Sildenafil (Generic Viagra)
- Type
- PDE5 inhibitor
- Use Type
- On-demand (as-needed)
- Onset
- 30-60 minutes
- Duration
- 4-6 hours
- Daily Dose Option
- No
- Best For
- Men who prefer planning around a dose
- Generic Available
- Yes (since 2017)
- FDA Approved
- Yes
Sildenafil Online Prescription: Generic Viagra, Physician-Prescribed and Delivered Discreetly
Sildenafil is the active ingredient in Viagra, clinically proven, FDA-approved, and available through Eros MD with a licensed provider consultation. Same efficacy. Significantly lower cost.
Same Active Ingredient as Viagra
Licensed US Pharmacies
Licensed Physicians
Unmarked Shipping
about Sildenafil
What Is Sildenafil and How Does It Work for Erectile Dysfunction?
Sildenafil is a PDE5 inhibitor, a class of medications that improve blood flow to the penis to support erections. It was originally developed as a cardiovascular medication and was approved by the FDA in 1998 under the brand name Viagra. Generic sildenafil has been available in the United States since 2017, making physician-prescribed ED treatment significantly more affordable.
When you're sexually aroused, your body releases nitric oxide, which triggers a chemical chain reaction that causes the smooth muscle in the penis to relax, allowing blood to flow in. PDE5 is an enzyme that breaks down cGMP, the molecule that sustains this relaxation and blood flow. Sildenafil works by blocking PDE5, keeping cGMP levels elevated so that blood flow is supported and erections are easier to achieve and maintain.
It's important to understand that sildenafil does not create an erection on its own. Sexual stimulation is still required. The medication supports your body's natural erectile response by making it more reliable and consistent.
What Is Sildenafil
Sildenafil is the active ingredient in Viagra. It is a PDE5 inhibitor that improves blood flow to the penis to help men with erectile dysfunction achieve and maintain erections. It is FDA-approved and available by prescription online through Eros MD.
understanding sildenafil
Sildenafil vs Viagra: What's the Difference?
The short answer: nothing clinically significant. Generic sildenafil contains the exact same active ingredient (sildenafil citrate) as brand-name Viagra, in the same formulations and doses. Both are manufactured to the same FDA standards. The only meaningful difference is cost: generic sildenafil is a fraction of the price of brand-name Viagra.
the details
Sildenafil Dosage: What to Expect from Your Eros MD Prescription
Sildenafil is typically taken 30-60 minutes before sexual activity. It is not meant to be taken more than once in a 24-hour period. The appropriate starting dose depends on your age, health profile, and other medications. Your Eros MD provider will determine the right dose for you. Many patients start at 50mg and adjust based on response.
Important Note
Do not take sildenafil with nitrate medications (used for chest pain or heart conditions). This combination can cause a dangerous drop in blood pressure. Your Eros MD provider screens for this during your assessment.
Available Doses
25mg | 50mg | 100mg
How Long It Works
Effects are generally active for 4-6 hours following administration. Results vary by individual.
With or Without Food
Sildenafil can be taken with or without food, but high-fat meals may delay onset. Taking on an empty stomach or with a light meal typically produces the fastest results.
medication comparison
Sildenafil vs Tadalafil: Which Is Right for You?
Tadalafil (Generic Cialis)
- Type
- PDE5 inhibitor
- Use Type
- On-demand or daily
- Onset
- 30-60 minutes
- Duration
- Up to 36 hours
- Daily Dose Option
- Yes (2.5mg or 5mg)
- Best For
- Men wanting spontaneity or daily vascular support
- Generic Available
- Yes (since 2018)
- FDA Approved
- Yes
Feature
Type
Use Type
Onset
Duration
Daily Dose Option
Best For
Generic Available
FDA Approved
Sildenafil (Generic Viagra)
PDE5 inhibitor
On-demand (as-needed)
30-60 minutes
4-6 hours
No
Men who prefer planning around a dose
Yes (since 2017)
Yes
Tadalafil (Generic Cialis)
PDE5 inhibitor
On-demand or daily
30-60 minutes
Up to 36 hours
Yes (2.5mg or 5mg)
Men wanting spontaneity or daily vascular support
Yes (since 2018)
Yes
the fine print
Sildenafil Side Effects and Safety Information
Common Side Effects
Headache (most common)
Flushing
Nasal congestion
Upset stomach
Vision changes (temporary blueish tint or light sensitivity)
These are typically mild and resolve quickly
Serious Contraindications
Do not use with: nitrate medications (nitroglycerin, isosorbide), alpha-blockers, or other PDE5 inhibitors. Not recommended for men with severe heart disease, recent stroke or heart attack, or low blood pressure. Seek immediate medical attention if you experience an erection lasting more than 4 hours (priapism).
Eros MD Safety Process
Your Eros MD provider reviews your full medical history, current medications, and health conditions before prescribing sildenafil. This screening process is designed to ensure sildenafil is appropriate and safe for you specifically.
How it works
How to Get a Sildenafil Prescription Online Through Eros MD
Getting a sildenafil prescription online through Eros MD is straightforward, private, and physician-supervised. Here's the process:
01
Complete your confidential health assessment, covering your sexual health, medical history, current medications, and goals. Takes about 5-10 minutes.
02
A licensed physician reviews your assessment personally, screens for contraindications, and determines if sildenafil is appropriate for you.
03
If prescribed, your sildenafil is dispensed by a licensed US pharmacy at the dose your provider recommends.
04
Your medication is delivered in discreet, unmarked packaging. Nothing on the outside identifies what's inside.
05
Your provider is available for follow-up questions, dosage adjustments, and ongoing support.
Questions worth asking
Frequently Asked Questions About Sildenafil
Yes. Sildenafil is the active ingredient in Viagra. Generic sildenafil and brand-name Viagra contain the exact same compound (sildenafil citrate) in the same doses, manufactured to the same FDA standards. The only difference is cost. Generic sildenafil is significantly less expensive.
Sildenafil typically begins working within 30-60 minutes. Taking it on an empty stomach or with a light meal may result in faster onset. Effects last approximately 4-6 hours.
The most common side effects include headache, flushing, nasal congestion, upset stomach, and temporary vision changes. These are typically mild and resolve on their own. Your Eros MD provider can discuss strategies to minimize side effects.
Sildenafil is designed for on-demand use, taken before sexual activity, not more than once in 24 hours. If you prefer a daily option, your Eros MD provider may recommend daily tadalafil instead.
Yes. Sildenafil is a prescription medication. Eros MD provides a physician consultation online. If you qualify medically, your provider will issue a prescription dispensed from a licensed US pharmacy.
Eros MD provides transparent pricing. Generic sildenafil is significantly less expensive than brand-name Viagra. You'll see the full cost of your treatment plan before committing. No hidden fees.