Zenegra Red 100 mg Tablet

Zenegra Red 100 is a product of Alkem Laboratories Ltd which helps males with erectile dysfunction issues. The active pharmaceutical ingredient present inside the medicine is Sildenafil citrate which blocks the PDE type5 and introduces a harder erection.


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Zenegra Red 100 is a distinguished formulation from Alkem Laboratories Ltd. This medication is specifically designed to provide a viable solution for males grappling with erectile dysfunction (ED). Containing Sildenafil citrate as its active pharmaceutical ingredient (API), Zenegra Red 100 has shown promising results in facilitating firmer erections.

Composition and Packaging

Alkem Laboratories, manufactures Zenegra Red 100 in India. A single box comes with two blister-packed strips, and each strip houses four tablets. Notably, these tablets are reddish-brown, triangular, biconvex, and feature curved edges. Each tablet delivers a 100 mg dose of its API, Sildenafil citrate.

Mechanism of Action

How Zenegra Red 100 Tackles ED

Physicians often recommend Zenegra Red 100 for its efficacy in managing erectile dysfunction in men. The medication functions by enhancing blood circulation to the penile region, thereby aiding in both achieving and sustaining an erection.

The Biochemical Process

Upon sexual stimulation, the penile nerves release nitric oxide which stimulates cGMP production. This leads to the relaxation of smooth muscles in the penis, thereby enhancing blood flow and consequently facilitating an erection. Experts note that Sildenafil citrate operates by inhibiting PDE5 actions. This inhibition results in elevated cGMP levels, further enhancing blood vessel dilation and relaxation in the penile region. As a result, this allows for more effective blood flow during sexual activities, culminating in a more robust erection.

Uses of Zenegra Red 100

Zenegra Red 100 is a medication containing Sildenafil. Physicians commonly recommend it for managing erectile dysfunction in men,

How to Administer Zenegra Red 100: A Physician’s Guidance

Before consuming Zenegra Red 100, it’s imperative to seek advice from a healthcare expert. Typically, the tablet is consumed orally and should be taken approximately one hour before engaging in sexual activity.

Warnings & Precautions: Know Before You Take

Before starting your course of Zenegra Red 100, it’s advisable to consult a physician. This is crucial if you have pre-existing medical conditions such as heart ailments, liver issues, or kidney diseases. Physicians also strongly advise against mixing this medication with alcohol or other specific medications, as it can lead to adverse effects.


Dosage requirements can differ from one individual to another. Physicians generally initiate the treatment with a 50mg dose and adjust it based on your body’s response and medical history. Self-adjusting the dosage is strongly discouraged; consult your healthcare provider for any changes.

Foods and Beverages to Avoid

While you’re on Zenegra Red 100, steer clear of alcohol and grapefruit juice, as these can interact with the medication, potentially diminishing its efficacy or increasing the risk of side effects. For a comprehensive list of what to avoid, it’s best to consult a healthcare professional.

Side effects of Zenegra Red 100 mg pills

Common side effects

it is generally safe and effective, but it can cause side effects in some people. Common side effects of Zenegra Red tablets include:

  • Headache
  • Flushing of the face
  • Upset stomach
  • Nasal congestion
  • Dizziness or lightheadedness
  • Blurred vision or changes in color vision

These side effects are usually mild and go away within a few hours. However, speaking with a healthcare professional is essential if they persist or become severe.

Less common side effects

For a comprehensive list of potential side effects, please refer to the Sildenafil Citrate side effects page.

Storage condition

Zenegra Red tablets should be stored in a cool, dry place at room temperature between 15 and 30 degrees Celsius. They should be kept away from moisture, heat, and direct sunlight.

It is essential to store Zenegra Red tablets out of the reach of children and pets and in their original containers with the label attached. Do not use Zenegra Red tablets if they are expired or damaged.


For detailed information on the interactions of Zenegra Red 100 with drugs, alcohol, supplements, food, and diseases, please visit the Sildenafil Interaction page.

Zenegra Red 100 and Alcohol/Supplements/Food Interactions

  • Alcohol (Ethanol)  and Zenegra Red 100

    • Increased risk of heart problems
    •  Reduced effectiveness of sildenafil
    • Increased risk of side effects
  • Zenegra Red 100 and Supplements/foods Interactions

    • Yohimbine: Drop in blood pressure.
    • L-arginine: Dangerous drop in blood pressure
    • Grapefruit juice: It Can lead to a higher risk of side effects

Zenegra Red 100 drug interactions

  • Major drug interactions

    • Indinavir (Crixivan)
    • Riociguat (Adempas)
    • Nelfinavir (Viracept)
    • Cobicistat (Tybost)
    • Clarithromycin (Biaxin)
    • Nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Minitran, Nitro-Bid, Rectiv, GoNitro)
    • Nefazodone (Serzone)
    • Adagrasib
    • Idelalisib (Zydelig)
    • Isosorbide (Isordil, Dilatrate-SR)
    • Erythromycin (Erythrocin)
    • Atazanavir (Reyataz)
    • Lonafarnib (Zokinvy)
    • Boceprevir (Victrelis)
    • Avanafil (Stendra)
  • Moderate drug interactions

    • Citalopram
    • Atorvastatin
    • Lisinopril
    • Losartan
    • Amiodarone
    • Simvastatin
    • Omeprazole
    • Metoprolol
    • Hydrochlorothiazide
    • Levothyroxine
    • Carvedilol
    • Azithromycin

Zenegra Red 100 disease interactions

  • Disease Interactions that are of high clinical significance.

    • pulmonary veno-occlusive disease (PVOD): Worsening symptomsof PVOD and potentially life-threatening complications.
    • Cardiovascular Disease: May experience a significant drop in blood pressure
    • Renal dysfunction: may result in drug accumulation.
  • Disease Interactions that are of less clinical significance.

    • Priapism
    • Alcoholism
    • Hearing Loss
    • Liver Disease
    • Retinitis Pigmentosa
    • Seizure Disorders

Related Products


  • Definition & Facts for Erectile Dysfunction: niddk.nih.gov. Available online: Reference Link
  • Sildenafil: MedlinePlus Drug Information. Available online: Reference Link
  • Sildenafil Interactions: Drugs.com. Available online: Reference Link
  • Sildenafil (Oral Route) Side Effects: Mayoclinic.org. Available online: Reference Link
  • Drugs Approved by Central Drugs Standard Control Organisation: Drug Name, Strength, Indication. Available online: Reference Link


    • Medzpills aims to provide visitors with reliable, trustworthy, and expert-reviewed information. This article has been reviewed by Parry Stone, an expert in the field. However, it is important to note that the information presented should not be used as a substitute for the advice of a qualified medical professional. The information provided serves only as a source of knowledge and may not cover all aspects of health conditions, lab tests, medications, potential side effects, drug interactions, warnings, alerts, and more.
    • It is highly recommended to consult with your doctor and address any concerns or questions you may have about a specific disease or medication. At Medzpills, we strive to supplement, rather than replace, the essential doctor-patient relationship.
Active Ingredient

Sildenafil Citrate

Delivery Time:

7 to 15 days


Erectile Dysfunction


Alkem Pharma, India


4 Tablets in Strip


100 mg


below 30°C

Equivalent Brand


Pharmaceutical Form


Country of origin



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