# Avanafil vs Sildenafil: Speed Against Price

> Avanafil works in half the time and causes fewer side effects. Sildenafil costs a fraction as much. That is genuinely the whole comparison.

- **Source:** ED Treatment Guides (https://www.edtreatmentguides.com/compare/avanafil-vs-sildenafil)
- **Last updated:** 2025-11-18
- **Type:** comparison
- **Compares:** Avanafil (Stendra) vs Sildenafil (Viagra)

## Key points

- Effectiveness is comparable. Avanafil is not a stronger drug.
- Avanafil is the most PDE5-selective of the class, which is why it causes fewer visual side effects and less muscle ache.
- Its onset — as little as 15 minutes — is the fastest available.
- Sildenafil is dramatically cheaper and stocked everywhere.
- Tolerability, not potency, is the reason to switch.

## Avanafil (Stendra) vs Sildenafil (Viagra)

|  | Avanafil (Stendra) | Sildenafil (Viagra) |
| --- | --- | --- |
| Onset | 15–30 minutes | 30–60 minutes |
| Useful window | About 6 hours | 4–6 hours |
| Effect of food | Modest | Significant — fatty meals delay it |
| Visual side effects | Rare (highly PDE6-selective) | About 1 in 30 |
| Headache rate | Lower | About 1 in 6 |
| Effectiveness | Comparable | Comparable |
| Typical monthly cost | $30–$100+ | $5–$40 |
| Availability | Patchier | Universal |

## Verdict

Start with sildenafil. It costs a fraction as much, it is available everywhere, and it works just as well. Move to avanafil for one of two specific reasons: you need the shortest possible gap between taking a tablet and having sex, or sildenafil's side effects — particularly headache or visual disturbance — made it unpleasant enough that you stopped. At that point paying more for a drug you can actually tolerate is good value, not extravagance.

## Why avanafil causes fewer side effects

PDE5 inhibitors block other phosphodiesterase enzymes to varying degrees, and that cross-reactivity is where the characteristic side effects come from. Sildenafil has some activity at PDE6 in the retina — hence the blue tinge and light sensitivity. Avanafil was designed later, with far greater selectivity for PDE5.

The result is a cleaner side-effect profile: less headache, essentially no visual disturbance, and less muscle ache than tadalafil. If side effects were what made you stop taking sildenafil, this is a real and predictable difference rather than a marketing claim.

## When 15 minutes actually matters

For planned sex, the difference between 20 minutes and 50 minutes is largely academic. It becomes meaningful in specific situations:

- Where a long lead time itself creates anticipatory anxiety — watching the clock is its own problem.
- Where sex tends to arise without planning and taking a tablet an hour ahead is not realistic.
- Where you routinely eat a substantial meal beforehand, since avanafil is much less affected by food.
- Where a partner is uncomfortable with the obvious ritual of planning around a tablet.

> **The alternative solution to the same problem**
>
> If planning is the difficulty rather than side effects, [daily low-dose tadalafil](https://www.edtreatmentguides.com/compare/daily-vs-on-demand) removes the timing question entirely and costs far less than avanafil. Worth considering before paying a premium for speed.

## The cost gap

This is what decides it for most men. Generic sildenafil has had years of price erosion; avanafil has had far less generic competition, and it shows. Depending on where you buy, the difference can be severalfold per dose.

Run your own numbers based on how often you would use it — a few doses a month changes the arithmetic considerably compared with several a week. Our [cost calculator](https://www.edtreatmentguides.com/tools/cost-calculator) does this directly.

## Frequently asked questions

### Is avanafil stronger than sildenafil?

No. Effectiveness is comparable. Its advantages are faster onset and fewer side effects.

### Why is avanafil so much more expensive?

It is the newest drug in the class and has had limited generic competition. Sildenafil has had years of price erosion that avanafil has not.

### Should I switch if sildenafil gives me headaches?

It is a reasonable next step, though trying a lower sildenafil dose first is cheaper and sometimes sufficient. Avanafil is generally the best tolerated of the class.

### Can I take avanafil with food?

Yes. Food has less effect on avanafil than on sildenafil, though a very heavy meal will still slow it somewhat.

## Sources

- U.S. Food and Drug Administration. [Drugs@FDA — approved drug products and prescribing information](https://www.accessdata.fda.gov/scripts/cder/daf/)
- American Urological Association. [Erectile Dysfunction: AUA Guideline](https://www.auanet.org/guidelines-and-quality/guidelines/erectile-dysfunction-(ed)-guideline) (2018)
- MedlinePlus (National Library of Medicine). [Drugs, Herbs and Supplements](https://medlineplus.gov/druginformation.html)

## Related pages

- [Avanafil (Stendra): The Fastest-Acting ED Tablet](https://www.edtreatmentguides.com/treatments/avanafil)
- [Sildenafil (Viagra): How It Works, Dosing, Cost and Side Effects](https://www.edtreatmentguides.com/treatments/sildenafil)
- [ED Medication Side Effects, Explained and Managed](https://www.edtreatmentguides.com/guides/side-effects)
- [Daily vs On-Demand Tadalafil: Which Regimen Fits Your Life?](https://www.edtreatmentguides.com/compare/daily-vs-on-demand)

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_This page is general health information, not medical advice. It cannot account for your own history, medications or risk factors. Talk to a licensed clinician before starting, stopping or changing any treatment._

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