Last reviewed: September 2026
Clinical Overview
Male sexual confidence is rarely determined by one factor. Erection reliability, ejaculation control, libido, anxiety and perception of penile size can all interact. Tadalafil, dapoxetine, selected off-label medicines such as duloxetine, testosterone replacement when medically indicated, and penis filler each target a different part of that physiology rather than providing one universal solution.
The direct answer
Good sexual function is not simply about obtaining an erection. A man can have excellent penile blood flow but struggle with premature ejaculation. Another may have good ejaculation control but lose erections because of performance anxiety. A third may have normal erectile physiology yet remain intensely self-conscious about penile girth or his appearance during foreplay.
The useful question is therefore not, "What is the best sexual-performance treatment?" It is: what part of sexual function is actually limiting this man?
Treatment comparison at a glance
| Treatment | Main clinical target | What it does not primarily treat |
|---|---|---|
| Tadalafil | Erection reliability and erectile dysfunction | Penile size or libido. Does not reliably or instantly enlarge the penis structure the way penis filler does — though it can help ensure the penile blood-filling chambers are close to 100% full, creating stiff, firm tumescence. |
| Dapoxetine | On-demand treatment of premature ejaculation | Erectile dysfunction or penile size (not directly ED, though it may help indirectly). |
| Duloxetine | Selected off-label continuous treatment of PE | Penile size; may itself impair sexual function. |
| TRT | Testosterone deficiency with appropriate symptoms | PE or normal testosterone levels. |
| Penis filler | Penis girth, flaccid length and aesthetic confidence | Vascular erectile dysfunction. |
These treatments should not be viewed as a pre-designed drug stack. Each requires its own indication, contraindication assessment and clinical reasoning. You will see online and in forums that many are branding this as the "pornstar stack" — the ultimate combination of size increase (penis filler), blood flow (tadalafil), lasting longer (dapoxetine/duloxetine) and libido/drive (TRT). As licensed medical professionals, we do not agree with such marketing and this trivialised approach to medication. Every one of these treatments carries its own risks and therefore needs a medical doctor to prescribe and assess suitability for that individual.
Dapoxetine: The Main Oral Medication for Premature Ejaculation
Dapoxetine is a short-acting selective serotonin reuptake inhibitor specifically developed for on-demand treatment of premature ejaculation. It is licensed in the UK for appropriately diagnosed PE, whereas most longer-acting antidepressants used to delay ejaculation are used off-label. The European Association of Urology also places dapoxetine alongside lidocaine/prilocaine spray as a first-line pharmacological treatment for lifelong PE.
How does dapoxetine delay ejaculation?
Ejaculation is a neurological reflex involving the brain, spinal cord, sympathetic nervous system and genital sensory pathways. Serotonin has an important inhibitory effect on this reflex. Dapoxetine temporarily blocks neuronal serotonin reuptake, increasing serotonergic signalling around the neural pathways involved in ejaculation. In practical terms, this can raise the threshold at which ejaculation is triggered.
The aim is not simply to make intercourse last longer. Successful treatment should ideally improve: ejaculatory control → less urgency → less anticipatory anxiety → greater confidence → better sexual satisfaction.
In an integrated analysis of five phase III trials involving more than 6,000 men, dapoxetine improved intravaginal ejaculatory latency time, perceived ejaculation control, sexual satisfaction and PE-related distress compared with placebo. Mean IELT increased from approximately 0.9 minutes at baseline to 3.1 minutes with 30 mg and 3.6 minutes with 60 mg at 12 weeks, compared with 1.9 minutes with placebo.
How is dapoxetine taken?
Dapoxetine is an on-demand medication, rather than a conventional daily SSRI. The usual licensed starting dose is 30 mg approximately one to three hours before anticipated sexual activity. Treatment should not begin with 60 mg. Higher dosing may be considered by the prescriber where the initial response is inadequate and the medicine is tolerated.
It should not be taken more than once within 24 hours, and current UK patient information specifically describes it as an on-demand medicine rather than something to take routinely every day. This short duration is important: a man can obtain a temporary serotonergic effect around sexual activity without maintaining the continuous exposure associated with conventional antidepressants.
What are the disadvantages of dapoxetine?
The most common adverse effects are nausea, dizziness and headache. Diarrhoea, insomnia and fatigue can also occur. Orthostatic hypotension and fainting are recognised risks, which is why appropriate screening, hydration advice and medication-interaction assessment matter.
Dapoxetine therefore works particularly well conceptually for the man who says: "My erections are fine. I simply reach the point of no return far too quickly."
Duloxetine: A Different Approach to Premature Ejaculation
Duloxetine's position in the pathway is different from dapoxetine's. It is a serotonin-noradrenaline reuptake inhibitor, or SNRI. Unlike dapoxetine, duloxetine is not licensed in the UK for premature ejaculation. When used for PE it is therefore an off-label treatment.
