Is tadalafil 5mg good for diabetes and your heart?

Tadalafil 5mg tablets are best known for treating erectile dysfunction, but did you know they might also play a role in managing diabetes and cardiovascular disease? This deep dive explores how tadalafil 5mg fits into the bigger picture of men’s health, especially for those living with type 2 diabetes and heart risk. We’ll cover the science, real-world tips, practical advice, and the latest research—so you can make informed choices about your health and treatment options.

Five key takeaways

• Tadalafil 5mg is licensed for daily use and may benefit men with diabetes and cardiovascular risk factors[1], [2], [3].
• Erectile dysfunction is a common and early warning sign in men with diabetes, and it’s closely linked to heart health [3].
• Regular use of tadalafil 5mg could reduce cardiovascular events and improve quality of life for men with type 2 diabetes [3], [9], [10], [11].
• There’s growing evidence that daily tadalafil 5mg can improve endothelial function, lower inflammation, and even support testosterone levels [7], [12], [13], [14].
• Despite the evidence, tadalafil and similar medicines are underused in men with diabetes and cardiovascular disease [3].

Understanding diabetes, cardiovascular disease, and erectile dysfunction

Type 2 diabetes is a major health challenge worldwide, and men are particularly affected.

In the UK, over a quarter of people aged 65+ have diabetes, with men making up more than half of those cases. The risk is even higher for men of South East Asian or African-Caribbean descent [3].

Living with diabetes increases the risk of heart disease, stroke, and other complications—and erectile dysfunction is often an early sign that something’s not right [3].

Erectile dysfunction, the canary in the mineshaft for cardiovascular disease

Erectile dysfunction (ED) isn’t just about sex—it’s a red flag for blood vessel health. In fact, ED is now recognised as an independent risk factor for cardiovascular events and is included in heart risk calculators. Studies show that men with diabetes and ED are more likely to have heart problems, and the risk goes up with age, higher blood sugar, and longer duration of diabetes [3], [6].

What is tadalafil 5mg, and how does it work?

Tadalafil 5mg is a phosphodiesterase type 5 inhibitor (PDE5I). It helps relax blood vessels, improving blood flow not only to the penis but also throughout the body [4].

Tadalafil 5mg is licensed to treat erectile dysfunction and is also used to treat the symptoms of an enlarged prostate [5].

It belongs to a class of drugs known as phosphodiesterase type 5 inhibitors, and these prevent the breakdown of a substance called cGMP [4].

Tadalafil can be taken on demand as tadalafil 10mg or 20mg, or as a daily dose at 2.5mg or as tadalafil 5mg [4], [6], [15].

To understand this further, we need to do a quick detour to look at the mechanism of an erection.

How an erection occurs

When a man becomes aroused, signals travel from the brain down the nerves to the penis, setting off a chain reaction.

These nerve signals cause the release of a chemical called nitric oxide. Nitric oxide acts as a messenger, telling the blood vessels in the penis to relax and widen. This happens because nitric oxide triggers the production of another molecule called cGMP, which plays a key role in the process.

cGMP works by lowering the amount of calcium inside the muscle cells of the penis. With less calcium, smooth muscles relax rather than contract, allowing blood to rush in and create an erection.

The erection is maintained as long as cGMP is present. Eventually, an enzyme called PDE5 breaks down cGMP, causing the muscles to tighten again and the erection to fade.

Why is tadalafil 5mg unique among the PDE5 inhibitors?

Tadalafil 5mg tablets are unique because they’re licensed for daily use, providing continuous support for men who need it. This makes them particularly helpful for men with ongoing conditions like:

• diabetes,
• cardiovascular disease and an
• enlarged prostate [1], [2], [3], [5].

Tadalafil’s benefits go beyond the bedroom. By improving blood vessel function and lowering inflammation, it may help reduce the risk of heart events and support overall vascular health [3].

Some studies also suggest daily use can boost testosterone levels and improve insulin sensitivity, making it a valuable tool in diabetes care [7], [13], [14].

Tadalafil 5mg is also licensed for use in those men with erectile dysfunction who also struggle with symptoms of an enlarged prostate [5].

