Sildenafil
Good for: Those with erectile dysfunction looking for a well-established treatment option with a shorter duration of action.
Sildenafil is the original PDE5 inhibitor, approved by the FDA for erectile dysfunction. It works by increasing blood flow to the penis during sexual stimulation, producing more reliable and sustained erections. It has a well-established efficacy and safety profile built on over 25 years of clinical use.
Sildenafil selectively inhibits PDE5, the enzyme responsible for degrading cGMP in penile smooth muscle. Sexual stimulation causes nitric oxide release, which raises cGMP levels. Sildenafil prevents their breakdown, sustaining vasodilation and enabling erection. Effects typically begin within 30 to 60 minutes and last 4 to 6 hours, with peak activity around 60 minutes post-dose.
Every batch of compounded medication is third-party tested before it ships. All testing follows USP 797 and the relevant USP chapter for each test. Your provider continues to monitor your treatment, so quality doesn't stop at the pharmacy door.
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How sildenafil works
Sildenafil inhibits PDE5, an enzyme that restricts blood flow to erectile tissue. Blocking it allows blood vessels in the area to relax and fill in response to sexual stimulation, and it doesn't produce an erection without arousal. It's been in clinical use since 1998 and has one of the largest real-world evidence bases of any medication in its class.
What to expect on sildenafil
Most patients see meaningful improvement with the first or second use. Take it 30 to 60 minutes before activity on a relatively empty stomach, since high-fat meals can delay absorption by an hour or more. Your provider determines your starting dose and can adjust upward based on how you respond, and common side effects include headache, flushing, and nasal congestion.
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Common questions
Sildenafil is safe for most patients when used as prescribed and is contraindicated with nitrate medications due to the risk of severe hypotension. It should be used with caution in those with significant cardiovascular conditions, low blood pressure, or those on alpha-blockers. Your Haven provider reviews your health history and full medication list before prescribing to confirm it is appropriate for you.
Take sildenafil 30 to 60 minutes before sexual activity, on an empty or lightly fed stomach. High-fat meals can delay absorption by an hour or more. The medication requires sexual stimulation to work; it does not produce an erection in the absence of arousal. Your provider specifies your starting dose and may adjust based on your response.
Most patients experience a meaningful improvement in erectile function with the first or second use. The effect window is approximately 4 to 6 hours. For optimal results, consistent timing, avoiding heavy meals beforehand, and allowing time for the medication to absorb fully all matter. Your provider may adjust your dose upward if the initial dose is effective but not fully satisfying.
The most common side effects are headache, facial flushing, nasal congestion, and mild indigestion. Vision changes, including a blue tint to vision or increased light sensitivity, are occasionally reported and relate to sildenafil's mild inhibition of PDE6 in the retina. These are transient and dose-dependent. Sudden vision or hearing loss is rare but requires immediate medical attention.
Sildenafil is one of the most studied medications in the world, with clinical trial data going back to the late 1990s and an enormous real-world evidence base accumulated over 25-plus years. Landmark trials established its efficacy across a wide range of patients with erectile dysfunction regardless of underlying cause. It remains a first-line recommended treatment in major urology and sexual medicine guidelines globally.
Sources:
- DailyMed. Sildenafil citrate tablet, film coated: prescribing information. National Library of Medicine.
- The Effect of Phosphodiesterase-type 5 Inhibitors on Erectile Function: An Overview of Systematic Reviews. DOI: 10.3389/fphar.2021.735708
