficient, while others may require a dose of 200 mg.
Avanafil is taken orally, 15-30 minutes before planned sexual activity. The drug should be washed down with water. It is not recommended to take Avanafil more than once a day.
Effect of food: Unlike Sildenafil, food intake, including fatty foods, has minimal effect on the absorption and onset of action of Avanafil. This is another advantage of Avanafil, which allows for greater flexibility in use.

Comparison of mechanisms of action: nuances of potency and selectivity

Although Sildenafil and Avanafil belong to the class of PDE5 inhibitors and act by a similar mechanism, there are certain differences in their molecular characteristics that affect their potency, selectivity, and pharmacokinetics. Understanding these aspects helps to better assess the potential advantages and disadvantages of each product.

PDE5 Inhibitory Potency: In laboratory studies, Avanafil has demonstrated higher selectivity for PDE5 compared to other PDE isoforms, including PDE6 (an enzyme found in the retina of the eye) and PDE1 (an enzyme found in the heart and blood vessels). Sildenafil is also selective for PDE5, but its selectivity for PDE6 is slightly higher than that of Avanafil. However, in terms of overall PDE5 inhibition potency, both drugs are effective. The key difference is speed of action rather than absolute potency.

Selectivity for other PDE isoforms: Avanafil’s higher selectivity for PDE5 and lower selectivity for other isoforms, particularly PDE6, may theoretically mean a lower risk of some side effects, such as visual disturbances. Sildenafil, with its slightly higher selectivity for PDE6, may be more likely to cause temporary visual disturbances, such as changes in color perception (primarily blue). However, the clinical significance of this difference in selectivity is a matter of debate, and in most clinical studies the side effect profiles of both drugs appear to be quite similar.

In general, both drugs demonstrate high selectivity for PDE5, which ensures their effectiveness in the treatment of erectile dysfunction. Differences in selectivity for other PDE isoforms may theoretically affect the spectrum of side effects, but clinically these differences are not always significant. The main difference between Sildenafil and Avanafil is their pharmacokinetics, in particular, the speed of onset of action, where Avanafil has a clear advantage.

Efficacy in the treatment of erectile dysfunction: comparison of results

Clinical studies confirm the effectiveness of both Sildenafil and Avanafil in the treatment of erectile dysfunction of varying severity and etiology. Both drugs are capable of significantly improving erectile function, increasing the number of successful sexual intercourses, and increasing patient satisfaction with treatment. However, it is important to consider the nuances of the effectiveness of each drug, in particular in different patient groups and in the context of various aspects of sexual function.

Comparative Efficacy Studies: Direct comparative studies of Sildenafil and Avanafil are limited, but the available data suggest that both drugs are effective in treating ED. In some studies, Avanafil has been shown to have a slightly faster onset of action, which may be an advantage for patients who value spontaneity. However, in terms of overall effectiveness, i.e., the ability to improve erections and ensure successful intercourse, the two drugs appear comparable.

Efficacy in different patient groups: Both drugs are effective in men with ED caused by various reasons, including diabetes, cardiovascular disease, prostatectomy, and psychogenic factors. There is no clear evidence that one drug is significantly more effective than the other in certain patient groups. The choice of drug often depends on the individual patient’s characteristics, preferences, and concomitant diseases.

Subjective patient assessment Some studies note that patients may subjectively prefer Avanafil due to its faster onset of action. This may create greater spontaneity and convenience in sexual relations. However, overall satisfaction with treatment is high for both drugs, and the choice often depends on individual priorities.

Thus, in terms of overall clinical efficacy in the treatment of erectile dysfunction, it is difficult to say unequivocally whether Sildenafil is better than Avanafil or vice versa. Both drugs are effective and can be successfully used to treat ED. The key difference is the speed of action, where Avanafil has a clear advantage, and perhaps in the spectrum of side effects, although clinically these differences are not always pronounced.

Speed of onset and duration of action: the key advantage of Avanafil

One of the most significant differences between Sildenafil and Avanafil is the speed of action. Avanafil is positioned as a fast-acting drug, allowing you to achieve an erection much faster than Sildenafil. This difference in speed of action can be an important factor when choosing a drug for the treatment of ED.

