Losing Erection During Sex: Causes & Treatment

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Losing Erection During Sex: Causes, Solutions and Treatment

Published: 17 October 2026

Losing erection during sex is a common form of erectile dysfunction (ED) that affects many men at some point in their lives. It can happen for physical reasons such as reduced blood flow, psychological factors like performance anxiety, or a combination of both [1]. The good news is that this problem is highly treatable, and understanding the underlying causes is the first step towards finding a solution that works for you.

Why does losing erection during sex happen?

An erection requires a coordinated effort between your brain, nerves, blood vessels, and hormones. When you become aroused, blood flows into the penis and is trapped there by valves in the veins, creating firmness. Losing an erection during sex means this process is interrupted before you want it to end [1].

Physical causes include conditions that affect blood flow or nerve signals, such as cardiovascular disease, diabetes, high blood pressure, high cholesterol, obesity, or hormonal imbalances. Lifestyle factors like smoking, heavy alcohol use, lack of exercise, and poor sleep can also contribute [2]. Certain medications, including some antidepressants and blood pressure tablets, may affect erections as a side effect.

Psychological factors are equally important. Stress, anxiety (especially performance anxiety), depression, relationship difficulties, and past negative sexual experiences can all interfere with arousal and make it harder to maintain an erection [1]. Often, physical and psychological causes overlap: a physical issue may trigger anxiety, which then makes the problem worse.

Common triggers for losing erection during sex

Performance anxiety is one of the most frequent psychological triggers. Worrying about whether you will maintain an erection can create a self-fulfilling cycle: the anxiety itself disrupts the relaxation and arousal needed for an erection to continue [1]. This is especially common after experiencing ED once or twice, as the fear of it happening again can dominate your thoughts during sex.

Relationship issues, such as unresolved conflict, lack of communication, or reduced emotional intimacy with a partner, can also play a significant role. Feeling disconnected or under pressure can make it difficult to stay aroused [2].

Physical triggers include fatigue, heavy alcohol consumption before sex, recreational drug use (particularly cocaine and cannabis), and certain prescription medications. Conditions that reduce blood flow to the penis, such as atherosclerosis (narrowing of the arteries), are particularly important because ED can be an early warning sign of cardiovascular disease [10]. If you are experiencing new or worsening erection problems, it is important to see your GP for a health check.

When to see your GP

You should speak to your GP if losing erection during sex is happening regularly, causing you distress, or affecting your relationship. Your doctor can check for underlying health conditions such as diabetes, high blood pressure, or heart disease, which are often treatable [1]. A blood test may be arranged to check testosterone levels, blood sugar, and cholesterol. Seeing your GP is especially important if you have other symptoms such as chest pain, shortness of breath, or changes in urination, as these may indicate a more serious condition that needs attention.

Practical steps to help with losing erection during sex

Lifestyle changes can make a significant difference. Regular physical activity improves blood flow and cardiovascular health, both of which are essential for erections [2]. Aim for at least 150 minutes of moderate exercise per week, such as brisk walking, cycling, or swimming. Maintaining a healthy weight, eating a balanced diet rich in fruits, vegetables, whole grains, and lean protein, and reducing processed foods can also help.

Cutting down on alcohol and stopping smoking are two of the most effective steps you can take. Smoking damages blood vessels and reduces blood flow to the penis, while heavy drinking can interfere with the nervous system and hormone levels [1]. Reducing stress through relaxation techniques, mindfulness, or talking therapies can address psychological triggers.

Open communication with your partner is vital. Discussing your concerns together can reduce performance pressure and help you both feel more connected and relaxed. Some couples find it helpful to focus on intimacy and pleasure without the pressure of penetrative sex, which can reduce anxiety and allow erections to return naturally. If anxiety or relationship issues are significant, consider speaking to a counsellor or psychosexual therapist.

How prescription treatments can help with losing erection during sex

Prescription medicines called PDE5 inhibitors are the first-line treatment for erectile dysfunction and are highly effective for many men [2]. These medicines work by increasing blood flow to the penis when you are sexually aroused, making it easier to get and maintain an erection. They do not cause an erection on their own; sexual stimulation is still needed [3][4][5][6].

The most commonly prescribed PDE5 inhibitors in the UK are sildenafil (the generic form of Viagra), tadalafil (generic Cialis), vardenafil (generic Levitra), and avanafil (Spedra). Sildenafil is usually taken about one hour before sex and works for around four to six hours. Tadalafil can be taken on-demand at least 30 minutes before sex, with effects lasting up to 36 hours, or as a lower daily dose for continuous support [4]. Vardenafil works within 25 to 60 minutes, and avanafil is the fastest-acting, often effective within 15 to 30 minutes [6][11].

