Sildenafil film vs tablets: what’s different, and what isn’t
A film dissolves under your tongue with no water. It isn’t faster than a tablet, and the same side effects and safety rules apply.
In short
- Sildenafil is FDA-approved for erectile dysfunction as tablets and, since 2026, as a film, but StackRx’s Sildenafil Film is a compounded 50 mg film that isn’t FDA-approved.
- In studies of commercially made films, sildenafil reached the blood on the same schedule as tablets or a little later, so a film isn’t faster.
- You take it about 1 hour before sex, no more than one film a day, and it has an effect only when you’re aroused.
- Never take it with nitrates, poppers, riociguat or vericiguat, and a provider reviews your medicines before deciding whether it’s right for you.
What sildenafil does
Sildenafil has been prescribed for erectile dysfunction (ED) since 1998. It belongs to a group of medicines called PDE5 inhibitors.
When you’re aroused, nerves in the penis release nitric oxide. That makes a messenger called cGMP, which relaxes the artery walls so blood can flow in. An enzyme called PDE5 breaks cGMP down, and the erection fades. With ED, that signal can fade before the erection is firm enough or lasts long enough.
Sildenafil blocks PDE5, so cGMP lasts longer while you’re aroused. It doesn’t cause an erection on its own. After sex, or when arousal passes, the erection goes down as usual.
Film and tablets side by side
Tablets and films both contain sildenafil. What differs is how you take them, how much they’ve been tested and how they’re regulated.
| At a glance | Approved tablets | Approved film | Sildenafil Film (compounded) |
|---|---|---|---|
| How you take it | Swallowed | Dissolves on the tongue | Dissolves under the tongue |
| FDA-approved for ED | Yes | Yes, since February 2026 | No |
| Strengths | 25, 50 or 100 mg | 25, 50, 75 or 100 mg | 50 mg only |
| Tested in trials | 21 trials, more than 3,000 men | 1 trial, 475 men | None |
| Blood levels peak | About 60 minutes (median) | About 80 minutes (median) | Not measured |
Sildenafil Film is compounded: a licensed pharmacy prepares it for you. The FDA doesn’t review compounded medicines for safety, effectiveness or quality. It isn’t either of the FDA-approved products, and it hasn’t been compared with them in a trial. If an approved form suits you better, your provider can talk it through. For more, read compounded vs FDA-approved medicines.
How to take the film, and when
- Tear open a sachet with dry hands.
- Place the film under your tongue and let it dissolve completely. No water is needed.
- Take it about 1 hour before sex. The window runs from about 30 minutes to 4 hours after you take it.
- Take no more than one film a day.
Food matters. In studies of tablets, a heavy, fatty meal made blood levels peak about an hour later and about 30% lower. In a 2025 report on films taken after a meal, with groups of 45 and 35 men, films peaked 1 to 1.5 hours later than tablets and 13 to 17% lower, with the same total amount in the blood. So take it on an empty stomach or after a light meal.
Under or on the tongue? The approved film goes on the tongue. In a study of 12 men, placing a film under the tongue or on top made little difference to blood levels. Follow your provider’s directions.
Give it a fair try. The 4-hour window isn’t a 4-hour erection. Erections still come with arousal and go down after sex. Give it 6 to 8 tries, taken about an hour ahead without a heavy meal. If it still isn’t helping, your provider can talk through other options.
What the research shows, and where it stops
Tablets. Sildenafil tablets were tested in 21 placebo-controlled trials of more than 3,000 men, lasting up to 6 months. In four fixed-dose trials, 74% of men taking 50 mg said their erections improved, against 24% on a placebo.
The approved film. A sildenafil film that dissolves on the tongue was tested in a 12-week trial of 475 men. On the film, erections lasted long enough for sex in 70% of attempts, up from 12% at the start. On a placebo, that rose from 9% to 50%. About 6 in 10 men on the film ended on 75 or 100 mg, a higher dose than the 50 mg compounded film.
Blood levels. In studies of commercially made films, as much sildenafil reached the blood as with tablets, peaking at the same time or a little later. In one, with 53 men, a 100 mg film put as much sildenafil into the blood as a 100 mg tablet.
