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Sildenafil Mylan

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

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Overview of Sildenafil Mylan

Property Description
Active ingredient Sildenafil
Form Film-coated tablet
Pharmacological class Phosphodiesterase type 5 (PDE5) inhibitor
Common use Improvement of impaired blood flow
Origin Synthetic chemical compound

The Identity and Class of Sildenafil Mylan

Sildenafil Mylan is a prescription medicine containing the single active ingredient, Sildenafil (INN: Sildenafil). This drug is a proprietary product manufactured by Mylan, now a Viatris company, which distinguishes it as a controlled-manufacture version of the generic Sildenafil molecule. Scientifically, Sildenafil is categorized within the specialized group of compounds known as Phosphodiesterase type 5 (PDE5) inhibitors, a classification that is broadly clinically recognized for its systemic vasoactive effects. The active compound is entirely a synthetic chemical compound, produced through chemical synthesis, which ensures consistent purity.

Composition, Form, and General Action

The medication is formulated as an oral preparation in the form of a film-coated tablet, making it convenient for systemic administration. It is a monocomponent product, containing only Sildenafil (often as Sildenafil citrate), along with pharmaceutical excipients necessary to create the final stable dosage form.

The core function of Sildenafil is related to its ability to act as a potent vasoactive agent. The fundamental mechanism involves the selective blockade of the PDE5 enzyme, which preserves levels of the chemical messenger cyclic guanosine monophosphate (cGMP). This increase in cGMP concentration promotes smooth muscle relaxation and induces vasodilation, or vessel widening. This established physiological action forms the basis of its general therapeutic application, serving to enhance impaired blood flow and improve specific circulatory function in targeted areas.

Regulatory References

  1. MedlinePlus Drug Information
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What side effects are possible with Sildenafil Mylan?

Possible Side Effects and Safety Information

Sildenafil Mylan's safety profile is defined by officially documented adverse reactions categorized by frequency and the physiological systems affected. Regulatory documents classify the most frequent adverse reaction as Headache, listed as Very Common. Other Common reactions include flushing, dyspepsia (indigestion), visual color distortions (e.g., cyanopsia), nasal congestion, and dizziness. These common effects primarily involve the vascular, nervous, and ocular systems.


Adverse reactions are further categorized into Uncommon and Rare tiers. Rare but serious adverse reactions are explicitly documented, including life-threatening cardiovascular events such as Myocardial infarction and Sudden cardiac death, as well as cerebrovascular events (stroke). The label also highlights the rare, sight-threatening condition Non-arteritic anterior ischaemic optic neuropathy (NAION) and the risk of Priapism (prolonged erection lasting more than four hours).


Specific safety restrictions and contraindications are formally defined in regulatory texts. Use is absolutely prohibited in patients taking any form of nitrates or nitric oxide donors due to the risk of severe hypotension. Contraindications also apply to individuals with severe pre-existing conditions, such as a recent history of myocardial infarction or stroke, pre-existing hypotension ( BP < 90/50 mmHg), or severe hepatic impairment. Caution is advised for patients predisposed to priapism (e.g., sickle cell disease). The profile notes that serious cardiovascular events have been reported to occur during or shortly after sexual activity, providing specific timing context.

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Overdose and Emergency Response

Overdose and when to seek help

Official regulatory information describes overdose manifestations and required emergency actions for Sildenafil. Acute overexposure may result in exaggerated known side effects documented in clinical trials at doses higher than the maximum recommended amount. These include severe headache, pronounced flushing, dizziness, dyspepsia, and abnormal visual changes such as cyanopsia.

When to seek immediate medical assistance

Specific severe symptoms mandate immediate attention as stated in the regulatory labels to prevent potentially irreversible damage:

  • Priapism: Seek immediate medical help if an erection persists for longer than 4 hours.
  • Sudden Vision Loss: Seek immediate medical care if a sudden loss of vision occurs in one or both eyes.
  • Sudden Hearing Loss: Seek prompt medical attention for any sudden decrease or loss of hearing.