The science: Tadalafil 5mg, diabetes, and cardiovascular health

A growing body of research links tadalafil 5mg tablets to better outcomes in men with diabetes and heart disease.

Several large studies have found that regular use of PDE5Is (like tadalafil) is associated with a significant reduction in all-cause mortality and major cardiovascular events.

For example, one study found a 31% reduction in all-cause mortality and a 26% reduction in heart attacks among men with type 2 diabetes taking PDE5Is [10].

Below, we present a complete list of studies highlighting the benefits of PDE5 inhibitors in reducing cardiovascular complications and risk.

Tadalafil 5mg, blood vessel health and testosterone levels

Daily tadalafil 5mg has also been linked to improvements in blood vessel health (endothelial function), reduced inflammation, and better testosterone levels. It is thought that increased blood flow to the testes facilitates increased testosterone production [7].

These effects may help explain the lower rates of heart problems and the improved quality of life observed in men using these medicines [3], [7], [13], [14].

Summary of the studies with tadalafil 5mg and cardiovascular health

Study (Author, Year)	Study Design & Population	Intervention	Key Findings	Reference
Anderson et al., 2016	Population-based cohort study; 5,956 UK men with type 2 diabetes	Regular use of PDE5Is (including Tadalafil 5mg)	31% reduction in all-cause mortality, 26% reduction in myocardial infarction vs non-users	[10]
Hackett et al., 2018	Prospective RCT; 175 men with T2DM	PDE5I use (including Tadalafil 5mg) vs no PDE5I	Significant, independent reduction in all-cause mortality for PDE5I users	[11]
Kloner et al., 2021	Nationwide cohort; 48,692 US men with ED and CVD risk	PDE5Is (dose-related, including Tadalafil 5mg)	25% reduction in overall mortality, 55% reduction in major adverse cardiovascular events, 41% reduction in all-cause mortality in the high-risk group	[9]
Aversa et al., 2007	RCT; 45 men with ED	Tadalafil 5mg daily vs 20mg on-demand	Only daily Tadalafil 5mg improved endothelial function, insulin sensitivity, and lean muscle mass	[12]
Oscan et al., 2017	Open-label; 40 men with metabolic syndrome	Tadalafil 5mg daily for 3 months	Testosterone increased from 11.45 to 16.5 nmol/L; IIEF-5 improved from 11.3 to 19	[13]
Spitzer et al., 2013	Clinical study; 106 men	Sildenafil 50–100mg on demand	Mean rise in testosterone of 3.6 nmol/L, fall in LH	[14]
Santi et al., 2016	Meta-analysis; 12 RCTs (n=476 men with T2DM)	Chronic PDE5I therapy (various agents, including Tadalafil 5mg)	Improved flow-mediated dilatation, reduced IL-6, and hs-CRP were nearly significant	[17]

*IIEF-5-International Index of Erectile Function

Side effects and safety profile

Tadalafil 5mg is generally well tolerated, but like all medicines, it can cause side effects. The most common include headache, indigestion, back pain, and muscle aches.

Serious side effects are rare but can include vision changes, hearing loss, or an erection lasting more than four hours. Always consult your pharmacist or doctor if you’re unsure [1], [2], [4].

Who should consider tadalafil 5mg daily?

• Men with type 2 diabetes and erectile dysfunction
• Men with cardiovascular risk factors (after medical review)
• Men with both erectile dysfunction and an enlarged prostate
• Those who want a continuous, daily approach rather than on-demand treatment
• Men with low testosterone and metabolic syndrome (after appropriate testing)

Practical tips: Taking tadalafil 5mg safely

• Always follow your healthcare provider’s advice and read the patient information leaflet before starting tadalafil 5mg [2]
• Take tadalafil 5mg at the same time each day for best results [5]
• Let your doctor know about all other medicines you’re taking, as some can interact with tadalafil [1], [2].
• Report any side effects, especially chest pain, vision changes, or prolonged erections [1], [2].
• Tadalafil 5mg isn’t suitable for everyone. Men with certain heart conditions, those taking nitrates, or with severe liver/kidney disease should avoid it [1], [2].

FAQs: Tadalafil 5mg tablets, diabetes, and cardiovascular disease

What is tadalafil 5mg, and how does it work?