Where it stops. This compounded film hasn’t been tested in any trial, including how much sildenafil it delivers. No controlled trial has shown that films act faster or help more than tablets. In one open-label study of 139 men, tablets scored higher for erectile function than films, though it compared a 75 mg film with a 100 mg tablet. So the evidence is for sildenafil itself, not for this particular film.
Side effects
The same side effects apply to films and tablets. The most common are headache, flushing, indigestion, a stuffy nose and dizziness. In trials of sildenafil taken as needed, about 1 in 6 men had a headache (1 in 25 on a placebo) and 1 in 10 had flushing (1 in 100 on a placebo).
Some men briefly see a blue tinge, blurred vision or more sensitivity to light. Back or muscle aches, nausea and a rash are less common. Most side effects pass within hours.
Stop and get care right away for any of these:
- an erection that lasts more than 4 hours
- sudden loss of vision in one or both eyes
- sudden hearing loss or ringing in the ears
- chest pain or fainting
- swelling of the lips, face or throat
Safety and who shouldn’t use it
The nitrate rule
Never take sildenafil with nitrate heart medicines, such as nitroglycerin tablets, spray or patches, or isosorbide. The same goes for poppers (amyl or butyl nitrite), riociguat (Adempas) and vericiguat. Taken with sildenafil, any of these can drop your blood pressure to a dangerous level. If you need emergency care for chest pain after taking a film, tell the staff you’ve taken sildenafil and when.
Other medicines and alcohol
- Other ED or pulmonary hypertension medicines. Don’t combine it with tadalafil, vardenafil, avanafil or other sildenafil, including Revatio.
- Ritonavir, including Paxlovid for COVID. A 50 mg film is more than the recommended dose, so check with your provider first.
- Alpha-blockers such as tamsulosin, doxazosin, terazosin or alfuzosin. Together with sildenafil, they can make you dizzy or faint.
- Blood pressure medicines. Sildenafil lowers blood pressure a little on its own, and the effects add up.
- Some antifungal and antibiotic pills, such as ketoconazole, itraconazole and clarithromycin. They can raise sildenafil levels sharply.
- Alcohol. Keep it to a drink or two. More makes erections harder to get and adds to dizziness.
Several of these may call for a lower dose than the film’s 50 mg, or a different option, so your provider needs your full medicine list.
Your heart and other health
Don’t use it if a doctor has told you your heart isn’t healthy enough for sex. Tell your provider about a heart attack, stroke or serious heart rhythm problem in the last 6 months, or chest pain during sex. If you’re over 65 or have liver or kidney problems, the usual starting dose is lower, 25 mg, so your provider will decide whether a 50 mg film is right for you.
ED can be an early sign of heart disease or diabetes, so tell your provider if it’s new or getting worse. Sildenafil doesn’t protect against sexually transmitted infections, including HIV.
Sildenafil Film is for adult men with ED. StackRx visits aren’t open yet. When they open, a US-licensed provider will review your health and medicines and prescribe it only if it’s right for you. See all sexual health treatments.
Sources
- Viagra (sildenafil citrate) prescribing information, Pfizer, DailyMed 2026 (21 placebo-controlled trials, more than 3,000 men; 74% vs 24% on 50 mg in 4 fixed-dose trials, 1,797 men; side-effect rates; peak at a median of 60 minutes; effect of a high-fat meal), DailyMed
- Vybrique (sildenafil) oral film prescribing information, IBSA, DailyMed 2026 (FDA-approved February 5, 2026; one 12-week trial, 354 men on film vs 121 on placebo; peak at a median of 80 minutes)
- Radicioni 2017, Drug Des Devel Ther (53 men; 100 mg film vs 100 mg tablet), PubMed 28442892
- Loprete 2018, Clin Drug Investig (12 men; 50 mg film under vs on the tongue), PubMed 29909432
- Pham 2025, Sex Med (45 and 35 men; films vs tablets after a meal), PubMed 41287751
- Cocci 2017, J Sex Med (139 men, open-label; 75 mg film vs 100 mg tablet), PubMed 29153580
This article is general information, not medical advice. Only a US-licensed provider who reviews your health can say whether a treatment is right for you. If you have a medical emergency, call 911.
