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Zenegra 100 mg (Sildenafil Citrate)

Active IngredientsSildenafil Citrate
Strength100 mg
Dosage FormTablet
Therapeutic CategoryMen’s health
ManufacturerAlkem Laboratories Ltd.
Packaging4 tablets in 1 strip
Storage ConditionsCool and dry place
Packaging TypePlain and discreet

Pack SizePrice/UnitPriceQuantity 
60 Tablet/s$1.00$60.00
120 Tablet/s$0.91$110.00
160 Tablet/s$0.87$140.00
200 Tablet/s$0.80$160.00

Price range: $60.00 through $160.00

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📅 Last Updated on 14 Jul 2026

What Is Zenegra 100 mg?

Zenegra 100 mg is a prescription Sildenafil tablet made for adult men who face Erectile Dysfunction. Sildenafil Citrate is the active salt in the tablet. It helps blood vessels relax in the right area of the body, so blood can flow better during sexual arousal. Without sexual stimulation, Zenegra 100 mg will not create an erection on its own.

Many men choose Sildenafil-based tablets because the salt is well known in ED treatment. Zenegra 100 mg is one of the higher-strength Sildenafil options, so dose selection must be handled with care. Men who are new to Sildenafil are often started on a lower strength first, based on health condition, age, and response.

Generic Name of Zenegra 100 mg

The generic name of Zenegra 100 mg is Sildenafil Citrate. Sildenafil is the same active ingredient used in many ED tablets. Different brands may contain the same salt, but strength, manufacturer, packaging, and pricing can be different.

Zenegra 100 mg Manufacturer

Zenegra 100 mg is manufactured by Alkem Laboratories, India. Alkem is a known pharmaceutical company that produces many prescription and over-the-counter medicines for different health needs.

Uses of Zenegra 100 mg

Zenegra 100 mg is mainly used for erectile dysfunction in adult men. ED can happen due to stress, age, poor blood flow, diabetes, high blood pressure, lifestyle habits, or other health concerns. A doctor may suggest Sildenafil after checking whether the person can safely use it.

Zenegra 100 mg may be used for:

  • Erectile dysfunction
  • Weak erection
  • Trouble keeping an erection
  • Sildenafil-based ED treatment
  • Pulmonary arterial hypertension, only when prescribed for that purpose

For ED, Zenegra 100 mg does not increase sexual desire. It supports the body’s natural erection response only when sexual arousal happens.

How Zenegra 100 mg Works

Zenegra 100 mg contains Sildenafil Citrate, a PDE5 inhibitor. During sexual stimulation, the body releases natural signals that relax blood vessels in the penile area. Sildenafil supports that process by helping blood stay in the penile tissues for a firm erection.

For pulmonary arterial hypertension, Sildenafil may relax blood vessels in the lungs and support blood flow there. The use, dose, and schedule for PAH are different from ED use, so the same tablet should not be taken for PAH without a prescription plan.

Benefits of Zenegra 100 mg

Zenegra 100 mg may help men who struggle with erection firmness and performance confidence. Better erection support can reduce stress around intimacy when ED is the main concern. The tablet is taken only when needed for ED, which makes it different from daily-use medicines.

Possible benefits include:

  • Supports stronger erection response
  • Helps maintain erection during sexual activity
  • Contains Sildenafil Citrate 100 mg
  • Useful for adult men with ED
  • May work for several hours after dosing
  • Available as a branded generic Sildenafil option

The result can differ from person to person. Food habits, alcohol, stress, health condition, and other medicines can change how well it works.

Zenegra 100 mg Dosage

For erectile dysfunction, Sildenafil is often taken around 30 minutes to 1 hour before sexual activity. Some men may feel the effect within 30 minutes, while others may need more time. The usual maximum dosing frequency for Sildenafil ED tablets is once in 24 hours.

Zenegra 100 mg is a strong dose. Men who have never used Sildenafil before may not need 100 mg at the start. Lower strengths may be safer for some users, especially older men or those taking other medicines. Dose changes should be made only after medical guidance.

How to Take Zenegra 100 mg

Swallow it with water. Do not crush, chew, or break the tablet unless the prescription says so. It can be taken with or without food, but a heavy or oily meal may slow down the effect.

Avoid taking more than one tablet in a day. Alcohol can increase dizziness, low blood pressure, and weak response, so it is better to keep alcohol low or avoid it while using Sildenafil.

How Long Does Zenegra 100 mg Last?

Zenegra 100 mg may work for around 4 to 6 hours in many men. The timing is not the same for everyone. Age, food, alcohol, stress, liver health, kidney health, and other medicines can affect the duration.

