Sildenafil (Viagra)
Sildenafil is the original ED pill and is now inexpensive as a generic. It works for about 4–6 hours.
Medically reviewed by Kayla Papez, NP· Updated October 6, 2026
- Brands
- Viagra, generic
- How it's taken
- Tablet
- How often
- As needed, about an hour before sex
- FDA status
- FDA-approved for erectile dysfunction
How it works
Like tadalafil, it improves blood flow when you're aroused. It works best on an empty stomach.
A good fit for
- Men who prefer a shorter-acting, low-cost option
Things to know
- Never combine with nitrates
- Heavy meals delay it
- Headache, flushing, vision tint
FAQ
Sildenafil questions
Why didn't it work the first time?
Timing, a heavy meal, alcohol or nerves are common causes. Try it a few times as directed; if it still doesn't work we'll adjust the dose or medication.
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Other sexual health options
Pricing
All-in memberships
Foundation
Testosterone care with everything included.
$179/month
Veterans & first responders: $159/month
- Testosterone therapy (injection, oral or topical, FDA-approved)
- Quarterly labs, including PSA and hematocrit
- Annual heart & metabolic panel (lipids, A1c, ApoB)
- The same named clinician every visit
- Unlimited video follow-ups and text check-ins
- Supplies and shipping included
Performance
Most popularHormones plus the next problem solved.
$249/month
Veterans & first responders: $229/month
- Everything in Foundation
- One add-on included: ED, hair loss or fertility-preserving care
- Body-composition scan twice a year
- Quarterly coaching on training, sleep and nutrition
- 20% off Strata Skin + Lab
Executive
Priority care for men who can't wait.
$349/month
Veterans & first responders: $329/month
- Everything in Performance
- Same-day and after-hours priority visits
- Advanced annual panel and results review
- Monthly Strata Base Routine refill
- $50 monthly aesthetics credit for men (Botox, skin)
Find out in 15 minutes.
Free consult and same-day testosterone and PSA results in Holladay, Utah.