A prospective randomised placebo-controlled crossover trial published in 2023 investigated 30 mg duloxetine taken daily and found significant improvements in IELT, PE scores and sexual quality-of-life measures compared with placebo. The authors also emphasised that larger comparative studies are required.
The practical distinction is important:
- Dapoxetine provides an on-demand serotonergic effect around sex.
- Duloxetine provides continuous background serotonergic and noradrenergic activity.
For selected men with very frequent sexual activity, or where a clinician considers a continuous treatment strategy appropriate, this may be useful. However, the trade-off is greater continuous exposure. Duloxetine can cause nausea, sweating, sleep disturbance, dizziness and gastrointestinal symptoms. More importantly for sexual medicine, it can cause reduced libido, erectile difficulty, markedly delayed ejaculation or inability to orgasm.
That last effect illustrates the problem with simply trying to delay ejaculation as much as possible. The objective in treating PE is not: "Make ejaculation impossible." It is: "Give the man control over when ejaculation occurs while preserving desire, erection and orgasm." For most appropriate UK patients seeking an oral medicine specifically for PE, that is why dapoxetine deserves to sit ahead of duloxetine in the pathway.
Tadalafil: Improving Erection Reliability Rather Than Desire
Tadalafil works on an entirely different part of sexual physiology. Sexual stimulation releases nitric oxide within penile tissue. This increases cyclic guanosine monophosphate, or cGMP, which relaxes smooth muscle and allows greater arterial inflow into the corpora cavernosa. PDE5 breaks cGMP down. Tadalafil inhibits PDE5 and therefore allows the erection pathway to work more effectively when sexual stimulation occurs. It does not manufacture sexual desire and it does not directly enlarge the penis.
What tadalafil can provide is erection reliability. For some men this has a substantial psychological consequence. Instead of continuously thinking "Will I stay hard?", the erection becomes less of a conscious task. That reduction in self-monitoring can itself reduce performance anxiety.
EAU guidance includes tadalafil both as an on-demand treatment and at 5 mg once daily for suitable men with erectile dysfunction. Organic nitrates remain contraindicated because of the potential for significant hypotension.
Where PE and erectile problems coexist, both problems need to be identified rather than assuming that treating ejaculation alone will fix the sexual experience.
TRT: Restoring the Hormonal Foundation When Testosterone Is Genuinely Low
Testosterone influences libido, sexual thoughts, energy, mood, spontaneous erections and aspects of erectile physiology. But TRT is not a general-purpose sexual-performance enhancer.
Testosterone replacement should be considered where a man has appropriate symptoms together with confirmed biochemical testosterone deficiency, followed by proper investigation and monitoring.[5] In a genuinely hypogonadal man, correcting testosterone deficiency may improve libido and aspects of sexual function. In a man whose testosterone is already normal, simply increasing testosterone further is not an evidence-based treatment for premature ejaculation or performance anxiety.
TRT also requires consideration of haematocrit, cardiovascular health, prostate monitoring where appropriate, and fertility. Exogenous testosterone can suppress the hypothalamic-pituitary-testicular axis and reduce sperm production.
The principle is therefore straightforward: replace deficiency — do not diagnose every sexual problem as low testosterone.
Penis Filler: Anatomy, Confidence and the Psychology of Sexual Performance
Medication cannot address every component of male sexual confidence. Some men have normal erections, normal testosterone and reasonable ejaculation control but remain persistently self-conscious about penis size. This is where penis filler occupies a completely different category.
Penis fillers are used to increase the soft-tissue circumference surrounding the erectile bodies. They do not directly improve the vascular mechanism responsible for an erection. However, penis size can influence sexual psychology. Randomised studies of temporary hyaluronic acid and polylactic acid fillers have demonstrated measurable increases in girth together with improvements in penis size satisfaction and some sexual-life satisfaction measures.[6] That does not mean larger automatically equals better sex — it means body perception can form one component of sexual confidence.
Aiva Wellness technique: penis enlargement through a single-entry approach
Aiva Wellness has also contributed directly to the published literature surrounding non-surgical penis enlargement. A 2025 peer-reviewed case report by Chaudhry and Chaudhry described a single-entry cannula approach for penis filler placement within the superficial penile soft-tissue plane. The technique was designed around controlled filler distribution while minimising entry points.
Importantly, this publication is a case report. It demonstrates a clinical technique and an individual outcome; it does not establish universal efficacy or prove that complications cannot occur. Clinical experience, anatomical technique and published research are useful, but patients should still be counselled that penis filler carries risks including swelling, bruising, asymmetry, nodules, migration, infection and other complications.
The 2024 SMSNA position statement concluded that temporary HA and PLA fillers may provide penis girth enlargement with a moderate safety profile based on the available evidence, while also emphasising that the overall evidence base remains limited.