Overdose Management and Monitoring

Official documents confirm that no specific antidote is known for Sildenafil overdose. Management is therefore based on symptomatic and supportive treatment. Due to the medication's vasoactive properties, close monitoring of blood pressure and overall cardiovascular status may be required. Sildenafil is highly protein bound, and procedures like haemodialysis are not expected to accelerate its clearance.

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Therapeutic Uses of Sildenafil Mylan

What Sildenafil Mylan Treats: Main Uses and Benefits

Sildenafil Mylan is generally used for managing symptoms associated with two distinct therapeutic areas: erectile dysfunction (ED) and Pulmonary Arterial Hypertension (PAH). The medication is applied across domains where additional symptomatic support is needed for conditions where symptoms linked to organ-specific functional stress create noticeable physiological strain. The medication helps address symptom clusters that may become intense or disruptive in these conditions.

Primary Therapeutic Benefits

For ED, Sildenafil Mylan supports the patient's ability to achieve an erection adequate for sexual activity, particularly in challenging clinical scenarios like ED associated with diabetes or following prostatectomy. For PAH, it is used to help manage symptoms associated with Pulmonary Arterial Hypertension (PAH), a condition marked by increased physiological stress, such as shortness of breath and fatigue. This supportive therapy assists with maintaining functional stability and supports physical endurance.

Quick Fact: Relief for Circulatory Symptoms The medication is applied to ease challenging symptoms in two areas: symptoms related to impaired genital blood flow and symptoms related to elevated pulmonary vascular resistance, providing supportive relief when these symptoms interfere with routine activities.

Regulatory References

  1. NIH MedlinePlus overview
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Eligibility and Restrictions for Use

Who can and cannot use Sildenafil Mylan?

Official regulatory documents define strict criteria for the use of Sildenafil Mylan, focusing on population eligibility and non-eligibility based on patient profile and existing conditions.

Contraindicated Populations

The medicine must not be used by patients who are concurrently taking any form of nitrates or the guanylate cyclase stimulator, riociguat. Use is also strictly contraindicated in patients with a history of Non-Arteritic Anterior Ischaemic Optic Neuropathy (NAION) resulting in vision loss, or those with certain severe cardiovascular disorders like recent stroke or myocardial infarction (within six months), unstable angina, or severe hypotension (resting blood pressure less than 90/50 mmHg). Severe hepatic impairment (Child-Pugh Class C) also prohibits use.


Age, Gender, and Conditional Use

Sildenafil Mylan (for Erectile Dysfunction) is only indicated for adult men aged 18 years and over; it is not indicated for use in women or pediatric patients. Use requires caution in older adult patients (ge 65 years) and those with severe renal impairment due to reduced clearance, often requiring consideration of a lower starting dose. Caution is also necessary for patients with conditions predisposing to priapism (e.g., sickle cell disease) or anatomical penile deformation.

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What should I know about interactions with other medicines?

Sildenafil Mylan Interactions with other medicines and products

Sildenafil Mylan's interaction profile is characterized by pharmacokinetic interference and pharmacodynamic potentiation, based on official regulatory documentation.


Contraindicated Combinations

Co-administration with organic nitrates (in any form) or nitric oxide donors is strictly contraindicated due to the severe and potentially fatal risk of symptomatic hypotension. The soluble guanylate cyclase (sGC) stimulator Riociguat is also a contraindicated combination.

Pharmacokinetic and Exposure Interactions

The primary metabolic clearance of Sildenafil is mediated by the Cytochrome P450 3A4 (CYP3A4) enzyme. Substances that affect this pathway alter Sildenafil exposure:

  • Potent CYP3A Inhibitors (e.g., Ritonavir, Ketoconazole) cause a substantial increase in Sildenafil plasma concentrations by reducing its metabolic clearance. This interaction necessitates an official dose restriction for Sildenafil (e.g., maximum dose of 25 mg within a 48-hour period when co-administered with Ritonavir).
  • CYP3A Inducers (e.g., Bosentan) decrease Sildenafil exposure and may reduce its plasma levels.

