Description
Viagra 100mg (Sildenafil)
Viagra 100mg contains sildenafil citrate, a prescription medication used for the treatment of erectile dysfunction (ED) in adult men.
This page provides general information about Viagra 100mg, including its approved use, prescription requirements, dosage considerations, side effects, drug interactions, and important safety information.
Viagra should only be used by the person for whom it was prescribed and according to the directions provided by a qualified healthcare professional.
Viagra 100mg Medication Overview
Viagra is the brand name for sildenafil citrate, a phosphodiesterase-5 (PDE5) inhibitor.
Viagra works by helping increase blood flow to the penis during sexual stimulation, which can help men with erectile dysfunction achieve and maintain an erection.
Viagra does not increase sexual desire and does not produce an erection without sexual stimulation.
What Is Viagra 100mg Used For?
Viagra is approved for the treatment of erectile dysfunction in adult men.
The appropriate treatment and dosage depend on individual medical circumstances, other medications, and the patient’s response to treatment.
A healthcare professional should determine whether Viagra is appropriate for you.
Viagra 100mg Prescription Information
Viagra 100mg is a prescription medication.
A valid prescription from an appropriately licensed healthcare professional is required before a pharmacy can dispense the medication.
Patients should not use Viagra prescribed for another person or obtain sildenafil from an unauthorized source.
Viagra 100mg Dosage Information
The FDA prescribing information states that the usual recommended dose of Viagra for most patients is 50mg taken as needed approximately one hour before sexual activity.
Depending on effectiveness and tolerability, the dose may be increased to a maximum recommended dose of 100mg or decreased to 25mg.
The maximum recommended dosing frequency is once per day.
For this reason, Viagra 100mg should only be used when specifically prescribed or directed by a qualified healthcare professional.
Do not take more than the prescribed amount or use Viagra more frequently than directed.
How Long Before Sexual Activity Is Viagra Taken?
Viagra may be taken approximately one hour before sexual activity.
The FDA prescribing information states that Viagra may be taken anywhere from approximately 30 minutes to 4 hours before sexual activity.
Individual response can vary.
Viagra 100mg and Food
Viagra can be taken with or without food.
However, a high-fat meal may delay the onset of activity compared with taking sildenafil under fasting conditions.
Follow the directions provided with your prescription.
Viagra 100mg Side Effects
Viagra may cause side effects.
Common adverse reactions associated with sildenafil include:
- Headache
- Flushing
- Indigestion
- Nasal congestion
- Abnormal vision
- Back pain
- Muscle aches
- Nausea
- Dizziness
This is not a complete list of possible side effects.
Contact your healthcare professional or pharmacist if you experience concerning or persistent symptoms.
Viagra 100mg Safety Information
Viagra has important safety considerations.
Patients should tell their healthcare professional about their medical history and all medications they take before using sildenafil.
Important considerations include:
- Cardiovascular health
- Blood pressure
- Other erectile dysfunction treatments
- Nitrate medications
- Alpha-blockers
- Certain blood-pressure medications
- Other PDE5 inhibitors
- Certain medications that affect sildenafil metabolism
Viagra and Nitrates
Viagra must not be used with nitrate medications.
Examples include certain medications used to treat angina or chest pain.
Combining sildenafil with nitrates can cause a dangerous drop in blood pressure.
Tell your healthcare professional about all medications you take before using Viagra.
Viagra and Riociguat
Viagra should not be used with guanylate cyclase stimulators such as riociguat because the combination can cause significant blood-pressure lowering.
Tell your healthcare professional if you take medications for pulmonary hypertension or other cardiovascular conditions.
Viagra and Alpha-Blockers
Viagra can interact with alpha-blocker medications and may contribute to low blood pressure.
Patients taking alpha-blockers should discuss sildenafil dosing with their healthcare professional before using Viagra.
Viagra Drug Interactions
Before taking Viagra 100mg, tell your healthcare professional or pharmacist about all medications and supplements you use.
This includes:
- Prescription medications
- Over-the-counter medications
- Nitrate medications
- Alpha-blockers
- Blood-pressure medications
- Other erectile dysfunction medications
- Other PDE5 inhibitors
- HIV medications
- Certain antibiotics
- Antifungal medications
- Vitamins
- Herbal supplements
Certain medications can increase sildenafil exposure and may require a different starting dose.
