Pawar

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Pawar

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.

Overview of Pawar

Pawar is a prescription-only medicinal entity whose fundamental identity is rooted in its single active substance, Tadalafil (INN). It is a synthetic Small Molecule drug classified as a Phosphodiesterase type 5 (PDE5) Inhibitor. This classification means it is specifically engineered to target an enzyme involved in regulating smooth muscle relaxation and blood flow, a mechanism clinically recognized for its therapeutic effects on vascular function. Pawar is a brand of Tadalafil, a compound with the chemical formula C22H19N3O4.


Quick Facts

Property Description
Active ingredient Tadalafil (INN)
Form Tablet
Pharmacological class PDE5 Inhibitor
General purpose Promotes smooth muscle relaxation and vasodilation
Origin Synthetic Small Molecule

Defining its Core Entity and Differentiation

As a PDE5 inhibitor, the core action of Tadalafil is to block the PDE5 enzyme, which preserves a natural messenger molecule that relaxes muscle cells in blood vessel walls. This targeted effect results in vasodilation (widening of blood vessels). The general therapeutic purpose of this drug is clinically recognized for conditions requiring improved circulatory function in specific organs, supported by extensive pharmacological studies.

A key distinguishing feature of Tadalafil, which sets it apart from other drugs in the same class, is its prolonged half-life. This property means the drug remains active in the body for a sustained period; the mean terminal half-life is approximately 17.5 hours in healthy subjects. This pharmacokinetic profile provides a longer therapeutic window, allowing for sustained management of conditions requiring assistance with circulation and muscle tone.


Composition and Form

Pawar is a single-ingredient product supplied in the solid dosage form of a tablet intended for oral administration. The composition involves the active substance, Tadalafil, combined with solid pharmaceutical excipients to facilitate stable, systemic delivery.

Regulatory References

  1. Tadalafil - StatPearls - NCBI Bookshelf

What side effects are possible with Pawar?

Possible Side Effects and Safety Information

The official safety profile of Pawar, containing the active substance Tadalafil, is structured around frequency categories and specific organ systems, as documented by regulatory agencies. This framework defines the risks associated with its use, particularly those resulting from its vasodilatory effects.

Frequency-Classified Adverse Reactions

Adverse reactions are organized based on the expected likelihood of occurrence derived from clinical trials and post-marketing data:

  • Very Common (ge 10%): The most frequently reported reaction is headache.
  • Common (ge 1% and < 10%): Includes dyspepsia (indigestion), back pain, myalgia (muscle pain), nasal congestion, flushing, and pain in limb. These reactions often appear more frequently at the start of treatment and may subside with continued use.

Serious Adverse Reactions and Safety Constraints

Regulatory documentation highlights certain rare but clinically important events. Serious adverse reactions documented include Priapism (a prolonged erection lasting four hours or longer), sudden loss of vision (sometimes linked to Non-arteritic Anterior Ischemic Optic Neuropathy, or NAION), sudden decrease or loss of hearing, and serious cardiovascular events.

Crucial safety constraints are placed on its use. Pawar is strictly contraindicated for use with any form of organic nitrate (e.g., nitroglycerin) or guanylate cyclase stimulators (e.g., riociguat) due to the potential for a severe, life-threatening drop in blood pressure.

Population-Specific Safety Notes

Specific limitations exist for individuals with compromised organ function. Use is generally not recommended in patients with severe renal impairment or severe hepatic impairment (Child-Pugh Class C) due to the risk of increased systemic exposure to Tadalafil.

Overdose and Emergency Response

Overdose and when to seek help — Official Regulatory Information for Pawar

The official regulatory profile for Pawar (Tadalafil) overdose describes documented manifestations and mandated emergency actions based on excessive exposure.

Feature Regulatory Documentation Statement
Documented overdose presentations Overdose symptoms represent an exaggeration of adverse events seen at therapeutic doses, including severe Headache, Flushing, Myalgia, Back pain, Dyspepsia, Nasal congestion, and Pain in limb.
Physiological systems affected Severe effects documented in the official label relate primarily to the Urogenital system (Priapism), Sensory system (Sudden decrease or loss of vision/hearing), and Cardiovascular system (potential for severe hypotension).
Population-specific overdose notes Patients with Severe Renal Impairment or Severe Hepatic Impairment are at risk of increased Tadalafil exposure (AUC), indicating an elevated risk for dose-related adverse outcomes.
When immediate medical help is required Seek emergency medical assistance immediately if an erection persists for 4 hours or longer. Stop treatment and seek prompt medical attention in the event of sudden loss of vision or sudden decrease or loss of hearing.