Penis filler before and after: what should actually change?
A properly presented penis filler before and after comparison should not rely on different angles, lighting or erection states. The meaningful anatomical outcome is primarily increased circumference and longer flaccid length. Penis filler may create: greater flaccid girth, a fuller dependent appearance, increased erect circumference and a different visual proportion of the shaft. It should not be sold as a reliable method of increasing erect penile length — there is no procedure in the world that can safely increase erect length.
In a multicentre randomised trial, mean girth remained significantly above baseline at 48 weeks following both HA and PLA treatment. Another trial reported mean increases at 24 weeks of approximately 2.1 cm with HA and 1.6 cm with PLA. Individual outcomes vary according to baseline anatomy, product characteristics, volume, technique and biological response.
Foreplay, Flaccid Confidence and the Part Men Rarely Talk About
Much of male sexual medicine focuses on penetration. But anxiety often starts considerably earlier. For a man who is highly self-conscious about his penis, being seen naked while flaccid can trigger the same sympathetic stress response that later interferes with erections. He starts observing himself rather than experiencing what is happening.
A fuller flaccid appearance following penis filler may therefore have psychological value for some men even before an erection occurs. This is an important distinction: penis filler does not improve penile arterial blood flow, but feeling less self-conscious about the penis may reduce one source of performance anxiety. That psychological effect cannot be guaranteed and should never be presented as treatment for erectile dysfunction.
Sexual Confidence Is Often the Interaction Between Several Systems
At Aiva Wellness, it is useful to separate male sexual function into distinct domains: erection quality, ejaculation control, sexual desire, penile self-perception and psychological confidence. A man can be strong in four of them and still feel sexually dysfunctional because the fifth is repeatedly interfering with sex. This is why a proper assessment matters.
Tadalafil may help the man worrying about maintaining an erection. Dapoxetine may help the man whose ejaculation reflex consistently occurs before he wants it to. Duloxetine may occasionally provide a continuous off-label approach where clinically appropriate, but with a different adverse-effect burden. TRT may transform sexual wellbeing in a genuinely testosterone-deficient man while providing little rational benefit to someone whose hormones are already normal. And penis filler may address an anatomical concern that medication cannot.
None is universally "best." The right treatment depends on identifying the actual bottleneck.
Knowing You Can Pleasure Your Partner
Sexual confidence also develops when a man feels that he has options. Reliable erections may make him less afraid of losing rigidity. Better ejaculation control may remove the feeling that penetration has to be rushed. Improved body confidence may make him more comfortable during foreplay and intimacy.
But partner pleasure should never be reduced to penile size or intercourse duration. Arousal, communication, stimulation, emotional connection and sexual technique remain central. Medical treatment can remove obstacles — it cannot manufacture intimacy.
Evidence and Safety
Dapoxetine is the principal licensed oral PE medicine discussed here and should be prescribed only after an appropriate PE assessment. Duloxetine use for PE remains off-label despite emerging clinical evidence. Tadalafil should only be supplied following cardiovascular and medication screening, particularly for nitrate use. TRT requires symptoms, biochemical confirmation of testosterone deficiency and appropriate monitoring.[5] Penis filler remains an elective cosmetic intervention. Temporary HA and PLA fillers have an emerging evidence base, but published evidence remains considerably smaller than that available for licensed pharmaceutical treatments.
These therapies should therefore not be automatically combined simply because they address different components of sexual function.
Frequently Asked Questions
What is the main medication for premature ejaculation?
For an oral medication in the UK, dapoxetine is the principal licensed treatment specifically for premature ejaculation. It is taken on demand before anticipated sexual activity rather than as a routine daily medicine.
How quickly does dapoxetine work?
Dapoxetine reaches peak plasma concentrations rapidly and is normally taken approximately one to three hours before sex. Its short pharmacokinetic profile is what makes it suitable for on-demand treatment.
Can dapoxetine be taken every day?
It is designed for on-demand use, not scheduled daily treatment. It should not be taken more than once within 24 hours.
What is the difference between dapoxetine and duloxetine?
Dapoxetine is a short-acting SSRI licensed specifically for on-demand PE treatment. Duloxetine is a longer-acting SNRI which, when used for PE, is used off-label and generally as a continuous treatment rather than immediately before sex.
Can duloxetine make it difficult to climax?
Yes. Delayed ejaculation and impaired orgasm can occur with serotonergic antidepressants. This is partly why they can improve PE, but excessive delay or inability to orgasm represents an unwanted adverse effect rather than a better treatment result.
Does tadalafil make you last longer?
Tadalafil primarily improves erectile physiology. Some men may experience better overall sexual confidence or ejaculation control when erection anxiety is removed, but tadalafil is not principally an ejaculation-delaying drug.
Does TRT cure premature ejaculation?