Speed of action:

Sildenafil The onset of action is usually observed within 30-60 minutes after administration. In some cases, it may take longer, especially when taking the drug after meals.
Avanafil The onset of action usually occurs within 15-30 minutes after administration, and in some cases the effects can be felt within 10-12 minutes. This makes Avanafil one of the fastest acting ED drugs on the market.

Avanafil’s faster onset of action is a significant advantage for men who value spontaneity in sexual relations. It reduces the waiting time between taking the drug and the start of sexual activity, making the process more natural and less planned. For some men, especially those who have irregular sexual contacts, Avanafil’s speed of action may be a decisive factor in choosing the drug.

Duration of action:

Sildenafil: The duration of action of Sildenafil is about 4-5 hours.
Avanafil: Avanafil also lasts for about 4-5 hours.

In terms of duration of action, both drugs are comparable. 4-5 hours is enough for most men to have successful intercourse. However, for some men who prefer a longer-acting drug, Sildenafil may be a better choice, as there are some subjective reports of a slightly longer duration of action for Sildenafil compared to Avanafil, although clinical data does not always support this.

Effects of food:

Sildenafil: Eating food, especially fatty foods, can significantly slow down the absorption and onset of action. For optimal results, it is recommended to take Sildenafil on an empty stomach or 2-3 hours after eating.
Avanfil: Food intake, including fatty foods, has minimal effect on the absorption and onset of action of Avanafil. This is another advantage of Avanafil, which allows for greater flexibility in use and less dependence on the timing of food intake.

So, if speed of action is a priority for you, Avanafil is an obvious choice due to its rapid action and lower food dependency. However, if duration of action is a more important factor, or if you prefer a drug with a longer history of use and a well-studied profile, Sildenafil may remain an attractive option.

Side effects: comparative analysis of safety profiles

Like any medication, Sildenafil and Avanafil can cause side effects. It is important to understand the possible side effects of each drug so that you can make informed choices and minimize risks. Overall, both drugs have a relatively safe profile, and most side effects are mild to moderate and temporary.

Common side effects for both drugs:

Headache: The most common side effect is related to the dilation of blood vessels in the brain. It is usually mild to moderate and resolves on its own.
Facial flushing (hot flashes) Also associated with vasodilation, causes a feeling of warmth and redness of the skin of the face and neck.
Nasal congestion: Caused by dilation of the blood vessels in the nasal mucosa, it can cause a feeling of congestion and difficulty breathing through the nose.
May include changes in color perception (mostly blue), increased sensitivity to light, blurred vision . Caused by the effect on PDE-6 in the retina. These side effects are usually temporary and go away after the drug stops working.
Gastrointestinal disorders: Nausea, dyspepsia, abdominal discomfort. Usually mild and temporary.

Differences in side effect profiles:

Side Effect Rates Some studies suggest that Avanafil may have a slightly lower side effect rate than Sildenafil. This may be due to its higher selectivity for PDE5 and lesser effect on other PDE isoforms. In particular, headaches and facial flushing may occur somewhat less frequently with Avanafil.
Visual disturbances: Although both drugs can cause visual disturbances, sildenafil, due to its slightly higher selectivity for PDE6, is more likely to cause changes in color vision (blueness of vision). Avanafil is generally less likely to cause these side effects. If maintaining clear vision and color vision is especially important to you, avanafil may be a better choice.
Cardiovascular effects: Both drugs may cause a mild decrease in blood pressure. However, no clinically significant differences in cardiovascular effects have been identified between Sildenafil and Avanafil. Patients with cardiovascular disease should exercise caution when taking either drug and consult a physician.

Overall, the side effect profile of Sildenafil and Avanafil is quite similar, and most side effects are mild and temporary. Avanafil may have a slightly lower incidence of side effects and is less likely to cause visual impairment, which may be an advantage for some men. However, individual tolerance of the drugs may vary, and the choice of drug should be made taking into account the individual characteristics of the patient and the doctor’s recommendations.