Overdose classifications (high-level)

Classification Aspect Regulatory Documentation Statement
Severity classification Symptoms range from exaggerated common effects to time-critical, potentially irreversible outcomes (e.g., Priapism, NAION) requiring immediate intervention.
Overdose-context constraints No specific antidote is known or documented. Management is limited to symptomatic and supportive measures, as Hemodialysis contributes negligibly to tadalafil elimination.

Connection to the overall overdose profile (2–4 sentences): The regulatory documents strictly define the Tadalafil overdose profile by listing the exaggerated clinical manifestations and establishing explicit, time-critical triggers that mandate seeking emergency medical help. The official guidance emphasizes symptomatic and supportive management while formally noting the ineffectiveness of hemodialysis and identifying patient populations (renal/hepatic impairment) with a documented risk of increased drug exposure due to altered clearance.

Therapeutic Uses of Pawar

What Pawar Treats: Main Uses and Benefits

Pawar is generally used in situations involving certain distressing symptoms across several therapeutic domains. The medication is relevant for easing symptoms associated with Erectile Dysfunction (ED), Benign Prostatic Hyperplasia (BPH), and Pulmonary Arterial Hypertension (PAH).

For men, the medication assists with symptomatic management of erectile challenges, supporting the ability to achieve and maintain penile rigidity, and may assist with maintaining a sense of stability over an extended period. For BPH, it helps address symptom clusters that include frequent nighttime waking and a weak urinary stream, which helps improve day-to-day comfort and supports general well-being during symptomatic periods. In the context of PAH, this supportive relief is applied across domains where additional symptomatic support is needed to ease symptoms related to reduced exercise capacity and shortness of breath.

“Symptomatic support plays a role in managing the overall burden of symptoms across these distinct areas of functional strain.”


Quick Fact

Property Description
Quick Fact: Support for BPH Symptoms Supports relief from urinary symptoms that interfere with daily comfort, such as the frequent, urgent need to urinate.
Quick Fact: Support for Erectile Function Assists with maintaining a sense of stability over an extended period, supporting flexibility in sexual activity.
Quick Fact: Management of PAH Symptoms May assist with maintaining functional stability by easing the impact of reduced physical endurance.

Regulatory References

  1. NIH MedlinePlus overview of Tadalafil

Eligibility and Restrictions for Use

Pawar (Tadalafil) is indicated primarily for use in adult men for the treatment of Erectile Dysfunction (ED) and Benign Prostatic Hyperplasia (BPH). For Pulmonary Arterial Hypertension (PAH), the medicine is indicated for use in adults and certain pediatric populations aged 2 years and above.

Contraindicated Populations (Must Not Use)

The medicine is officially contraindicated in patients who meet the following regulatory criteria:

  • Concomitant Medication: Patients concurrently using any form of organic nitrate (e.g., nitroglycerin) or Guanylate Cyclase (GC) Stimulators (e.g., riociguat).
  • Cardiovascular History: Patients with a history of recent cardiac events (e.g., myocardial infarction within the last 90 days or stroke within the last 6 months), unstable angina, or severe, uncontrolled hypotension.
  • Ocular History: Patients who have experienced Non-Arteritic Anterior Ischaemic Optic Neuropathy (NAION) resulting in vision loss.

Restricted or Conditional Use

Use is not recommended or requires caution in populations with specific health conditions, as documented in official labeling:

Condition/Group Regulatory Status Constraint
Severe Renal Impairment Not Recommended / Limited Use Once-daily use is not recommended; maximum dosage is restricted for as-needed use.
Severe Hepatic Impairment Not Recommended Use is generally not recommended due to limited clinical data.
Predisposed to Priapism Use with Caution Caution is advised for patients with anatomical deformation of the penis (e.g., Peyronie's disease) or blood disorders (e.g., sickle cell anaemia).
Pediatric Population (ED/BPH) Not Indicated There is no relevant use established for these indications in children or adolescents.
Pregnancy/Lactation Not Established / Avoid Use For ED/BPH, the drug is not indicated for women. For PAH, use is reserved for when the benefit justifies the risk. The drug is known to be excreted in animal milk.

