Confidential urology & andrology · KIMS Secunderabad
Erectile Dysfunction — Causes, Evaluation, and Treatment Options at KIMS Secunderabad
Erectile dysfunction — the persistent inability to achieve or maintain an erection sufficient for satisfactory sexual activity — affects an estimated 10 to 52% of men between the ages of 40 and 70, and is increasingly common in younger men. In India, the prevalence is significant but substantially underreported because of the stigma attached to seeking help. Most men with erectile dysfunction wait years before consulting a doctor — years during which an underlying condition that is causing the ED, and that is both treatable and potentially serious, remains undiagnosed.
That underlying condition matters. Erectile dysfunction is frequently the first clinical sign of cardiovascular disease, diabetes, hypertension, hypogonadism, or neurological disease — conditions that, identified early, can be treated before they cause more serious harm. The Massachusetts Male Aging Study found that men with moderate or severe ED had a significantly higher 10-year cardiovascular event rate than men without ED. ED is not just a sexual health problem — it is a cardiovascular risk marker that should be taken seriously.
This page explains what erectile dysfunction is, what causes it, how it is evaluated at KIMS, and what the full range of treatment options looks like — from lifestyle and medication through to surgical options for complex cases. Seeking help is the right decision and the first step toward both a solution and a health evaluation.
How erections work — and what goes wrong
An erection is a complex neurovascular event requiring the coordinated function of the nervous system, the vascular system, the endocrine system, and the psychological state — all simultaneously. Sexual arousal (visual, tactile, or psychological) triggers parasympathetic nerve signals that cause the smooth muscle of the corpora cavernosa (the two cylindrical chambers running the length of the penis) to relax. As the smooth muscle relaxes, blood floods into the corpora cavernosa, compressing the veins that normally drain blood away. Blood is trapped inside the erect penis, maintaining the erection. Orgasm triggers sympathetic signals that contract the smooth muscle, drain the blood, and end the erection.
Erectile dysfunction can result from a failure at any point in this sequence — reduced blood flow in (vascular), impaired nerve signals (neurological), insufficient testosterone (endocrine), psychological factors that prevent adequate arousal or cause anxiety that triggers premature sympathetic tone (psychogenic), or structural problems within the corpora cavernosa (Peyronie's disease, post-surgical or post-radiation fibrosis).
Causes of erectile dysfunction
Erectile dysfunction is grouped into five clinical categories based on the mechanism of failure. Identifying the correct category is the foundation of a successful treatment plan — the same symptom can have very different underlying drivers, and the right treatment depends on the right diagnosis.
Vascular causes — the most common category
Vascular ED results from insufficient arterial blood flow into the penis, or excessive venous drainage (venous leak). Atherosclerosis — the same process that causes coronary artery disease and stroke — also affects the small penile arteries. Because penile arteries are smaller than coronary arteries, atherosclerosis affects them earlier — which is why ED often predates coronary artery disease by 3 to 5 years. ED in a man above 40 without an obvious psychogenic cause is a cardiovascular risk screen waiting to happen. Risk factors for vascular ED: hypertension, diabetes, high cholesterol, smoking, obesity, and physical inactivity.
Neurological causes
Conditions affecting the nerves involved in erection — the pelvic autonomic nerves and pudendal nerves — cause neurogenic ED. Causes include: diabetes (diabetic autonomic neuropathy is one of the most common causes of ED in India), spinal cord injury, multiple sclerosis, stroke, Parkinson's disease, and pelvic surgery (radical prostatectomy, total cystectomy, rectal surgery — all carry risk of injury to the cavernous nerves that run alongside the prostate and rectum). At KIMS, nerve-sparing robotic prostatectomy (RARP) using the Da Vinci Xi and X platforms specifically minimises this risk for prostate cancer patients.
Endocrine causes
Testosterone deficiency (hypogonadism) reduces libido and can impair erectile function. Testosterone is not directly required for the vascular mechanism of erection — but it is required for maintaining libido, the psychological drive to erect, and the sensitivity of the erectile tissue. Low testosterone in men with ED is identified on a fasting morning testosterone level and treated with testosterone replacement therapy (TRT) under endocrine and urology supervision. Other endocrine causes: prolactinoma (elevated prolactin suppresses testosterone production), thyroid disease (both hypothyroidism and hyperthyroidism can impair sexual function), and poorly controlled diabetes.
Psychogenic causes
Psychogenic ED results from anxiety, depression, relationship problems, performance anxiety, or stress — without an underlying physical cause. It is more common in younger men (below 40) and is characterised by the preserved ability to achieve erections in some contexts (morning erections, masturbation) but not in others (partnered sexual activity). Psychogenic and organic ED frequently coexist — an initial physical cause creates performance anxiety, which then sustains the problem even when the physical cause is treated.
