Some studies have linked bicycling to ED, though more research is needed to confirm the connection. Bicycle seats put pressure on nerves and blood vessels in the pelvic region. If you’re a frequent or long-distance cyclist, consider buying a seat specially designed to reduce pressure on your perineum. Learn more about the effects of cycling on erectile function.
Obesity. Obesity itself is not a risk factor for ED — but there is a connection. “The bigger concern is that obesity can lead to type 2 diabetes or vascular diseases, which are risk factors for ED,” says Montague. Morbid obesity, a term used to classify individuals who are significantly overweight, can cause hormonal changes that are triggered by excess body fat. In addition, obesity can put physical limitations on sexual intercourse.
Sildenafil (Viagra) was the first oral phosphodiesterase type 5 (PDE5) inhibitor approved by the FDA in the United States for the treatment of erectile dysfunction (it is not approved for women). Sildenafil inhibits PDE5, which is an enzyme that destroys cGMP. By inhibiting the destruction of cGMP by PDE5, sildenafil allows cGMP to accumulate. The cGMP in turn prolongs relaxation of the smooth muscle of the corpora cavernosa. Relaxation of the corpora cavernosa smooth muscle allows blood to flow into the penis resulting in increased engorgement of the penis. In short, sildenafil increases blood flow into the penis and decreases blood flow out of the penis.
In patients with low testosterone, testosterone treatment can improve libido and erectile dysfunction, but many men still may need additional oral medications such as sildenafil, vardenafil, or tadalafil. Some studies suggest that men with ED and low testosterone may respond better to PDE5 inhibitors when given testosterone therapy; however, this is controversial.
L-arginine is an amino acid that occurs naturally in the human body and helps make that magic nitric oxide so important for supporting an erection. A 1999 study observed the effects of six weeks of L-arginine administered daily among men with ED. One third of those who took five grams per day of L-arginine experienced significant improvements in sexual function.
Tadalafil (Cialis) is the third oral medicine approved by the U.S. FDA for the treatment of erectile dysfunction. Like sildenafil (Viagra) and vardenafil (Levitra), tadalafil inhibits PDE5 (as described earlier). Unlike the other PDE 5 inhibitors, patients should take tadalafil once daily and is approved for the treatment of BPH (benign enlargement of the prostate).
Talk with your doctor about going to a counselor if psychological or emotional issues are affecting your ED. A counselor can teach you how to lower your anxiety or stress related to sex. Your counselor may suggest that you bring your partner to counseling sessions to learn how to support you. As you work on relieving your anxiety or stress, a doctor can focus on treating the physical causes of ED.
If the patient complains of loss of sensation on his penile shaft or glans, it is useful to perform hot and cold perception testing and/or additional vibratory sensory testing with biothesiometer. These are tests that can be performed quickly during the office visit and provide useful information about the function of the dorsal nerve of the penis (Table 3).

Sexuality and erection are controlled by multiple areas of the human brain including the hypothalamus, the limbic system, and the cerebral cortex. Stimulatory or inhibitory messages are relayed to the spinal erection centers to facilitate or inhibit erection (5). Two mechanisms have been proposed to explain the inhibition of erection in psychogenic dysfunction: direct inhibition of the spinal erection center by the brain as an exaggeration of the normal suprasacral inhibition and excessive sympathetic outflow or elevated peripheral catecholamine levels, which may increase penile smooth muscle tone and prevent the relaxation necessary for erection (8). Animal studies demonstrate that the stimulation of sympathetic nerves or systemic infusion of epinephrine causes detumescence of the erect penis (6,7). Clinically, higher levels of serum norepinephrine have been reported in patients with psychogenic ED than in normal controls or patients with vasculogenic ED (9).


Few simple laboratory tests can help identify obvious causes of organic ED. Initial labs should include HbA1c, free testosterone, thyroid function tests, and prolactin levels. However, patients who do not respond to pharmacological therapy or who may be candidates for surgical treatment may require more in-depth testing, including nocturnal penile tumescence testing, duplex Doppler imaging, somatosensory evoked potentials, or pudendal artery angiography.
There are risks to prosthetic surgery and patients are counselled before the procedure. If there is a post-operative infection, the implant will likely be removed. The devices are reliable, but in the case of mechanical malfunction, the device or a part of the device will need to be replaced surgically. If a penile prosthesis is removed, other non-surgical treatments may no longer work.
For most men, improving erectile dysfunction means improving blood flow to the penis. Immediate relief often requires medications that increases nitric oxide (NO) in the blood vessels of the penis. NO causes the smooth muscle cells in the blood vessels of the penis to stretch, which increases the flow of blood. NO also keeps the smooth muscle cells younger and helps prevent and even reverse hardening and narrowing of the blood vessels over time. Proper diet (see more below) and regular exercise are key because both can boost NO.