What should I know about interactions with other medicines?

Pawar Interactions with other medicines and products

Official regulatory documentation requires strict attention to interactions with other medicines due to how Pawar is processed by the body and its potential effect on heart rhythm.

Interaction Category Examples of Interacting Medicines Official Restriction/Constraint
Strong CYP3A4 Inhibitors Ketoconazole, Ritonavir, certain Macrolide antibiotics Contraindicated (Avoid use entirely) due to significantly increased Pawar exposure.
Strong CYP3A4 Inducers Rifampin, Phenytoin, Carbamazepine, St. John's wort Contraindicated (Avoid use entirely) due to significantly decreased Pawar exposure and potential loss of effect.
Other QTc-Prolonging Agents Amiodarone, Quinidine Contraindicated (Avoid use entirely) due to additive risk of cardiac rhythm changes (QTc prolongation).

Co-administration with moderate CYP3A4 inhibitors (such as certain antibiotics) requires the patient's condition and the effects of Pawar to be closely monitored by a healthcare professional. Pawar is a substrate of the CYP3A4 enzyme; therefore, its use may also alter the exposure of other medicines that are also metabolized by this enzyme, necessitating monitoring of those co-administered agents. The official interaction profile is structured around these prohibitions, requirements for clinical and ECG monitoring, and the potential for food to alter its absorption.

Mechanism of Action

Selective Inhibition of the PDE5 Enzyme

Pawar (Tadalafil) is a selective inhibitor of the enzyme Phosphodiesterase type 5 (PDE5), which is highly concentrated in the smooth muscle cells of blood vessel walls. Its action prevents the degradation of the crucial second messenger molecule, cyclic Guanosine Monophosphate (cGMP). This preservation of cGMP is the essential molecular step that enables the body's natural relaxation signal to be prolonged.

The NO-cGMP Pathway and Vascular Tone Modulation

This mechanism is entirely dependent on the release of Nitric Oxide (NO) from local nerve endings or endothelial cells, which occurs as a result of physiological signaling. NO initiates the relaxation signal by stimulating cGMP production; Pawar then maintains the cGMP concentration by blocking its breakdown. The resulting accumulation of cGMP triggers a molecular cascade that lowers calcium levels in the muscle cell, leading to smooth muscle relaxation and resultant vasodilation (widening of the local blood vessels).

Mechanistic Context and Constraints

While highly selective, the mechanism is rate-limited because it can only amplify a signal that is already present. The drug cannot initiate the physiological change; it is entirely dependent on the presence of Nitric Oxide. Furthermore, Tadalafil exhibits a minor inhibitory effect on other related enzymes, such as PDE11. The mechanism modulates smooth muscle tone but is physiologically constrained by severe physical or structural limitations to blood flow.

Dosage and Administration Information

How to Use Pawar

The usage of Pawar (Tadalafil) is defined by official administrative guidelines that specify the route, frequency, and dosing structure across its approved indications. The medicine is supplied as a film-coated tablet intended for oral administration. It may be taken with or without food, providing flexibility for daily consumption.

Official Dosing Regimens and Frequency

Official instructions establish two main dosing patterns, with the specific milligram strength strictly linked to the condition being addressed.

Indication and Regimen Standard Dosing Range Frequency Special Condition
Erectile Dysfunction (As Needed) 5 mg to 20 mg Up to Once Daily Must be taken at least 30 minutes prior to use.
Erectile Dysfunction / BPH (Daily Use) 2.5 mg to 5 mg Once Daily Taken at approximately the same time each day.
Pulmonary Arterial Hypertension 40 mg Once Daily Must be taken as a single administration (e.g., two 20 mg tablets).

