Priligy (dapoxetine): How it works and what to expect

Premature ejaculation is one of the most common sexual complaints men bring to a prescriber, and it's also one of the most under-discussed ones.

But there’s a medicine for it. It’s called Priligy.

This article won't tell you whether Priligy is right for you. That's a conversation for a GMC-registered prescriber, who'll ask about your medical history before deciding what's suitable.

This page sets out what the medicine does, what the trial evidence shows (including the parts that don't sound as impressive as the marketing), and the safety points that actually matter.

Before you begin: A little bit about OnlineClinic

OnlineClinic has been operating since 2011 and has treated more than 2.1 million patients.

The pharmacy is registered with the General Pharmaceutical Council (GPhC), our prescribers are registered with the General Medical Council (GMC), and the service is regulated by the Care Quality Commission (CQC).

As of October 2026, on Trustpilot, the service rating is 4.6 out of 5 based on 7,011 reviews.

You may see this medicine sold as "Priligy" in some places and "dapoxetine" in others.

They're the same active ingredient.

Generic dapoxetine tablets were licensed for UK use by the MHRA in March 2023, and they work identically to the branded version because they're required to match it for absorption and effect.

If you're prescribed dapoxetine rather than Priligy, nothing about the dose, timing, or safety advice in this article changes.

Dapoxetine belongs to a class of medicines called SSRIs, the same broad family as some antidepressants.

But it isn't used the same way, and it isn't treating depression.

It's being used here for a specific, well-documented side effect that SSRIs are known to cause: A delay in ejaculation.

Ejaculation is triggered by a reflex, run mainly through your nervous system, with the brain playing a supporting role.

Serotonin is one of the chemical messengers involved.

Normally, nerve cells release serotonin, then quickly reabsorb it.

Dapoxetine slows down that reabsorption, so serotonin stays active in the relevant nerve pathways for a little longer.

That extra activity is what delays ejaculation.

Here's the important difference from other SSRIs. Antidepressant SSRIs like fluoxetine or sertraline are taken every day. They build up in the body slowly over weeks, and take just as long to wear off if you stop.

Dapoxetine is built to do the opposite: It reaches its highest level in the blood within about 1 to 2 hours of taking it, then clears from your system quickly, mostly gone within a day.

That's why it can be taken only when you need it, rather than every day.

The most reliable evidence comes from a pooled analysis of five phase III trials in more than 25 countries, involving 6,081 men in total.

The headline figures below come from four of those five trials, around 4,800 men; the fifth trial compared daily dosing against on-demand dosing and mainly adds to the safety picture rather than these numbers.

This pooled analysis forms the basis of NICE's evidence summary on dapoxetine.

Starting from an average of around 0.9 minutes, here's what changed at 12 weeks:

Placebo 30mg 60mg 1.9 3.1 3.6 11% 26% 30% 14% 31% 38% Time to ejaculation (min) Rated control good/very good (%) Rated PE better/much better (%) Each group is scaled to its own highest value, not a shared axis, so bar heights show the size of the improvement within each measure, not between them.

That's a real, statistically significant effect.

These averages are pulled upward by a minority of men who respond strongly.

In a 24-week trial of 618 men, the average (mean) time to ejaculation rose from 1.9 minutes on placebo to 3.2 and 3.5 minutes on the 30mg and 60mg doses respectively.

The most recent research, published in 2025, found that combining dapoxetine with behavioural techniques (the kind a sex therapist or your prescriber might suggest, like the "stop-start" or "squeeze" methods) worked better than the tablet alone.

So, what should you actually expect?

Timing and method

Finding the right dose

Nausea, dizziness, and headache are common side effects of taking Priligy (dapoxetine).

If you take dapoxetine, there's a reasonable chance you'll notice at least one of these, especially the first few times.

Very common (more than 1 in 10 people)

Common (up to 1 in 10 people)

One serious side effect worth mentioning: Fainting

This is the side effect that makes dapoxetine different from most other tablets you might have taken before, and it's worth understanding rather than being caught off guard by it.

A small number of men experience a sudden drop in blood pressure after taking dapoxetine, which can cause light-headedness or, rarely, fainting.

0.05% 0.06% 0.23% Placebo 30mg 60mg Same figures as the table above, sized so the jump at 60mg is visible at a glance.

Most cases happened in the first three hours after a dose, often the very first one, or during a clinic visit involving a blood test or a change in position.

What to do about it:

This isn't meant to alarm you.

It's a real but manageable risk, and it's exactly the sort of thing your prescriber checks for before prescribing, including asking about your blood pressure and any history of fainting.

Dapoxetine isn't suitable for everyone, and some of these conditions rule it out completely.

Not suitable if you have:

Won't be prescribed alongside:

There's a waiting period in both directions, though the length differs.

If you've taken one of the medications above in the last 14 days, dapoxetine won't be started.

Going the other way, most prescribers recommend waiting at least 7 days after stopping dapoxetine before starting a new SSRI, SNRI, or similar medication.

Needs a careful discussion first:

Dapoxetine also isn't licensed for men under 18, or aged 65 and over, and it isn't prescribed to delay ejaculation in men who haven't been diagnosed with premature ejaculation.

It's also worth knowing that grapefruit juice affects the same liver enzyme as several of the contraindicated medications above, so it's best avoided for a day before and after taking a dose.

Your prescriber will ask about all of this during your consultation, so there's no need to work it all out yourself in advance.

This comes up a lot, understandably, because premature ejaculation and erectile difficulties sometimes overlap, and it's a fair question to ask before your consultation.

Dapoxetine should not be used by men taking PDE5 inhibitors (sildenafil, tadalafil, vardenafil, and similar medicines) for erectile dysfunction.

The safety and efficacy of the combination haven't been formally established, and using them together may add to the dizziness and fainting risk covered above.

That's the standard, cautious UK position, and it's the one OnlineClinic's prescribers follow.

It's worth knowing what the research on this actually tested. One clinical trial added dapoxetine for men whose erectile dysfunction was already well controlled on a stable PDE5 inhibitor, and found it improved ejaculation time on top of that.

This doesn't change the official advice above: The trial tested adding dapoxetine to an existing, stabilised ED treatment under close research supervision, not whether starting both together is generally safe, and the product information still says the combination shouldn't be used outside that kind of prescriber oversight.

If you have both premature ejaculation and difficulty getting or keeping an erection, tell your prescriber both, honestly, so they can advise on the safest route for you specifically.

Our Priligy 30mg and 60mg prices are as follows:

Every price includes the prescription, the consultation, discreet packaging, and next-day delivery. There are no hidden fees.

We confirm 60mg pricing during your consultation, since not everyone needs to start there.

Our process is straightforward. From start to finish, this is what happens when you order with us:

Every price includes the prescription, the consultation, the packaging, and delivery. There are no hidden fees.