Tadalafil 5mg is a daily tablet that can be used to treat erectile dysfunction and symptoms of an enlarged prostate. It works by relaxing blood vessels, improving blood flow throughout the body—including to the penis and heart. This can support both sexual function and cardiovascular health.

Can tadalafil 5mg tablets really reduce heart risk?

Studies suggest regular use of tadalafil 5mg is linked to lower rates of heart attacks and all-cause mortality in men with diabetes and cardiovascular risk factors.

Can Tadalafil 5mg help men with diabetes?

Yes! Tadalafil 5mg is particularly helpful for men with type 2 diabetes, as it can improve blood flow, reduce inflammation, and even support better blood sugar control. It’s also licensed for men with both diabetes and erectile dysfunction.

What are the benefits of taking Tadalafil 5mg daily instead of on demand?

Daily tadalafil 5mg offers continuous support, making it easier to enjoy spontaneous intimacy. It can also potentially providing ongoing benefits for heart and blood vessel health. It’s especially useful for men with chronic conditions like diabetes or cardiovascular disease.

Can tadalafil 5mg really reduce the risk of heart attacks or cardiovascular events?

Research suggests that regular use of tadalafil 5mg is linked to a lower risk of heart attacks and major cardiovascular events in men with diabetes and heart risk factors.

Is tadalafil 5mg safe for people with diabetes or heart disease?

For most people, yes—but it’s important to check with your GP or pharmacist first. Some conditions or medicines (like nitrates) can make tadalafil unsafe. Always read the patient information leaflet and seek advice if unsure.

Does tadalafil 5mg increase testosterone levels?

Some studies show that daily tadalafil 5mg can help raise testosterone. This may explain the improved mood, energy, and sexual function in men with low levels.

How long does it take for Tadalafil 5mg to work?

You might notice improvements in erectile function within a week. However, full benefits for blood vessels and testosterone may take several weeks of daily use.

Are there side effects I should watch out for?

Common side effects include headache, indigestion, back pain, and muscle aches. Serious side effects are rare but can include vision changes or an erection lasting more than four hours. Always report any concerns to your pharmacist or doctor.

Where can I buy tadalafil 5mg online in the UK?

You can purchase tadalafil 5mg tablets online from Courier Pharmacy after completing a quick, confidential erectile dysfunction online questionnaire. Our UK-registered pharmacists will review your answers to ensure tadalafil 5mg is safe and suitable for you before dispensing your medicine.

Do I need a prescription for tadalafil 5mg, and is it easy to order?

Yes, tadalafil 5mg is a prescription medicine in the UK. At Courier Pharmacy, you fill out the erectile dysfunction online questionnaire. If approved, our pharmacy team will dispense and deliver your medicine straight to your door—no need for a GP appointment.

Can I use tadalafil 5mg with other diabetes or heart medicines?

Often yes, but always check with your pharmacist or GP to be sure—some medicines (like nitrates) are dangerous to combine with tadalafil.

Conclusion: Why consider tadalafil 5mg?

Tadalafil 5mg tablets offer more than help in the bedroom—they could play a role in reducing heart risk and improving quality of life for men with diabetes.

With new evidence supporting daily use, it’s worth talking to your healthcare team about whether tadalafil 5mg could be right for you.

Remember, always seek professional advice before starting any new medicine. If you need further advice, please contact us.

Disclaimer: This article is for informational purposes only and does not replace professional medical advice.