Contraindications and precautions: general risks and individual characteristics

Sildenafil and Avanafil have a similar profile of contraindications and precautions. Before taking either of these drugs, you should consult with your doctor and carefully read the instructions. Tell your doctor about any existing medical conditions, especially cardiovascular diseases, and about all the drugs you are taking to avoid unwanted interactions and minimize risks.

The main contraindications for both drugs are:

Concomitant use of nitrates Concomitant use of Sildenafil or Avanafil with nitrates (drugs used to treat angina) is strictly contraindicated, as this may lead to a sharp and dangerous decrease in blood pressure, which can be fatal.
Severe cardiovascular disease: Unstable angina, severe heart failure, recent myocardial infarction or stroke (within the last 6 months), uncontrolled hypertension or hypotension are contraindications for taking both drugs.
Severe liver and kidney impairment: Patients with severe liver and kidney impairment should avoid taking Sildenafil and Avanafil or use them with extreme caution and under close supervision.
Hereditary diseases of the retina: Retinitis pigmentosa is a contraindication for taking PDE-5 inhibitors, including Sildenafil and Avanafil.
Individual intolerance to the components of the drug: Allergic reactions to Sildenafil or Avanafil are a contraindication for their use.

Precautions and special instructions:

Cardiovascular disease: Patients with cardiovascular disease, even mild to moderate, should exercise caution when taking PDE5 inhibitors. A physician should evaluate the risks and benefits of treatment and select an appropriate dose. Sexual activity is not recommended for men with severe cardiovascular disease.
Priapism: A rare but serious side effect is a prolonged and painful erection (lasting more than 4 hours) that does not go away. If priapism occurs, seek immediate medical attention as it may cause permanent damage to the penis. Patients with a predisposition to priapism (eg, sickle cell anemia, multiple myeloma, leukemia) should be especially careful when taking PDE5 inhibitors.
Visual and Hearing Impairment If you experience sudden visual or hearing problems, such as sudden loss of vision in one eye or sudden hearing loss, stop taking the medicine immediately and consult a doctor.
Interaction with other drugs: Avoid taking Sildenafil or Avanafil with other drugs, as this may lead to unwanted interactions. It is especially important to avoid taking it with nitrates, alpha-blockers (drugs used to treat prostate enlargement and hypertension), antifungals (ketoconazole, itraconazole), antibiotics (erythromycin, clarithromycin), protease inhibitors. Tell your doctor about all the drugs you are taking, including prescription drugs, over-the-counter drugs, and herbal supplements.

Before starting to take Sildenafil or Avanafil, be sure to consult with your doctor to rule out contraindications, discuss possible risks and benefits of treatment, and receive individual recommendations on dosage and use.

Dosage and administration: individualization of treatment

The dosage of Sildenafil and Avanafil is selected individually by the doctor, taking into account the severity of erectile dysfunction, individual sensitivity to the drug, the presence of concomitant diseases, medications taken and other factors. Do not self-medicate, as the wrong dosage or use of the drug may be ineffective or dangerous.

Sildenafil: Typical Dosage Recommendations:

Starting Dose It is generally recommended to start with a dose of 50 mg. This dose is effective for most men with moderate ED.
Dose adjustment: Depending on the effectiveness and tolerability, the dose may be increased to 100 mg or decreased to 25 mg. The maximum daily dose is 100 mg. Dose increases should only be made under medical supervision.
Frequency of administration: Sildenafil should be taken no more than once a day, 30-60 minutes before planned sexual activity.
For optimal effect, it is recommended to take Sildenafil on an empty stomach or 2-3 hours after a meal . Eating food, especially fatty food, can slow down the absorption and action of the drug.

Avanafil: Typical Dosage Recommendations:

Starting Dose A starting dose of 100 mg is usually recommended. For some men, especially those new to PDE5 inhibitors or with mild ED, a starting dose of 50 mg may be sufficient.
Dose adjustment: Depending on the efficacy and tolerability, the dose may be increased to 200 mg or decreased to 50 mg. The maximum daily dose is 200 mg. Dose adjustments should be made under the supervision of a physician.
Frequency of administration: Avanafil should be taken no more than once a day, 15-30 minutes before planned sexual activity.
Features of use: Unlike Sildenafil, food intake has a minimal effect on the absorption and onset of action of Avanafil. This provides greater flexibility in the use of the drug.

