Sildenafil
- Also Known As
- Generic Viagra®
- Onset
- 30–60 minutes
- Duration
- 4–6 hours
- Best For
- On-demand use
- Dosing
- Taken before activity
GET STARTED

Answer a few questions online. No appointments, no waiting rooms.

A licensed clinician reviews your profile and builds your unique protocol.

Your medication ships discreetly. Your healthcare journey begins.
The OndaRx Difference
Sildenafil and Tadalafil — two of the most clinically validated ED medications available, prescribed online and delivered discreetly.
$90 /per month
$66 /per month
Price includes consultation, care, medication, supplies, shipping, and support.
The Science
Erectile dysfunction affects an estimated 30 million men in the United States, across all ages. Stress, sleep deprivation, hormonal imbalance, and cardiovascular factors all play a role. For many men, it's less about physical dysfunction and more about the compounding effect of a high-output life.
Sildenafil and Tadalafil are two of the most studied medications in men's health, with decades of clinical data supporting their safety and effectiveness. The difference between them comes down to timing and lifestyle fit: Sildenafil is on-demand and fast-acting; Tadalafil offers flexibility with effects lasting up to 36 hours, making it popular for daily use.
Both are prescribed by a licensed OndaRx provider after a simple online intake. No awkward conversations. No waiting rooms.

Also Known As
Onset
Duration
Best For
Dosing
Sildenafil
Generic Viagra®
30–60 minutes
4–6 hours
On-demand use
Taken before activity
Tadalafil
Generic Cialis®
30–60 minutes
Up to 36 hours
Daily or as-needed use
Daily low-dose or as-needed
Two clinically proven options — your provider helps you choose the right one for your lifestyle.
Sildenafil and Tadalafil have decades of clinical safety and efficacy data among the most studied medications in men's health worldwide.
Your medication ships in plain, unmarked packaging with no labels — prescribed online, and delivered directly to your door.
On-demand or daily protocols are both available — your provider recommends the right fit based on your lifestyle and how you want to use it.
Sildenafil and Tadalafil have decades of clinical safety and efficacy data among the most studied medications in men's health worldwide.
Your medication ships in plain, unmarked packaging with no labels — prescribed online, and delivered directly to your door.
On-demand or daily protocols are both available — your provider recommends the right fit based on your lifestyle and how you want to use it.
The OndaRx Difference