For additional information about medication interactions, visit the Maxson Pharmacy Medication Interaction Guide.
Viagra and Other Erectile Dysfunction Medications
Do not combine Viagra with other PDE5 inhibitors or other erectile dysfunction treatments unless specifically instructed by your healthcare professional.
Using multiple erectile dysfunction medications together may increase the risk of adverse effects, including low blood pressure.
Viagra and Alcohol
Alcohol can temporarily lower blood pressure and may contribute to dizziness or other effects.
Discuss alcohol use with your healthcare professional if you have questions about how it may affect your treatment.
Viagra and Cardiovascular Health
Sexual activity can place additional demands on the cardiovascular system.
Patients with cardiovascular conditions should discuss their ability to safely engage in sexual activity and use erectile dysfunction medication with their healthcare professional.
Viagra should not be used when sexual activity is medically inadvisable because of cardiovascular status.
Viagra 100mg and Vision Changes
Changes in vision can occur with sildenafil.
If you experience a sudden loss of vision in one or both eyes, stop using Viagra and seek immediate medical attention.
Viagra 100mg and Hearing Changes
Sudden hearing loss or a sudden decrease in hearing requires immediate medical attention.
Tell your healthcare professional about any sudden hearing changes after taking sildenafil.
Prolonged Erection and Priapism
A prolonged erection lasting more than four hours requires emergency medical treatment.
Seek immediate medical attention if an erection lasts longer than four hours.
Untreated priapism can result in permanent damage.
Viagra Pharmacy Information
If you have a valid prescription for Viagra 100mg, a pharmacy can provide information about:
- Prescription processing
- Product availability
- Prescription requirements
- Pharmacist support
- Medication questions
- Fulfillment options
Availability can vary by pharmacy, location, prescription requirements, and applicable regulations.
Viagra 100mg Availability
Availability of Viagra 100mg can vary between pharmacies.
If you are looking for a specific prescription strength, contact the pharmacy to confirm current availability and applicable prescription requirements.
Do not substitute a different sildenafil strength without instructions from your healthcare professional.
Frequently Asked Questions
What is Viagra 100mg?
Viagra 100mg is a prescription tablet containing sildenafil citrate. It is used for the treatment of erectile dysfunction in adult men.
Is Viagra 100mg a prescription medication?
Yes. Viagra is a prescription medication and should only be used according to the instructions of a qualified healthcare professional.
What is sildenafil?
Sildenafil is the active ingredient in Viagra and belongs to a class of medications called PDE5 inhibitors.
Is 100mg the maximum Viagra dose?
For most patients, 100mg is the maximum recommended dose according to the FDA prescribing information. The maximum recommended dosing frequency is once per day.
Can Viagra 100mg be taken more than once a day?
No. The FDA prescribing information states that the maximum recommended dosing frequency is once per day.
Can Viagra be taken with nitrates?
No. Viagra is contraindicated with nitrate medications because the combination can cause a dangerous drop in blood pressure.
Does Viagra work without sexual stimulation?
No. Viagra facilitates the physiological response to sexual stimulation; it does not independently cause sexual arousal.
Can Viagra be taken with other erectile dysfunction medications?
Do not combine Viagra with other PDE5 inhibitors or erectile dysfunction medications unless specifically instructed by your healthcare professional.
What happens if an erection lasts more than four hours?
Seek emergency medical treatment immediately. An erection lasting more than four hours can be a medical emergency.
Can Viagra cause side effects?
Yes. Possible side effects include headache, flushing, indigestion, nasal congestion, dizziness, and visual changes.
Can Viagra interact with other medications?
Yes. Viagra can interact with several medications, including nitrates, alpha-blockers, and certain medicines that affect sildenafil metabolism.
Can I change my Viagra dosage?
Do not change your prescribed dosage without speaking with your healthcare professional.
Important Viagra 100mg Safety Reminder
Viagra 100mg is a prescription medication and should be used only as directed by a qualified healthcare professional.
Do not use Viagra with nitrate medications, do not exceed the prescribed dose, and seek emergency medical attention for a prolonged erection lasting more than four hours or sudden serious vision or hearing changes.
This page provides general educational information and does not replace advice from a qualified healthcare professional.







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