For elderly patients, patients with impaired liver or kidney function, and when taking certain drugs at the same time, a dose adjustment of both Sildenafil and Avanafil may be required. The doctor will select the optimal dose and administration, taking into account the individual characteristics of each patient. It is important to follow the doctor’s recommendations and not exceed the recommended dose.

Cost and availability: the economic aspect of choice

Cost and availability of drugs is an important factor when choosing treatment, especially for long-term use. It is necessary to compare the price categories of Sildenafil and Avanafil and their availability in the pharmacy network.

Cost: Sildenafil is generally much more affordable than Avanafil. This is because Sildenafil is a generic drug, meaning its patent protection has expired, and there are many generic versions on the market from different manufacturers. Competition between generic manufacturers leads to lower prices. Avanafil, as a relatively new drug, does not yet have generic versions, which makes it more expensive. The cost may vary depending on the manufacturer, dosage, number of tablets in the package, and pharmacy chain, but overall Sildenafil remains a more cost-effective option.

Availability: Both drugs, Sildenafil and Avanafil, are widely available in pharmacies in Ukraine. A doctor’s prescription is required to purchase both drugs. Obtaining a prescription is usually not a problem, as erectile dysfunction is a common problem and doctors are well-versed in its treatment. Online pharmacies also offer the opportunity to purchase these drugs, but it is important to exercise caution and buy drugs only from licensed pharmacies to avoid counterfeits and low-quality products.

If cost is an important factor for you, Sildenafil may be a more attractive option due to its lower price and the wide availability of generic versions. Avanafil, being a newer drug, offers certain advantages, such as speed of action and less dependence on food, but these advantages may come with a higher price.

When Sildenafil May Be Better Than Avanafil? A Balanced Choice

To summarize the comparison of Sildenafil and Avanafil, it is important to emphasize that both drugs are effective and safe for the treatment of erectile dysfunction. The choice between them depends on the individual needs, priorities and capabilities of the patient, as well as on the doctor’s recommendations. There is no universal answer to the question of which drug is better, since each of them has its own advantages and disadvantages.

Sildenafil may be better than Avanafil in the following situations:

Cost-effectiveness: If cost of treatment is a factor, Sildenafil is a more affordable option due to its lower price and the availability of generic versions. This may be especially important for men who require long-term or regular treatment.
Time-tested effectiveness and safety: Sildenafil has been used to treat erectile dysfunction for over 20 years, and its effectiveness and safety are well-documented by numerous clinical studies and many years of experience. For some patients, especially those who prefer well-studied and proven drugs, this may be an important factor.
Sufficient duration of action: For most men, the duration of action of Sildenafil (4-5 hours) is sufficient for successful sexual intercourse. If speed of action is not a priority factor, then Sildenafil can provide sufficient effectiveness at a more affordable price.

Avanafil may be better than Sildenafil in the following situations:

Prioritize Speed of Action If speed of onset of effect is a key factor, Avanafil is an obvious choice due to its rapid onset of action (15-30 minutes). This allows for greater spontaneity and flexibility in sexual relations.
Minimal Food Effect: If you don’t want to restrict yourself from eating before taking the drug, Avanafil is a better option because its effectiveness is less affected by food intake, including fatty foods.
Potential for reduced side effects: For some men, Avanafil may be associated with a slightly lower incidence of side effects, particularly visual disturbances, although these differences are not always clinically significant.

The final choice of a drug for the treatment of erectile dysfunction should be individual and in collaboration with a doctor. The doctor will take into account your individual characteristics, health condition, priorities and financial capabilities to help you make an informed choice and achieve the best results in the treatment of erectile dysfunction. Do not postpone a visit to the doctor and do not self-medicate. Modern medicine offers effective solutions that will help you return the joy of a full sexual life.