Pharmacodynamic and Other Interactions

  • Alpha-blockers (e.g., Tamsulosin) may lead to additive hypotensive effects; patients must be stable on alpha-blocker therapy before Sildenafil is initiated, and the initial dose must be restricted to 25 mg.
  • A high-fat meal officially slows the rate of absorption and reduces the maximum plasma concentration of Sildenafil.
  • The use of Sildenafil with Oral Vitamin K Antagonists has been associated with reports of increased epistaxis (nosebleeds) in specific patient populations.

This information reflects the constraints and requirements for administration as documented in official government prescribing information.

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Mechanism of Action

How Sildenafil Mylan Works: The Mechanism of Action


Selective Enzyme Inhibition and cGMP Preservation

Sildenafil Mylan works as a selective competitive inhibitor of the enzyme Phosphodiesterase type 5 (PDE5). This targeted molecular action prevents the breakdown of the cellular messenger cyclic Guanosine Monophosphate (cGMP), causing its accumulation within specific smooth muscle cells.


Potentiation of the Nitric Oxide Pathway

The drug's mechanism is dependent on the presence of the body's natural signal, Nitric Oxide (NO). Sildenafil potentiates the NO-cGMP pathway, modulating the duration and intensity of the naturally occurring signal for smooth muscle relaxation. This leads to the activation of intracellular cascades that reduce calcium levels, which is the physiological trigger for vasodilation (vessel widening).


Functional Consequence: Localized Vasodilation

The resulting physiological effect is a targeted vasodilation within specific vascular beds where PDE5 is abundant, which is the systemic consequence of the mechanism. The mechanism only amplifies an existing physiological response; the drug does not cause vasodilation directly if the initial NO signal is absent or significantly impaired.

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Dosage and Administration Information

Sildenafil is administered via different dosing regimens and routes based on the specific condition being managed.

Official Administration Guidelines

Usage Constraint Erectile Dysfunction (ED) Pulmonary Arterial Hypertension (PAH)
Route of Administration Oral (Film-coated tablets: 25 mg, 50 mg, 100 mg) Oral (Tablets/Suspension: 20 mg); Intravenous (IV) Bolus Injection
Standard Adult Dose Starting Dose: 50 mg. Maximum: 100 mg per single dose. Starting Oral Dose: 20 mg. Maximum: 80 mg three times daily.
Frequency and Timing As needed (intermittent use), maximum once per day. Taken 30 minutes to 4 hours prior to activity. Three times a day (TID), with doses administered 4 to 6 hours apart.
With or Without Food May be taken with or without food. Taking it with a high-fat meal may delay the time until it takes effect. May be taken with or without food.

Population-Specific Use

For the ED indication, a lower starting dose of 25 mg should be considered in older adults (aged 65 years and over), as well as in patients with severe renal impairment ( CrCl < 30 mL/min) or hepatic impairment. For PAH, a weight-based dosing schedule is specified for pediatric patients (ages 1 to 17), starting at 10 mg or 20 mg three times daily based on weight.

These instructions establish a clear, standardized protocol for use, defining the exact route, frequency, and maximum dose based on the specific approved condition.

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Recent Clinical Evidence

Research Evidence / Overview of Studies for Sildenafil Mylan


Evidence for use in Erectile Dysfunction (ED)

Sildenafil Mylan was studied for its use in Erectile Dysfunction (ED) through short-term (10- to 16-week) randomized controlled trials (RCTs). These studies primarily examined patient-reported experiences and outcomes reflecting daily functioning, such as the ability to achieve and maintain an erection, using standardized surveys. Findings describe patterns observed where participants receiving sildenafil reported measurements of change in scores compared to placebo groups. Research also explored how reported success rates for sexual attempts changed during the study period.