The erection does not stay for the full duration. Sexual stimulation is still needed. A painful erection lasting more than 4 hours needs urgent medical help because it can harm penile tissue.

Missed Dose

For ED, Zenegra 100 mg is usually taken only when needed, so a missed dose is not a major issue. Do not take an extra tablet to cover a missed dose.

For PAH or any scheduled Sildenafil use, follow the dose timing given by the prescriber. Do not double the next dose.

Overdose

Taking extra Zenegra 100 mg can increase the risk of headache, flushing, dizziness, fainting, vision changes, chest discomfort, low blood pressure, and prolonged erection. A very high dose can be dangerous, especially for men with heart or blood pressure concerns.

Medical help is needed if overdose is suspected, especially when chest pain, severe dizziness, breathing trouble, fainting, or an erection lasting over 4 hours appears.

Side Effects of Zenegra 100 mg

Zenegra 100 mg can cause mild to serious side effects. Many side effects are temporary, but some need quick medical care.

Common Side Effects

  • Headache
  • Flushing
  • Dizziness
  • Indigestion
  • Stuffy nose
  • Nausea
  • Back pain
  • Muscle pain
  • Loose motion
  • Warm feeling in face or neck

Serious Side Effects

  • Chest pain
  • Sudden vision loss
  • Sudden hearing loss
  • Severe dizziness
  • Fainting
  • Painful erection
  • Erection lasting more than 4 hours
  • Irregular heartbeat
  • Severe allergic reaction
  • Shortness of breath

Stop sexual activity and get medical care if chest pain, severe dizziness, or nausea happens during sex.

Precautions Before Taking Zenegra 100 mg

Zenegra 100 mg may not suit every person. Health history matters before using Sildenafil. Men with heart disease, low blood pressure, recent stroke, recent heart attack, severe liver disease, severe kidney disease, eye problems, or penile deformity need extra care.

Do not use Zenegra 100 mg if Sildenafil caused allergy before. Avoid use with recreational nitrate products as well. Men advised to avoid sexual activity due to heart risk should not take ED tablets without medical approval.

Drug Interactions

Zenegra 100 mg can interact with several medicines. Some combinations may cause a sudden drop in blood pressure or increase Sildenafil levels in the body.

Possible interactions include:

  • Nitrates such as nitroglycerin
  • Riociguat
  • Alpha-blockers
  • Blood pressure medicines
  • Some antifungal medicines like ketoconazole
  • Some antibiotics like clarithromycin
  • HIV protease inhibitors
  • Other ED medicines
  • Certain seizure medicines
  • Heavy alcohol use

Share all current medicines, supplements, and herbal products with the prescriber before using Zenegra 100 mg.

When Not to Use Zenegra 100 mg

Avoid Zenegra 100 mg if you take nitrate medicines for chest pain or riociguat for pulmonary hypertension. These combinations can cause unsafe blood pressure drops.

Zenegra 100 mg is also not suitable for children. Women should not use it for erectile dysfunction. Men with serious heart problems, very low blood pressure, recent stroke, recent heart attack, or severe allergy to Sildenafil should not use it unless a doctor has clearly approved it.

Alcohol and Food With Zenegra 100 mg

A heavy meal can delay the effect of Zenegra 100 mg. Light food is usually easier if the tablet is planned before sexual activity. Grapefruit or grapefruit juice may affect Sildenafil levels in some people, so caution is better.

Alcohol can reduce erection quality and increase side effects like dizziness, flushing, and low blood pressure. Safer use means keeping alcohol low or avoiding it.

Frequently Asked Questions (FAQs)


Zenegra 100 mg is used for erectile dysfunction in adult men. It helps men get and keep a firm erection when sexual stimulation is present. Sildenafil may also be used for pulmonary arterial hypertension in certain cases, but the dose plan is different.


Yes. Zenegra 100 mg contains Sildenafil Citrate as the active ingredient. Sildenafil is the generic salt, while Zenegra is the brand name.


Zenegra 100 mg may start working within 30 to 60 minutes. A heavy meal can slow the start time. Sexual stimulation is needed for the tablet to show its effect.


Alcohol is not a good mix with Zenegra 100 mg. It can increase dizziness, flushing, low blood pressure, and poor erection response.


Men using nitrates, riociguat, or other unsafe interacting medicines should not take Zenegra 100 mg. Men with serious heart problems, very low blood pressure, recent stroke, recent heart attack, or Sildenafil allergy should avoid it unless cleared by a doctor.


No. Zenegra 100 mg does not increase sexual desire. It supports erection response when sexual arousal is already present.


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