References

• [1] BNF. (2025) Tadalafil. British National Formulary. Available at: https://bnf.nice.org.uk/drugs/tadalafil/ (Accessed: 2 November 2025).
• [2] Electronic Medicines Compendium (eMC). (2025) Tadalafil 10 mg film-coated tablets: Summary of Product Characteristics. Available at: https://www.medicines.org.uk/emc/product/12501/smpc (Accessed: 2 November 2025).
• [3] Hackett, G., & Kirby, M. (2023). The increasing role of PDE5Is in men with diabetes and cardiovascular disease. Trends in Urology and Men’s Health. Available at: https://bssm.org.uk/wp-content/uploads/2023/08/TRE926-PDE5Is-in-diabetes-Copy.pdf (Accessed: 2 November 2025).
• [4] Courier Pharmacy. (n.d.) The journey to once-daily dosing of tadalafil 5mg tablets. Available at: https://courierpharmacy.co.uk/the-journey-to-once-daily-dosing-of-tadalafil-5mg-tablets/ (Accessed: 14 October 2025).
• [5] Courier Pharmacy. (n.d.) Can tadalafil 5mg be used for an enlarged prostate? Available at: https://courierpharmacy.co.uk/can-tadalafil-5mg-be-used-for-an-enlarged-prostate/ (Accessed: 14 October 2025).
• [6] Courier Pharmacy. (n.d.) How to take tadalafil. Available at: https://courierpharmacy.co.uk/how-to-take-tadalafil/ (Accessed: 14 October 2025).
• [7] Courier Pharmacy. (2025) Can tadalafil 5mg increase testosterone levels? Available at: https://courierpharmacy.co.uk/can-tadalafil-5mg-increase-testosterone-levels/ (Accessed: 2 November 2025).

Studies with tadalafil 5mg and cardiovascular health

• [9] Kloner, R.A., Stanek, E., Crowe, C.L., Singhal, M., Pepe, R.S., Bradsher, J. and Rosen, R.C., 2023. Effect of phosphodiesterase type 5 inhibitors on major adverse cardiovascular events and overall mortality in a large nationwide cohort of men with erectile dysfunction and cardiovascular risk factors: a retrospective, observational study based on healthcare claims and national death index data. The journal of sexual medicine, 20(1), pp.38-48.
• [10] Anderson, S.G., Hutchings, D.C., Woodward, M., Rahimi, K., Rutter, M.K., Kirby, M., Hackett, G., Trafford, A.W. and Heald, A.H., 2016. Phosphodiesterase type-5 inhibitor use in type 2 diabetes is associated with a reduction in all-cause mortality. Heart, 102(21), pp.1750-1756.
• [11] Hackett, G., Heald, A.H., Sinclair, A., Jones, P.W., Strange, R.C. and Ramachandran, S., 2016. Serum testosterone, testosterone replacement therapy and all?cause mortality in men with type 2 diabetes: retrospective consideration of the impact of PDE5 inhibitors and statins. International journal of clinical practice, 70(3), pp.244-253.

Studies with tadalafil and endothelial function

• [12] Aversa, A., Greco, E., Bruzziches, R., Pili, M., Rosano, G. and Spera, G., 2007. Relationship between chronic tadalafil administration and improvement of endothelial function in men with erectile dysfunction: a pilot study. International journal of impotence research, 19(2), pp.200-207.

Tadalafil and its effects on testosterone levels

• [13] Ozcan, L., Polat, E.C., Kocaaslan, R., Onen, E., Otunctemur, A. and Ozbek, E., 2017. Effects of taking tadalafil 5 mg once daily on erectile function and total testosterone levels in patients with metabolic syndrome. Andrologia, 49(9), p.e12751.
• [14] Spitzer, M., Basaria, S., Travison, T.G., Davda, M.N., Paley, A., Cohen, B., Mazer, N.A., Knapp, P.E., Hanka, S., Lakshman, K.M. and Ulloor, J., 2012. Effect of testosterone replacement on response to sildenafil citrate in men with erectile dysfunction: a parallel, randomized trial. Annals of internal medicine, 157(10), pp.681-691.

Pharmacokinetics of PDE5i

• [15] Courier Pharmacy. (n.d.) How long does tadalafil 20mg last after taking it? Available at: https://courierpharmacy.co.uk/how-long-does-tadalafil-20mg-last-after-taking-it/ (Accessed: 14 October 2025).
• [16] Courier Pharmacy. (2025) How long does sildenafil last for, and how long does it take to work? Available at: https://courierpharmacy.co.uk/how-long-does-sildenafil-last-for-and-how-long-does-it-take-to-work/ (Accessed: 2 November 2025).
• [17] Santi, D., Giannetta, E., Isidori, A.M., Vitale, C., Aversa, A. and Simoni, M., 2015. Therapy of endocrine disease: effects of chronic use of phosphodiesterase inhibitors on endothelial markers in type 2 diabetes mellitus: a meta-analysis. European journal of endocrinology, 172(3), pp.R103-R114.