These medicines are prescription-only and require a consultation with a healthcare professional. At Cured Pharmacy, you complete an online health questionnaire that is reviewed by a UK-registered prescriber. If the treatment is suitable and safe for you, your prescription is dispensed and delivered discreetly to your door. All current medications and health conditions are checked during the consultation to ensure there are no unsafe interactions.

Who should not take PDE5 inhibitors

PDE5 inhibitors are not suitable for everyone. You must never take them if you use nitrate medicines (such as GTN spray, isosorbide mononitrate, or isosorbide dinitrate) for angina, nicorandil, riociguat, or recreational drugs called poppers (amyl or alkyl nitrites), as the combination can cause a dangerous drop in blood pressure [3][4]. They are also not suitable if you have recently had a heart attack or stroke, have unstable angina, severe heart failure, very low blood pressure, or certain eye conditions such as previous sudden vision loss (NAION) [2]. Your prescriber will review your full medical history and current medications to ensure the treatment is safe for you.

Choosing the right treatment for losing erection during sex

The choice of PDE5 inhibitor depends on your preferences, lifestyle, and how you plan to use it. Sildenafil is a good option if you want a well-established, cost-effective treatment that you take shortly before sex. It is available in 25 mg, 50 mg, and 100 mg doses, and your prescriber will recommend the right starting dose for you [3].

Tadalafil offers flexibility: the on-demand doses (10 mg or 20 mg) last much longer than sildenafil, which can reduce the need to time sex precisely. The daily low-dose option (2.5 mg or 5 mg) means you can be ready for sex at any time without planning ahead [4]. This can be helpful if you want to reduce performance pressure or have sex more frequently.

Vardenafil and avanafil are alternatives if sildenafil or tadalafil are not suitable or effective for you. Avanafil works quickly and may have fewer side effects in some men, making it a good choice if you want a fast-acting option [6][11]. Your prescriber can discuss which treatment is most appropriate based on your individual circumstances, and it is often possible to try a different medicine if the first one does not work well for you.

What to expect when using treatment for losing erection during sex

PDE5 inhibitors are generally well tolerated, but like all medicines, they can cause side effects in some people. Common side effects include headache, flushing, indigestion, nasal congestion, and dizziness [3][4][5][6]. These are usually mild and short-lived. If you experience side effects that bother you, speak to your prescriber, as adjusting the dose or trying a different medicine may help.

It is important to take the medicine as directed. Do not take more than one dose in 24 hours, and do not combine different PDE5 inhibitors or take them with nitrates or poppers [3][4]. Alcohol can make ED worse and increase the risk of side effects such as dizziness, so it is best to limit alcohol when using these treatments. Grapefruit juice can also raise the level of the medicine in your blood and should be avoided.

If you experience an erection lasting more than four hours (priapism), sudden loss of vision or hearing, or chest pain during sex, seek urgent medical help immediately [3][4]. These are rare but serious side effects. Most men find that PDE5 inhibitors work well and allow them to enjoy a fulfilling sex life. If the first treatment you try does not work, do not give up: your prescriber can adjust the dose, suggest a different medicine, or explore other options such as alprostadil cream or injections, or vacuum erection devices [2][7].

Getting treatment through Cured Pharmacy

Cured Pharmacy is a GPhC-registered online pharmacy (GPhC 9012511) offering discreet, convenient access to ED treatments. You complete a confidential online consultation, which is reviewed by a UK-registered prescriber. If treatment is appropriate, your medicine is dispensed by our pharmacy team and delivered in plain, unmarked packaging. You can choose from a range of licensed treatments, including generic and branded options, at transparent prices. Our team is available to answer any questions and provide ongoing support to help you manage your sexual health with confidence.

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 17 October 2026]
2. National Institute for Health and Care Excellence. (n.d.). Erectile dysfunction. Clinical Knowledge Summaries. https://cks.nice.org.uk/topics/erectile-dysfunction/ [accessed 17 October 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 17 October 2026]
4. Joint Formulary Committee. (n.d.). Tadalafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/tadalafil/ [accessed 17 October 2026]
5. Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 17 October 2026]
6. Joint Formulary Committee. (n.d.). Avanafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/avanafil/ [accessed 17 October 2026]
7. Feldman, H. A., Goldstein, I., Hatzichristou, D. G., Krane, R. J., & McKinlay, J. B. (1994). Impotence and its medical and psychosocial correlates: Results of the Massachusetts Male Aging Study. Journal of Urology, 151(1), 54–61. https://pubmed.ncbi.nlm.nih.gov/8254833/ [accessed 17 October 2026]
8. National Institute for Health and Care Excellence. (2014). Erectile dysfunction: avanafil (ESNM45). https://www.nice.org.uk/advice/esnm45 [accessed 17 October 2026]

Information on this page is for educational purposes only and is not medical advice. Prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting or changing any medication.

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