Post-surgical and post-radiation causes
Radical prostatectomy (removal of the prostate for prostate cancer) carries risk of erectile dysfunction from injury to the cavernous nerves. At KIMS, nerve-sparing RARP using the Da Vinci Xi or X provides the highest-precision nerve preservation available in any surgical approach — the 10x magnified 3D vision and 7-degree instrument freedom allow the neurovascular bundles to be dissected and preserved with a precision that open surgery cannot match. Penile rehabilitation (early PDE5 inhibitor therapy post-RARP) is part of the standard post-operative protocol. Radiation to the prostate, bladder, or rectum can cause delayed endothelial damage to the penile arteries, causing ED that manifests 1 to 3 years after radiation.
Evaluation at KIMS — what the assessment involves
A structured evaluation of erectile dysfunction at KIMS is thorough but straightforward. The assessment covers:
Full sexual and medical history
Onset of ED (sudden suggests psychogenic or medication-related; gradual suggests vascular or endocrine), presence of morning erections (preserved morning erections favour psychogenic cause), associated symptoms (urinary symptoms suggesting BPH, cardiovascular symptoms, symptoms of low testosterone), current medications (antidepressants, beta-blockers, antihypertensives, antiandrogens — all can cause ED), and relationship history.
IIEF-5 score (International Index of Erectile Function)
A validated 5-question questionnaire that quantifies ED severity: mild, mild-to-moderate, moderate, or severe.
Physical examination
Blood pressure (hypertension is a common ED cause), BMI, testicular size and consistency (reduced testicular volume suggests hypogonadism), secondary sexual characteristics, and penile examination (Peyronie's plaques, phimosis, hypospadias).
Investigations
Fasting glucose and HbA1c (diabetes), lipid profile (cardiovascular risk), fasting morning testosterone (three separate measurements on different days — testosterone levels fluctuate), LH and FSH (if testosterone is low — to distinguish primary from secondary hypogonadism), prolactin (if testosterone is low and LH/FSH are also low), PSA (before testosterone replacement therapy in men above 45).
Penile Doppler ultrasound
Where vascular ED is suspected and pharmacological treatment has not responded, duplex Doppler ultrasound of the penile arteries (after intracavernosal injection of prostaglandin E1) measures peak systolic velocity and end-diastolic velocity — quantifying arterial inflow and venous drainage. Performed at KIMS where clinically indicated.
Treatment options at KIMS
Effective treatments for erectile dysfunction are available at every severity level. The KIMS andrology team builds a stepped treatment plan — beginning with lifestyle and oral therapy, and progressing through injection, device, and surgical options where required.
Lifestyle modification — the foundation of treatment
For vascular ED from modifiable risk factors, lifestyle changes improve erectile function significantly — sometimes without pharmacological treatment. Cessation of smoking (which impairs endothelial function directly), regular aerobic exercise (30 minutes on most days of the week — the most evidence-based intervention for vascular ED), weight loss in obese patients, alcohol reduction, and optimisation of blood pressure, glucose, and cholesterol all improve erectile function independently of PDE5 inhibitors.
PDE5 inhibitors — sildenafil, tadalafil, vardenafil
Phosphodiesterase type 5 (PDE5) inhibitors are the established first-line pharmacological treatment for ED in men with a vascular or mixed-cause mechanism. They enhance the nitric oxide-mediated relaxation of cavernosal smooth muscle, increasing arterial inflow during sexual arousal. They require sexual stimulation to work — they do not cause automatic erections. Sildenafil (Viagra, Caverta) is taken 30 to 60 minutes before sexual activity, effective for 4 to 6 hours. Tadalafil (Cialis) has a longer duration of 24 to 36 hours and is also available as a daily low-dose formulation (5mg once daily) — useful for men who prefer spontaneity. PDE5 inhibitors are contraindicated with nitrate medications (GTN, isosorbide mononitrate) — the combination can cause severe hypotension.
Vacuum erection device
A non-pharmacological option — a cylinder placed over the penis with a vacuum pump that draws blood into the corpora cavernosa. A constriction ring at the base maintains the erection. Effective in the majority of men with organic ED. Particularly useful as a penile rehabilitation tool after prostate surgery while nerve recovery occurs.
Intracavernosal injections
Prostaglandin E1 (alprostadil) injected directly into the corpora cavernosa produces a reliable erection regardless of the neural or psychological state — effective even when PDE5 inhibitors have failed. Taught by the KIMS andrology team as a self-injection technique. Response rates above 80% for all causes of organic ED.
Testosterone replacement therapy (TRT) — for hypogonadal men
In men where ED is associated with confirmed hypogonadism (low testosterone — below 12 nmol/L on two fasting morning measurements), testosterone replacement therapy restores libido and frequently improves erectile function. TRT is available as intramuscular injection (testosterone enanthate or undecanoate), transdermal gel, or oral undecanoate. TRT requires monitoring of haematocrit (testosterone stimulates red cell production — polycythaemia risk), PSA (contraindicated in prostate cancer), and testosterone levels. The KIMS andrology team supervises TRT with regular monitoring.
Penile prosthesis — for refractory ED
For men with ED that has not responded to PDE5 inhibitors, intracavernosal injections, and VED — particularly those with vascular ED after prostate cancer surgery — a penile prosthesis (inflatable or malleable) is the definitive surgical option. An inflatable three-piece prosthesis allows the man to control the timing and duration of erection. The procedure is performed by the KIMS urology team and has high long-term patient and partner satisfaction rates.