No. TRT is not a standard PE treatment. It should be used for appropriately diagnosed testosterone deficiency.
Can penis filler treat premature ejaculation?
Penis filler is primarily a girth-enhancement procedure rather than an established first-line PE treatment. Some studies have reported changes in ejaculation-related outcomes following penile filler, but conventional PE treatments such as dapoxetine have a considerably stronger established role.
Does penis filler improve erections?
Not directly. Penis filler sits outside the erectile bodies and does not reproduce the nitric oxide–cGMP mechanism responsible for erection quality. A man may feel more confident after treatment, but erectile dysfunction should be assessed and treated separately.
Does penis enlargement automatically improve a partner's pleasure?
No. Increased girth may alter physical sensation for some couples, but partner pleasure depends on considerably more than anatomy. No ethical clinician should guarantee improved partner satisfaction following penis enlargement.
Final Clinical Answer
Male sexual confidence is not one biological pathway. Tadalafil supports erection reliability. Dapoxetine is the main licensed oral treatment for premature ejaculation and provides on-demand ejaculation control. Duloxetine represents a possible off-label continuous PE strategy for selected men, but with greater potential for persistent serotonergic sexual side effects. TRT can restore sexual function when genuine testosterone deficiency is present. Penis filler changes penile girth and may improve anatomical confidence, but it does not directly treat vascular erectile dysfunction.
The best outcomes come from identifying which part of the sexual response is actually failing rather than throwing multiple treatments at the same patient.
Book a Confidential Consultation
Aiva Wellness provides doctor-led assessment for men concerned about sexual performance, erectile function, premature ejaculation and penile size. Treatment should follow proper assessment of symptoms, medical history, medication, cardiovascular risk, psychological factors and patient expectations.
Editorial Policy
Aiva Wellness educational content is written and medically reviewed by GMC-registered doctors. Articles are based on available clinical guidelines, peer-reviewed research and clinical experience. Evidence is reviewed periodically as new research becomes available.
Medical Disclaimer
This article is for general educational purposes and does not replace individual medical assessment, diagnosis or treatment. Prescription medicines require clinical assessment and may not be suitable for every patient.
Licensing and Off-Label Medicines
Dapoxetine is licensed in the UK for appropriately diagnosed premature ejaculation within its authorised indication. Duloxetine is not licensed specifically for premature ejaculation and its use for this purpose is off-label. Some products used for penile augmentation may also be used outside their licensed indication. Patients should be informed whenever an off-label treatment is being considered.
Conflict of Interest Disclosure
The author provides private medical and aesthetic treatments through Aiva Wellness, including penis fillers. This represents a potential financial conflict of interest and is disclosed for transparency.
References
- National Institute for Health and Care Excellence. Premature ejaculation: dapoxetine. Evidence summary ESNM40. London: NICE; 2014.
- McMahon CG, Althof SE, Kaufman JM, Buvat J, Levine SB, Aquilina JW, et al. Efficacy and safety of dapoxetine for the treatment of premature ejaculation: integrated analysis of results from five phase 3 trials. J Sex Med. 2011;8(2):524-539. doi:10.1111/j.1743-6109.2010.02097.x.
- Zaazaa A, Nasr Eldin M, Gamal El Din SF, Zeidan A, Saleh MYM, Adel A, et al. Daily intake of 30 mg duloxetine is effective in decreasing premature ejaculation severity: a prospective randomized placebo-controlled cross over clinical trial. Basic Clin Androl. 2023;33(1):34. doi:10.1186/s12610-023-00210-1.
- European Association of Urology. EAU Guidelines on Sexual and Reproductive Health. Arnhem: EAU Guidelines Office; 2026.
- Hackett G, Kirby M, Rees RW, Jones TH, Muneer A, Livingston M, et al. The British Society for Sexual Medicine guidelines on male adult testosterone deficiency, with statements for practice. World J Mens Health. 2023;41(3):508-537. doi:10.5534/wjmh.221027.
- Yang DY, Ko K, Lee SH, Lee WK, Kim SW, Kim SW, et al. A comparison of the efficacy and safety between hyaluronic acid and polylactic acid filler injection in penile augmentation: a multicenter, patient/evaluator-blinded, randomized trial. J Sex Med. 2019;16(4):577-585. doi:10.1016/j.jsxm.2019.01.310.
- Chaudhry M, Chaudhry AR. A novel application of a single-entry injection technique for non-surgical penile enlargement: a case report. Cureus. 2025;17(5):e83637. doi:10.7759/cureus.83637. PMID: 40486481.
- Trost L, Watter DN, Carrier S, Khera M, Yafi FA, Bernie HL, et al. Cosmetic penile enhancement procedures: an SMSNA position statement. J Sex Med. 2024;21(6):573-578. doi:10.1093/jsxmed/qdae045.