Evidence for use in Pulmonary Arterial Hypertension (PAH)

Research was studied for the use of sildenafil in Pulmonary Arterial Hypertension (PAH) through intermediate-term (12- to 16-week) placebo-controlled studies. Researchers monitored outcomes reflecting daily functioning and physiological strain, including the 6-minute walk distance ( 6MWD) and measurements of pressure within the arteries of the lungs. Studies report how these outcomes evolved, showing that data show patterns related to measured differences in 6MWD compared to placebo groups. Separate studies were observed in pediatric patients, though one long-term trial reported a safety signal that led to its termination, illustrating that results apply only to the populations studied.


Long-Term Studies and Follow-Up Data

Initial trials for both indications were followed by open-label extension studies that extended observation periods up to a year or more. These studies contribute to the broader evidence landscape by exploring the maintenance of reported patterns. However, because these studies lack a simultaneous control group, long-term effects are not fully established, and there is limited information for long-term outcomes regarding sustained observation patterns.


What is Still Uncertain About Sildenafil Mylan Research

Comparative evidence is lacking for many head-to-head comparisons against newer treatments. Follow-up durations were limited in many core efficacy studies, and data for certain groups remain insufficient. For instance, subgroup findings are uncertain in some cases for patients with severe symptoms or certain comorbidities. Research provides context but not individual predictions, underscoring that research is ongoing and questions about sustained outcomes remain.

Key Studies & References

  1. A Randomized, Double-Blind, Placebo-Controlled Study of Sildenafil in Children With Pulmonary Arterial Hypertension (STARTS-1/STARTS-2)
  2. Safety and tolerability considerations in the use of sildenafil for children with pulmonary arterial hypertension
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Frequently Asked Questions (FAQ)

Common questions about Sildenafil Mylan (FAQ)

Q: Is Sildenafil Mylan the exact same medicine as other generic Sildenafil tablets?

All generic versions of Sildenafil are required by regulatory agencies to meet strict bioequivalence standards. This means that Sildenafil Mylan must contain the exact same active ingredient and achieve the same concentration in the bloodstream as the original reference medicine. The active drug is identical to that in other approved generics.

Q: Is Sildenafil Mylan considered a controlled substance in major regulatory regions?

Official regulatory schedules classify Sildenafil as a prescription-only medicine. It is not listed as a scheduled or controlled drug in the major regulatory schedules used in regions like the United States, Canada, or the United Kingdom.

Q: How long are the effects of Sildenafil Mylan generally described as lasting?

The rate at which the active substance is removed from the body is described by its elimination half-life, which is typically reported to be 3 to 4 hours. This pharmacological measurement gives an indication of how long the medicine remains significantly present in the bloodstream.

Q: Are there common reasons why Sildenafil Mylan might not produce the desired effect the first time?

According to the official mechanism of action, the drug requires sexual stimulation to trigger its therapeutic effect; it does not cause an erection on its own. Official information also indicates that taking the medicine with a high-fat meal may delay the onset of action.

Q: Are there any known interactions between Sildenafil Mylan and moderate alcohol consumption?

The patient counseling information section notes that alcohol may increase the potential for certain side effects of Sildenafil. These increased effects include symptoms like dizziness or a reduction in blood pressure.

Q: What types of over-the-counter medicines or common supplements are known to interact with Sildenafil Mylan?

Regulatory documents explicitly mention that consuming grapefruit juice may lead to an unwanted increase in the level of sildenafil in the bloodstream. This is due to the drug's metabolism involving the CYP3A4 enzyme, which can be affected by certain other substances.

Q: Is there an interaction risk with consuming grapefruit or grapefruit juice while using Sildenafil Mylan?

Official prescribing information states that consuming grapefruit juice may increase Sildenafil plasma concentrations. This interaction may potentially elevate the presence of the drug in the body.

Q: Do regulatory documents mention any signs of dependence or tolerance with Sildenafil Mylan?

The regulatory documents include a section on drug abuse and dependence. Official information does not describe any signs of physical dependence or the development of tolerance (a diminished effect over time) associated with Sildenafil.

Q: How do official sources describe the time it takes for Sildenafil Mylan to reach peak concentration in the body?