All consultations at KIMS are confidential and conducted in a private room. The KIMS urology and andrology team approaches ED in a clinical, non-judgmental manner — it is a medical condition with specific causes and specific treatments. Call 040-4488-5000 to book a confidential consultation.
Book a Confidential Consultation for Erectile Dysfunction at KIMS
Frequently Asked Questions — Erectile Dysfunction
It is common — but it is not something that must be accepted as inevitable. The Massachusetts Male Aging Study found that approximately 40% of men at age 40 have some degree of ED. But 'common' does not mean untreatable or unimportant. ED at 40 should prompt a cardiovascular risk assessment — it is frequently the first sign of atherosclerosis, diabetes, or hypertension. Treating the underlying condition both reduces cardiovascular risk and, in many cases, improves erectile function. In addition, effective treatments for ED itself are available at every severity level — from lifestyle changes and oral PDE5 inhibitors through to injections and surgical prostheses.
Yes — psychogenic ED is one of the most common categories, particularly in younger men. Stress, anxiety, depression, performance anxiety, and relationship difficulties all activate the sympathetic nervous system — which is the system that ends erections. Performance anxiety is self-perpetuating: an episode of ED creates fear of the next episode, which creates anxiety, which prevents erection, confirming the fear. Psychogenic ED is distinguished from organic ED by the presence of normal morning erections and normal erections in some contexts (masturbation, different partners, or different situations). It is treated with a combination of PDE5 inhibitors (which provide confidence while the psychological factors are addressed), psychosexual counselling, and treatment of the underlying anxiety or depression.
Yes — diabetes is one of the most common causes of ED, and the connection operates through multiple mechanisms simultaneously. Diabetic autonomic neuropathy damages the parasympathetic nerves that initiate erection. Diabetic angiopathy damages the small penile arteries, reducing arterial inflow. Endothelial dysfunction from chronic hyperglycaemia reduces nitric oxide production. Low testosterone is more common in diabetic men. The cumulative effect is that ED affects 35 to 75% of diabetic men — a prevalence significantly higher than in the non-diabetic population. Optimising glucose control, treating underlying autonomic neuropathy where possible, and using PDE5 inhibitors or intracavernosal injections for direct treatment are the standard approach.
Yes — several commonly prescribed medications impair erectile function and should be reviewed when ED is first evaluated. The most significant: beta-blockers (particularly older non-selective agents like propranolol — carvedilol and nebivolol have significantly lower ED risk), thiazide diuretics, spironolactone, finasteride (used for BPH and male pattern baldness), SSRIs and SNRIs (antidepressants cause sexual dysfunction in 30 to 70% of users), antipsychotics, and antiandrogens. If a medication change corresponds with the onset of ED, this should be specifically discussed with the prescribing doctor — an alternative agent in the same class often has significantly lower sexual side effects.
No — and particularly not if you take any nitrate medications (glyceryl trinitrate for angina, isosorbide mononitrate or dinitrate). The combination of a PDE5 inhibitor and a nitrate causes severe, potentially fatal hypotension. In addition, PDE5 inhibitors can cause significant blood pressure drops in men with severe cardiovascular disease, severe aortic stenosis, or those taking multiple antihypertensives. Before starting any PDE5 inhibitor, a proper cardiovascular assessment should be completed. The KIMS andrology team provides a supervised evaluation before prescribing — including a review of all concurrent medications and cardiovascular history.
Whether ED can be permanently resolved depends on its cause. Psychogenic ED often resolves fully with treatment of the underlying psychological factors and confidence restoration through short-term PDE5 use. ED from a reversible cause — hypothyroidism, hyperprolactinaemia, or medication side effect — resolves when the cause is treated. Vascular ED from established atherosclerosis is generally not fully reversible, but can be effectively managed with PDE5 inhibitors, lifestyle optimisation, and if necessary, intracavernosal injections or penile prosthesis. ED from nerve injury after prostate surgery can partially recover over 12 to 24 months with penile rehabilitation, particularly after nerve-sparing robotic prostatectomy.
Yes — all consultations at KIMS are confidential. Erectile dysfunction consultations are conducted in a private room with the patient alone or with whomever they choose to bring. Medical records are confidential and not shared without the patient's consent. The KIMS urology and andrology team approaches ED in a clinical, non-judgmental manner — it is a medical condition with specific causes and specific treatments. Call 040-4488-5000 to book a confidential consultation with Dr. Neil Narendra Trivedi or Dr. Likhiteswer Pallagani.
KIMS Secunderabad — Dr. Neil Narendra Trivedi (MCh Urology KEM Hospital Mumbai, Member SIU — the leading global urology academic society, andrologist), Dr. Likhiteswer Pallagani (Vattikuti Foundation fellowship, 400+ robotic surgeries including nerve-sparing RARP), comprehensive ED evaluation including testosterone assessment, penile Doppler where indicated, intracavernosal injection therapy, and penile prosthesis surgery for refractory ED. Confidential consultation. Call 040-4488-5000.