Causes, medicines, costs and how online consults work. Everything Hong Kong men need to know about erectile dysfunction.
Written by our Editorial Team · Medically reviewed by our doctors · Updated 14 Jul 2026
At a glance
Erectile dysfunction (不舉, or 陽痿) affects an estimated one in three men over 40 worldwide.
It isn’t simply a part of getting older. ED often signals an underlying heart or metabolic condition that’s worth catching early. First-line medicines work for most men, and an online consult means you can get a prescription without visiting a clinic.
1What is erectile dysfunction?
ED is when you persistently can’t get or keep an erection firm enough for satisfying sex. Most men have an off night now and then. It becomes a medical concern when it keeps happening and it bothers you.
An erection is about blood flow. Arousal releases nitric oxide in the penis, which relaxes smooth muscle and lets blood in. Anything that disrupts that, like damaged blood vessels, nerve injury, hormones or stress, can play a part.
That’s why ED is so often linked to heart health, and why the medicines that treat it work the way they do.
2How common is ED in Hong Kong?
More common than most people assume. International data suggests ED affects around 30–50% of men aged 40 to 70. Hong Kong-specific studies are limited, but neighbouring East Asian populations show similar patterns.
An ageing population, high rates of diabetes and high blood pressure, and an intense work culture all add to the risk here.
3Causes: body, mind and lifestyle
ED rarely has one cause. Most cases are a mix.
Physical causes
Heart disease and narrowed arteries,the most common physical cause.
Diabetes,which damages blood vessels and nerves. Men with diabetes are 2–3 times more likely to have ED.
High blood pressure and high cholesterol.
Low testosterone,which can lower drive and erections.
Nerve conditions,like spinal injury or nerve damage after prostate surgery.
Some medicines,including beta-blockers, some diuretics and SSRIs.
Psychological causes
Performance anxiety,where fear of it happening again makes it happen again.
Stress and long hours.
Depression and anxiety,and some of their treatments.
Relationship difficulties.
A sign it’s more mind than body: morning erections are still there, and it depends on the situation.
Lifestyle
Smoking,which raises the risk significantly.
Weight and inactivity.In one trial, diet and exercise improved erections in men with obesity.
Heavy drinking,which affects nerves and testosterone.
Poor sleep.
4Types of ED
Organic:a physical cause, most often blood flow. More common with age.
Psychogenic:no physical cause; stress, anxiety or low mood. More common under 40.
Mixed:the most common in practice. A bit of both.
Drug-induced:a side effect of another medicine. Never stop a prescribed medicine without talking to your doctor.
5ED medicines compared
PDE5 inhibitors are the first-line treatment for ED worldwide. They help the natural response to arousal, so they only work when you’re aroused. They don’t cause erections on their own.
Sildenafil (Viagra®):works in 30–60 minutes and lasts around 4–6 hours. The longest track record, and the most affordable as a generic. Best on an empty stomach or after a light meal.
Tadalafil (Cialis®):works in 30–60 minutes and lasts up to 36 hours, hence “the weekend pill”. Food barely affects it, and a 5 mg daily dose means there’s nothing to time.
Deal with stress.Sleep, boundaries on work, and someone to talk to.
9When to see a doctor
If it keeps happening and it bothers you, that’s reason enough. Tell your doctor how long it’s been going on, any health conditions and medicines, and whether morning erections are still there.
10Questions
It gets more common with age, but it isn’t inevitable, and it’s often linked to conditions worth treating.
For most men, yes, with side effects that are usually mild. They’re not safe with nitrates, which is one reason a doctor checks first.
No. It’s a prescription medicine, so a registered doctor needs to assess you first.
The same active ingredient. Generics cost less.
Not from us. Your consult is confidential, and your order arrives in plain packaging.
Tell your doctor. Follow-ups are free, and there are other options and doses to try.
References include Yafi FA et al., Nat Rev Dis Primers 2016; Esposito K et al., JAMA 2004; Hatzimouratidis K, Eur Urol 2007. This article is for general information only and isn’t medical advice. Treatment outcomes vary. Always follow your prescribing doctor’s instructions.