The time required to reach the maximum concentration of the drug in the blood, known as peak plasma concentration, is typically described as being approximately one hour. This time frame can vary based on individual factors and conditions of use.

Q: Are there research studies focused on Sildenafil Mylan specifically, or mainly on the active ingredient Sildenafil?

Regulatory bodies primarily rely on the clinical studies conducted on the active molecule, Sildenafil, to assess effectiveness and safety. This evidence base is used regardless of the specific generic brand name.

Q: Does the use of Sildenafil Mylan affect fertility or sperm quality according to research?

Non-clinical (animal) studies are summarized in the regulatory documents regarding reproductive effects. Based on this, non-clinical studies summarized in regulatory documents suggest that the drug is not anticipated to significantly affect fertility in humans, though comprehensive clinical information on this topic is limited.

Q: Is there an established link between Sildenafil Mylan use and hearing loss?

Regulatory documentation notes that reports of sudden decrease or loss of hearing have been documented in post-marketing experience (reports received after the drug was approved). This is listed as a rare, reported adverse reaction.

Q: Is the onset of action of Sildenafil Mylan the same for every user?

Official documents note that the rate of absorption and onset of action can be affected by various factors. These include the consumption of food, which may delay its effect, and other individual patient characteristics.

Q: Are there any official warnings about long-term or chronic side effects of Sildenafil Mylan?

While clinical trials were conducted for short-term efficacy, the regulatory text indicates that follow-up periods were limited. Therefore, official information states that long-term effects and outcomes are not fully established.

Q: Are there any specific signs that indicate a side effect may be serious?

The label documents rare but serious adverse reactions, which include priapism (an erection lasting longer than four hours), sudden vision changes, and serious cardiovascular events. These documented events indicate the potential for serious outcomes.

Q: Can Sildenafil Mylan be used by people who take medication for high blood pressure?

Regulatory documents state that co-administration with alpha-blockers, a class of blood pressure medicine, may lead to additive hypotensive effects (further lowering blood pressure). For this specific interaction, the official guidance requires caution and a restricted starting dose when the combination is initiated.

Q: How is Sildenafil Mylan similar to or different in its general action compared to Tadalafil?

Sildenafil belongs to the pharmacological class known as Phosphodiesterase type 5 (PDE5) inhibitors. Tadalafil and other similar medicines are in the same class and share the core mechanism of preserving cGMP to promote smooth muscle relaxation.

Q: Does the manufacturer's description indicate any difference in formulation from other Sildenafil generics?

As a generic product, Sildenafil Mylan is required by regulatory agencies to be bioequivalent to the original reference medicine. This ensures it contains the same active ingredient and delivers it to the body in the same way, regardless of minor differences in inactive ingredients.

Q: What is the current scientific consensus on the overall effectiveness of Sildenafil for its indicated uses?

Research findings described in regulatory documents report that participants receiving the drug demonstrated measurements of change in outcomes reflecting daily functioning compared to placebo groups. This evidence forms the basis of its approved use.

Q: Is there concern that Sildenafil Mylan may lose effectiveness over a period of time?

Regulatory documents include analysis regarding the risk of drug dependence and tolerance. Official information does not describe signs of tolerance (diminished effect) development associated with Sildenafil.

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How should Sildenafil Mylan be stored and disposed of?

How to Store and Dispose of Sildenafil Mylan Tablets

The storage and disposal of Sildenafil Mylan must adhere strictly to official regulatory guidelines to maintain product quality and safety.


Storage Requirements

Sildenafil tablets must be stored at Controlled Room Temperature, typically 20 C to 25 C (68 F to 77 F), with permitted temperature excursions. The medicine must be kept out of the sight and reach of children at all times. To protect stability, it is required to keep the tablets away from moisture and light and store them in the original container. The product must not be used past the expiry date printed on the carton.


Disposal Instructions

Official regulations require that Sildenafil Mylan should not be disposed of via wastewater or household waste. To ensure environmentally appropriate disposal, patients must ask a pharmacist how to properly discard unused or expired medicine.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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