Erectile Dysfunction Treatments Prescribed by UK Doctors

Erectile dysfunction is defined as the persistent inability to achieve or maintain an erection sufficient for satisfactory sexual performance.

The condition affects an estimated 30% of men aged 40-70 in the UK, with prevalence rising sharply after 50.

ED is not simply an inconvenience; it frequently signals underlying cardiovascular disease, metabolic syndrome, or hormonal imbalance.

Vascular causes account for approximately 70% of organic ED.

Atherosclerosis narrows the penile arteries just as it does coronary vessels, and research published in the European Heart Journal shows that ED precedes a cardiac event by an average of 3-5 years.

This makes early investigation clinically important.

Neurological contributors include diabetic neuropathy, multiple sclerosis, and spinal cord injury, all of which disrupt the nerve pathways required for tumescence.

Endocrine causes such as hypogonadism (serum testosterone below 8 nmol/L) reduce libido and may impair the erectile response even when blood flow is adequate.

Psychological factors — performance anxiety, depression, relationship stress — play a role in roughly 20% of cases and often coexist with physical causes.

A thorough clinical history distinguishes between psychogenic and organic ED, guiding treatment selection.

Risk factors that accelerate ED include:

• Smoking (doubles the risk compared with non-smokers)
• Obesity (BMI above 30 increases risk by 50%)
• Poorly controlled diabetes (HbA1c above 64 mmol/mol)
• Sedentary lifestyle with fewer than 150 minutes of weekly exercise
• Excessive alcohol intake exceeding 14 units per week

Phosphodiesterase type 5 inhibitors remain the gold-standard first-line therapy for ED, recommended by NICE, the European Association of Urology, and the British Society for Sexual Medicine.

These medications block the enzyme that degrades cyclic GMP in penile smooth muscle, thereby prolonging vasodilation and facilitating erection when sexual stimulation occurs.

Sildenafil (Viagra) is the most widely prescribed option. Standard doses range from 25 mg to 100 mg, taken 30-60 minutes before sexual activity.

Onset is typically within 30 minutes, with a clinical duration of 4-6 hours. Efficacy rates in clinical trials reach 82% at the 100 mg dose. A high-fat meal can delay absorption by up to one hour.

Tadalafil (Cialis) offers a significantly longer half-life of 17.5 hours, producing a therapeutic window of up to 36 hours. Doses range from 2.5 mg daily to 20 mg on-demand.

The daily 5 mg regimen suits men who prefer spontaneity without planning around a tablet. Food does not affect tadalafil absorption.

Vardenafil (Levitra) and avanafil (Spedra) provide intermediate profiles. Avanafil has the fastest onset at approximately 15 minutes and the fewest food interactions.

All PDE5 inhibitors carry an absolute contraindication with nitrate medications (GTN spray, isosorbide mononitrate) owing to the risk of life-threatening hypotension.

Caution is also required with alpha-blockers, some antihypertensives, and potent CYP3A4 inhibitors such as ketoconazole.

The MHRA mandates that prescribers screen for these interactions before issuing a prescription.

Common side effects include:

• Headache (reported by 12-16% of patients)
• Facial flushing (approximately 10%)
• Nasal congestion (3-5%)
• Dyspepsia (4-7%)
• Visual disturbance with sildenafil (blue-tint, under 2%)

Obtaining ED treatment through Dr. Presc follows a structured, GMC-compliant clinical pathway that mirrors an in-person GP consultation.

The process begins with a validated medical questionnaire covering your symptom history, cardiovascular risk factors, current medications, and relevant lifestyle details.

A UK-registered prescriber reviews every submission individually. This is not an automated tick-box exercise.

The clinician assesses your cardiovascular status, checks for contraindications, and determines whether further investigation (such as blood tests for testosterone, HbA1c, or lipid profile) is advisable before prescribing.

If treatment is clinically appropriate, a prescription is issued and dispensed by a GPhC-registered pharmacy.