Procedural Administration Constraints

For continuous daily regimens, such as those for BPH and PAH, official guidance states that if a dose is missed, the patient should simply resume the usual schedule; no extra dose should be taken to compensate. In cases of severe renal or hepatic impairment, the official label indicates that daily use may be not recommended, or the maximum allowable dose must be significantly reduced. The maximum dose for any indication cannot be exceeded within a 24-hour period.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Pawar (Tadalafil)

The research evidence for Pawar is derived primarily from carefully designed randomized, double-blind, placebo-controlled trials (RCTs) across its studied indications. These studies help show what has been observed so far regarding specific functional and symptomatic changes in defined patient populations.


Evidence for Studies in Erectile Dysfunction (ED)

The core evidence for Pawar was studied for ED in numerous short-term RCTs, typically lasting about 12 weeks, which compared the study agent against a placebo. These trials enrolled a wide-ranging population of adult men with ED. Subgroups investigated included those with co-occurring conditions, such as diabetes mellitus and controlled hypertension.

Studies documented measured differences in the IIEF-EF score (a patient-reported scale) between the start and the end of the trial period. The research also highlights patterns related to patient reports of sexual attempts recorded during the study period. The majority of the definitive evidence comes from these short-term trials, limiting insights into durability and outcomes over many years.


Evidence for Studies in Benign Prostatic Hyperplasia (BPH)

The evidence base for BPH focuses on the treatment of Lower Urinary Tract Symptoms (LUTS), stemming from short-term (12-week) RCTs in adult men with LUTS/BPH. Studies monitored patient-reported outcomes using scales like the International Prostate Symptom Score (IPSS), and also examined objective functional measures such as the Maximum Urinary Flow Rate ( Q max).

Trials exploring short-term symptom changes data show patterns related to measured differences in the total IPSS score and its subscores compared to placebo. However, research highlights that the findings for objective measures like Q max have shown variability and may not always be significantly different across all key studies.


Evidence for Studies in Pulmonary Arterial Hypertension (PAH)

Major controlled trials for PAH utilized a large, 16-week, placebo-controlled study that enrolled both men and women. These studies research examined outcomes reflecting daily functioning, primarily focusing on the 6-Minute Walk Distance (6MWD) and Time to Clinical Worsening (TCW).

Research highlights changes measured during the study period, documenting patterns of increased distance covered in the 6MWD compared to the placebo group. What remains uncertain is the need for more comparative evidence; there is a noted lack of published direct comparison trials against other established agents in the same class for long-term PAH outcomes.


Long-Term Research and Follow-up Duration

While the initial evidence for all indications was established in short-term trials, extended research and open-label follow-up studies have been conducted. For ED, some evidence is derived from studies extending up to 2 years to gather additional data during extended observation. This longer-term observation was studied to gather additional data, rather than to establish long-term measures of change. For all indications, data are still emerging, and long-term effects are not fully established beyond the observation periods of these extension trials.


What Remains Uncertain About the Research

Scientific evidence always includes limitations. A primary limitation is that follow-up durations were limited in many primary trials, meaning that long-term outcomes are not fully established. For BPH, findings were mixed on certain objective measures like urinary flow rate. Furthermore, comparative evidence is lacking in some areas, such as the direct comparison of Pawar against other similar treatments for long-term PAH outcomes. In all cases, findings describe group patterns, not personal outcomes, and research does not determine whether an individual will respond similarly.

Key Studies & References

  1. Role of application of tadalafil 5 mg once-daily (≥6 months) in men with erectile dysfunction from six randomized controlled trials - Translational Andrology and Urology

Frequently Asked Questions (FAQ)

Common questions about Pawar (FAQ)


Q: Why do some people say they felt better right away after starting Pawar?

Studies and official information indicate that the medicine is readily absorbed after oral administration. The highest concentrations of the drug in the blood are typically reached within about two hours after a dose is taken.

Q: Is it common to feel unusually tired when you first start taking Pawar?

Fatigue, or tiredness, has been reported as an adverse reaction in the official safety profile of the medicine. Like other side effects, it may be more noticeable when treatment is initiated.

Q: How long does Pawar stay in your system after you stop taking it?

The medicine is known for its prolonged duration of action, which is linked to its half-life. Official studies indicate that the mean terminal half-life—the time it takes for half of the drug to leave the body—is approximately 17.5 hours in healthy subjects.

Q: Does Pawar interact with blood pressure medications?

Official regulatory documentation describes required attention regarding interactions with blood pressure medications. Specifically, using the drug alongside certain alpha-blockers may require caution due to the potential for further lowering of blood pressure.

