Product image is illustrative. Your medication and packaging may look different.
No. 08 · Men's Health
Sildenafil
As needed, for ED
Sildenafil is an FDA-approved PDE5 inhibitor for erectile dysfunction, the generic of Viagra, usually taken about an hour before sex and lasting around 4 hours. RULE Longevity offers sildenafil from $129 a month after a licensed provider reviews your online visit.
| Option | Monthly | Start |
|---|---|---|
| Sildenafil tablets | $129per month | Start |
- Online visit and licensed provider review
- Medication and supplies, if prescribed
- Shipping in discreet packaging
- Messaging with your care team
- Cancel anytime before your next billing date
If you are not prescribed, no medication ships and no subscription starts. Questions first? Use our contact form.
Who it's for
- Men with erectile dysfunction
- Men who prefer an as-needed option with a shorter window
Not for
- Anyone who takes nitrates (such as nitroglycerin) or riociguat
- Men told to avoid sexual activity for heart reasons
- Recent stroke or heart attack, unless your provider approves
Your licensed provider reviews your full history and decides what is appropriate.
How it works
Complete a private online visit, including heart history and medicines
A licensed provider decides whether sildenafil is appropriate
Tablets ship in discreet packaging
Message your care team with questions anytime
Tadalafil vs sildenafil, side by side
| Tadalafil | Sildenafil | |
|---|---|---|
| Works for | Up to about 36 hours | About 4 hours |
| How you take it | As needed, or a daily low dose | As needed, about an hour before |
| Food | Not affected much by food | A heavy meal can slow it |
| Generic of | Cialis | Viagra |
| Never with | Nitrates or riociguat | Nitrates or riociguat |
| RULE price | $129 a month | $129 a month |
Format comparison only, not a comparison of results. A licensed provider decides which, if either, is right for you.
What's included
- Online visit and licensed provider review
- Generic sildenafil tablets
- Discreet shipping
- Messaging with your care team
Important safety information
- Common effects include headache, flushing, upset stomach, stuffy nose and changes in color vision.
- Never take it with nitrates or riociguat: the combination can drop blood pressure dangerously.
- Get emergency care for an erection lasting more than 4 hours, sudden vision loss or sudden hearing loss.
- A heavy, high-fat meal can delay how fast it works.
Prescription only. A licensed provider reviews your health history in an online visit and decides whether this program is appropriate for you. Tell your provider about every medication, supplement, allergy and condition, and whether you are pregnant, trying to conceive or breastfeeding. If you have a severe reaction, trouble breathing, chest pain or swelling of the face or throat, call 911.
Full details: safety information. Updated October 28, 2026.
Is sildenafil the same as Viagra?
Yes. Sildenafil is the active ingredient in Viagra, which is FDA-approved for erectile dysfunction, and generic sildenafil must meet FDA standards. RULE Longevity offers sildenafil tablets for as-needed use at $129 per month.
Should I choose sildenafil or tadalafil?
It depends on your routine and health history, and your provider helps you decide. Sildenafil is shorter acting and taken as needed, while tadalafil lasts longer and can be prescribed daily or as needed. Both are generics of FDA-approved drugs.
Can I drink alcohol with sildenafil?
Heavy drinking can make sildenafil less effective and can add to dizziness or low blood pressure. Keep alcohol light and ask your provider what is safe for you. Never take sildenafil with nitrates.
Can I get sildenafil online without an in-person visit?
Yes. You can complete a secure online visit, and a licensed provider decides whether sildenafil is appropriate for you. If it is, it ships in discreet packaging with shipping included.
Read more
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Ready to start?
A licensed provider reviews your online visit and decides whether Sildenafil is right for you.