ED in your 30s is more common than men think — surveys put prevalence at around 1 in 4 by mid-thirties. It's almost always treatable. The mistake most men make is assuming it's stress and "it'll pass" — for some it does, but in many cases there's a real, identifiable, fixable cause that gets worse the longer it's ignored.
Here's the workup most NZ men don't get from a five-minute GP visit.
First — is it actually ED?
Definitions matter. ED is the consistent inability to get or maintain an erection adequate for satisfactory sexual activity. One bad night because you'd had four beers and a stressful week isn't ED. ED is a pattern over weeks or months.
Sub-questions:
- Can you get an erection at all (with masturbation, morning erections, with one partner but not another)?
- Can you get one but not maintain it?
- Has it changed gradually or did it start suddenly?
These answers point at different causes.
The 5 buckets — and which to check first
1. Vascular (the most important to rule out)
Why it matters: ED is one of the earliest signals of cardiovascular disease. It can precede a cardiac event by 3–5 years. The blood vessels in the penis are smaller than those in the heart, so endothelial dysfunction shows up there first.
Red flags: sudden-onset ED, ED that's worsening month-on-month, family history of heart disease, smoking, high BP, high cholesterol, diabetes, weight gain.
Workup: baseline blood pressure, fasting lipids, HbA1c, BMI, waist circumference. If significant risk factors, consider a cardiology review.
2. Hormonal (testosterone, prolactin, thyroid)
Why it matters: low testosterone causes low libido and contributes to ED. High prolactin (sometimes from a pituitary issue) does the same. Thyroid dysfunction in either direction affects sexual function.
Workup: morning testosterone (×2 if low), SHBG, calculated free T, LH, FSH, prolactin, TSH.
What it doesn't tell you: if your testosterone is in the lower-normal range but your ED is severe, testosterone probably isn't the primary cause. Don't fixate on it.
3. Medication-induced
Why it matters: common medications that cause or worsen ED in NZ men:
- SSRIs and SNRIs (sertraline, citalopram, venlafaxine, etc.) — extremely common cause. Often dose-dependent.
- Beta-blockers (metoprolol, propranolol) — especially older agents
- Thiazide diuretics (bendrofluazide, hydrochlorothiazide)
- Finasteride / dutasteride for hair loss or BPH — small subset of men get persistent sexual side effects ("post-finasteride syndrome")
- Opioids — long-term use suppresses testosterone
- Some antipsychotics
- Recreational drugs — alcohol, MDMA, cocaine, cannabis (high doses)
Workup: review all current medications and recent changes. Don't stop anything without medical advice — but consider whether a medication change conversation with your GP is warranted.
4. Psychological (situational vs persistent)
Why it matters: psychological ED is real and common, but it's usually distinguishable from physical ED by clinical features.
Signals of psychological ED:
- Morning erections preserved (your body still works mechanically)
- Erections during masturbation preserved
- Specific situations trigger it (new partner, performance anxiety, relationship conflict)
- Sudden onset tied to a specific event
- Resolves with distraction or different context
Signals of physical ED:
- No morning erections
- Erections weak even with strong arousal
- Gradual worsening regardless of context
- Co-exists with other vascular/metabolic signs
Workup: structured history. PHQ-9 if depression is a factor. Sometimes a brief mental-health referral. Couples therapy if relationship is the dominant trigger.
5. Anatomical / neurological (rarer)
Why it matters: Peyronie's disease (penile plaque/curvature), spinal cord pathology, MS, post-surgery nerve damage. Less common in 30s without a specific history.
Workup: examination, history. Imaging only if specific signs.
What I check at Enhanced Men for ED in a 30-something
A typical first consult for ED in a man under 40:
History (15 min):
- Onset, pattern, situational vs constant
- Morning/spontaneous erections
- Libido — high, normal, low
- Medication review (all of them)
- Mental-health screen (PHQ-9, GAD-7 quick versions)
- Sleep — quality, hours, snoring (OSA is under-diagnosed and a real ED driver)
- Lifestyle — exercise, alcohol, drug use, smoking
- Cardiovascular risk — family history, BP, weight
Examination findings to capture:
- BP × 2 readings
- BMI, waist
- General exam — secondary sex characteristics, testicular size, gynaecomastia
- Penile exam if Peyronie's suspected
Bloods:
- Morning testosterone (×2 over 2–4 weeks)
- SHBG, calculated free T
- LH, FSH, prolactin, estradiol
- TSH
- Fasting lipids, HbA1c, FBC, LFTs, U&E
Then a plan, which usually includes one or more of:
- Lifestyle (sleep, alcohol, exercise, weight)
- Medication review (with current GP if not Enhanced Men prescribed)
- PDE5 inhibitor trial (sildenafil, tadalafil) — funded in NZ with specific criteria, private otherwise
- Hormonal correction if labs show it
- Mental-health referral if psychological
- Cardiac referral if vascular signs
What "treatment" actually looks like
PDE5 inhibitors (sildenafil, tadalafil):
- Sildenafil: 25–100 mg PRN, takes ~30 min to work, lasts ~4 hours
- Tadalafil: 10–20 mg PRN OR 5 mg daily for chronic use, lasts up to 36 hours
- Both work in about 70% of men with ED of any cause
- Contraindicated with nitrates, severe cardiac disease
Vacuum erection device: non-pharmaceutical, works mechanically. Slightly clunky but effective. Useful if PDE5i contraindicated or partial response.
Intracavernosal alprostadil injection: specialist option for men where the above fail.
Underlying cause treatment: weight loss, BP control, statin if dyslipidaemic, SSRI swap to a less ED-causing antidepressant (bupropion, mirtazapine) — these are the long-game fixes.
When to seek help (and when NOT to wait it out)
Seek help if:
- ED has lasted more than 3 months
- ED is getting worse, not better
- ED started suddenly with no obvious trigger
- ED is affecting your relationship or self-esteem
- You have CV risk factors (family history, smoking, BP)
Don't wait it out: the longer ED goes untreated, the more likely the underlying cause (cardiovascular, hormonal, psychological) is progressing. Early workup is more useful than late.
The honest bit
ED in your 30s is rarely "just life". It usually means something specific is happening — vascular, hormonal, psychological, or medication-related. Each of those has an actionable response. The men who do well are the ones who showed up early, did the workup, and changed the right thing. The men who do badly are the ones who waited five years hoping it'd resolve.
You don't have to wait. NZ men's-health telehealth makes the workup a 30-minute conversation. The labs and prescriptions follow.
Sources cited:
- BPAC NZ — Erectile dysfunction in primary care (BPJ 12, 2008)
- Goodfellow Unit — Erectile and endothelial dysfunction
- Healthify NZ — Erectile dysfunction
- RACGP / AJGP — Male sexual dysfunction (2023)
- Medsafe NZ — Sildenafil (Viagra) data sheet
This article is general information, not medical advice. ED has many causes and your specific case needs proper assessment by a medical professional.