Medications are dispatched in plain, unmarked packaging with tracked delivery options including next-day service.

Safety features built into the process include:

• Mandatory disclosure of nitrate use and recent cardiovascular events
• Automatic flagging of drug interactions via the prescribing system
• Follow-up consultations available at no extra charge if the initial treatment is ineffective
• Refusal to prescribe when clinical criteria are not met, with a recommendation to attend your GP surgery

The consultation is confidential and compliant with UK data protection regulations. Your GP can be notified of the prescription if you consent, which is recommended for continuity of care.

Men who have not had a cardiovascular assessment in the past 12 months are advised to arrange one through their NHS practice.

All prescriptions carry a clinical review date. Repeat orders prompt a brief reassessment to ensure the treatment remains appropriate and side effects are tolerable.

Pharmacotherapy works best when combined with evidence-based lifestyle changes.

A landmark study published in the Journal of Sexual Medicine demonstrated that intensive lifestyle intervention improved erectile function scores by 30% over two years, independent of medication use.

Exercise is the single most impactful modifiable factor.

Aerobic activity — brisk walking, cycling, swimming — for 150-200 minutes per week improves endothelial function, the biological process underpinning normal erections.

A meta-analysis of 10 trials found that aerobic exercise alone improved IIEF scores by an average of 5 points, comparable to a low-dose PDE5 inhibitor.

Dietary patterns matter significantly.

The Mediterranean diet, rich in olive oil, oily fish, nuts, and vegetables, has been associated with a 40% reduction in ED risk in a cohort study of over 21,000 men.

Conversely, ultra-processed foods high in refined carbohydrates and trans fats worsen vascular function.

Weight management directly impacts testosterone levels.

Losing 5-10% of body weight can raise serum testosterone by 2-3 nmol/L in overweight men, often enough to shift from borderline-low into the normal range.

Additional evidence-based recommendations:

• Stop smoking — vascular improvement begins within 2-4 weeks of cessation
• Limit alcohol to under 14 units per week; acute intake above 4 units impairs erection quality
• Prioritise 7-9 hours of sleep; chronic sleep deprivation suppresses testosterone production by up to 15%
• Address psychological contributors through CBT or psychosexual therapy, which NICE endorses as an adjunct to medication

Pelvic floor exercises (Kegels) have also shown modest benefit in men with venous leak, strengthening the ischiocavernosus and bulbospongiosus muscles that maintain rigidity during erection.

While most cases of ED respond well to first-line treatment, certain presentations warrant prompt medical evaluation rather than online management.

Sudden-onset ED in a man with no prior difficulties may indicate an acute vascular event or a medication side effect.

Beta-blockers, thiazide diuretics, SSRIs, and spironolactone are among the most common drug culprits. A medication review with your GP can often identify the cause.

ED accompanied by chest pain, breathlessness, or leg claudication requires urgent cardiovascular assessment.

The penile arteries are roughly half the diameter of coronary arteries, so ED can be the earliest clinical sign of systemic atherosclerosis.

Other red flags include:

• Priapism (erection lasting over 4 hours) — a medical emergency requiring immediate A&E attendance
• Peyronie's disease signs such as penile curvature, plaques, or pain during erection
• Significant mood disturbance, suicidal ideation, or severe relationship breakdown
• Symptoms of hypogonadism: fatigue, reduced body hair, gynaecomastia, low libido
• Failure to respond to two different PDE5 inhibitors at maximum dose after adequate trial periods

Men over 40 presenting with new-onset ED should have baseline investigations including fasting glucose, lipid profile, and morning testosterone.

The QRISK3 cardiovascular risk calculator provides a 10-year risk estimate that guides preventive treatment decisions.

If you have a known cardiac condition, have suffered a stroke or TIA within the past 6 months, or take nitrate-based medications, you must consult your cardiologist or GP before using any ED treatment.

This is a non-negotiable safety requirement under MHRA prescribing guidance.