Q: Why do official documents warn against driving when taking Pawar?

Warnings related to driving or operating machinery are included because adverse reactions such as dizziness, headache, and changes in vision have been reported. These effects, though not experienced by everyone, may potentially impair the ability to perform these tasks.

Q: What is the earliest age someone is generally eligible to take Pawar?

Eligibility depends on the condition being treated. For the treatment of Pulmonary Arterial Hypertension (PAH), the medicine has been studied and may be prescribed to certain pediatric populations starting at 2 years of age. However, for Erectile Dysfunction (ED) and Benign Prostatic Hyperplasia (BPH) indications, the drug is not indicated for use in those under 18 years old.

Q: Does Pawar treat the cause of the condition or just the symptoms?

The drug's mechanism of action involves promoting smooth muscle relaxation and widening of blood vessels (vasodilation), which addresses physiological changes related to the condition's symptoms. For chronic conditions such as PAH, the medicine is described in regulatory documents as helping to control the condition, but not curing it.

Q: What are the main research findings about long-term use of Pawar?

Official documentation notes that while initial evidence was established in short-term trials, observational follow-up studies have extended up to 2 years to gather additional data. However, long-term effects beyond the duration of these extension trials are not fully established.

Q: What happens if you take Pawar and drink alcohol?

Regulatory information describes that substantial alcohol consumption, defined as five units or more, is associated with increased risk and is generally advised to be limited or avoided. This combination may increase the risk of symptoms like dizziness, headache, or a decrease in standing blood pressure.

Q: Can Pawar cause issues with sleep?

Sleep disturbances, including reports of insomnia (difficulty falling or staying asleep), have been documented as an adverse reaction in the safety profile of the medicine.

Q: What kind of monitoring might be needed while taking Pawar?

The need for general monitoring is addressed by official regulatory context and is typically determined on a case-by-case basis. For some patients, monitoring of blood pressure may be recommended, particularly when treatment is initiated or if a dose adjustment is made.

Q: What are the biggest differences between Pawar and the older medicines for the same condition?

A key distinguishing feature noted in official pharmacology documents is the drug's prolonged half-life. At a molecular level, it is also described as having a minor inhibitory effect on the related enzyme PDE11, in addition to its primary effect on PDE5.

Q: Is there a generic version of Pawar available?

Yes, the active ingredient in Pawar, which is Tadalafil, is the generic name for the medicine. Tadalafil is generally available in generic formulations.

Q: Are there specific lab tests required before starting Pawar?

Regulatory information does not typically indicate that routine laboratory bloodwork is required prior to or during treatment with the medicine. A healthcare professional's assessment remains necessary to consider individual health conditions and determine the need for monitoring.

Q: Are there different strengths or formulations of Pawar?

The drug is supplied as tablets in multiple strengths as defined by official dosing regimens. Additionally, an oral suspension formulation is available, which is sometimes used for the Pulmonary Arterial Hypertension (PAH) indication.

Q: Why do official prescribing documents have so many warnings?

Regulatory documents, such as the Prescribing Information, are required by governmental authorities to comprehensively document every known risk, contraindication, and adverse reaction identified to inform healthcare professionals and patients.

Q: Can Pawar affect fertility?

Official documentation describes studies that showed a decrease in sperm concentrations for some dose levels. However, the regulatory text notes that the clinical significance of this finding is unknown, and there have been no studies specifically evaluating the drug's effect on male fertility.

How should Pawar be stored and disposed of?

How to Store and Dispose of Pawar?

Pawar tablets (Tadalafil) must be stored strictly according to official regulatory labeling to ensure stability and safety.

Requirement Official Condition
Temperature Store at controlled room temperature, 25 C (77 F), with excursions permitted between 15 C and 30 C (59 F and 86 F).
Protection Keep tablets in the original container and protect from moisture.
Child Safety Keep this medicine out of the sight and reach of children.

Unused or expired Pawar should be disposed of via a drug take-back program. Tadalafil is not on the list of medicines recommended for flushing. If a take-back program is unavailable, mix the tablets with an undesirable substance, seal in a bag, and place in the household trash. Disposal must avoid entry into wastewater.

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

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