Medications for erectile dysfunction don't work for everyone and may cause side effects that make a particular drug hard to take. "Work with your doctor to find the right treatment. There are still options for people who fail at medical treatment," advises Feloney. Alternatives to erectile dysfunction drugs include vacuum pump devices, medications injected into the penis, testosterone replacement if needed, and a surgical penile implant.
Content on this website is provided for information purposes only. Information about a therapy, service, product or treatment does not in any way endorse or support such therapy, service, product or treatment and is not intended to replace advice from your doctor or other registered health professional. The information and materials contained on this website are not intended to constitute a comprehensive guide concerning all aspects of the therapy, product or treatment described on the website. All users are urged to always seek advice from a registered health care professional for diagnosis and answers to their medical questions and to ascertain whether the particular therapy, service, product or treatment described on the website is suitable in their circumstances. The State of Victoria and the Department of Health & Human Services shall not bear any liability for reliance by any user on the materials contained on this website.
Booze. Most men have learned: One too many cocktails doesn’t improve performance; instead, it can have the opposite effect. During a recent study of 1,506 Chinese males, the men who drank three or more drinks a week were more likely to have ED or some form of sexual dysfunction. “Men may find that alcohol decreases social inhibition, which makes it easier to approach a woman,” says Montague. “But alcohol is a depressant, and at higher quantities it can reduce both a man’s desire and ability to perform.”
L-arginine is an amino acid that occurs naturally in the human body and helps make that magic nitric oxide so important for supporting an erection. A 1999 study observed the effects of six weeks of L-arginine administered daily among men with ED. One third of those who took five grams per day of L-arginine experienced significant improvements in sexual function.
Depression and anxiety: Psychological factors may be responsible for erectile dysfunction. These factors include stress, anxiety, guilt, depression, widower syndrome, low self-esteem, posttraumatic stress disorder, and fear of sexual failure (performance anxiety). It is also worth noting that many medications used for treatment of depression and other psychiatric disorders may cause erectile dysfunction or ejaculatory problems.
If the patient reports a history of trauma to the genitals that preceded his erectile dysfunction, further evaluation with pharmacologic injection and penile color duplex ultrasound (PCDU) would be indicated to assess for arterial insufficiency or venous occlusive dysfunction (19). Prior to PCDU, however, you might give him a trial of oral PDE5 inhibitors. If those medications are effective, you have effectively ruled out significant arterial insufficiency or venous leakage disease as an etiology. Regardless of outcome of PCDU, no surgical intervention would likely be offered to this man who responds well to oral agents.
Erectile dysfunction may be an unpleasant condition that no one really wants to talk about, failing to acknowledge it won’t make the problem go away. Your best defense against health problems like this is to learn everything you can about it so you can tackle the problem at the root. If you’re ready to stop living in embarrassment about your sexual function, become an advocate for yourself and your own health and talk to your doctor.
The first goal in treating ED is to manage your diabetes. This includes keeping your blood sugar and blood pressure under control. If ED persists, treatments are available. While oral medications are a common first therapy, they don’t work for all men with diabetes. The penile implant may be an option. The implant is concealed inside the body. It offers support for an erection whenever and wherever desired.
Rates of erectile dysfunction have significantly increased over the last 15 years, especially in men younger than 40. In 2002, a review of 23 studies from Europe, the United States, Asia and Australia found that the rate of erectile dysfunction in that age group was two per cent. More recent studies suggest that erectile dysfunction is becoming more prevalent in younger men, with as many as 15 per cent of men in that age group battling it.

ED usually has something physical behind it, particularly in older men. But psychological factors can be a factor in many cases of ED. Experts say stress, depression, poor self-esteem, and performance anxiety can short-circuit the process that leads to an erection. These factors can also make the problem worse in men whose ED stems from something physical.


Counselling or sex therapy (58% of people find this works for them) –mind-related causes of erectile dysfunction can affect anyone. They are more likely if you experience erectile dysfunction at a younger age. Talking to a counsellor or therapist can help some people overcome erectile dysfunction related to these problems, possibly for good. They can also help you if your erectile dysfunction is causing you stress, as this can make matters worse.
Dr. Jonas Bovijn is the co-first author of the study and is from the Big Data Institute at the University of Oxford. He said: “We know that there is observational evidence linking erectile dysfunction and type 2 diabetes, but until now there has not been definitive evidence to show that predisposition to type 2 diabetes causes erectile dysfunction.”
Intraurethral alprostadil (Muse) provides a less invasive alternative to intrapenile injection. It is a pellet that is inserted 5–10 min before intercourse, and its effects last for 1 h. The response rate is ∼50–60%. It can be used twice daily but is not recommended for use with pregnant partners. Complications of priapism and penile fibrosis are less common than after alprostadil given by penile injection. The cost is ∼$18–24 per treatment.
If the patient reports that PDE 5 inhibitors work poorly or inconsistently, we offer CIS to objectively assess erectile function and to provide diagnostic information. For the CIS, inject bimix (such as papaverine 30 mg/phentolamine 0.5 mg/mL—0.2–0.3 cc) and have the patient compress the injection site for 5 minutes. After 5 minutes, instruct the patient to self-stimulate, then assess his response to injection. One could also combine penile color duplex ultrasound (PCDU) with the CIS. However, PCDU is expensive, may not be covered by the patient’s insurance, and may require increased dosages of pharmacologic agents, such as trimix (papaverine 30 mg/phentolamine 0.5 mg/alprostadil 10 mg–0.5 cc) to obtain complete smooth muscle relaxation. This often requires reversal of erection using phenylephrine after the study. In rare patients who failed to achieve and maintain erection with 0.5 mL of trimix, we may proceed with pharmacologic cavernosography or pharmacologic arteriography depending on the results of PCDU.
Excess alcohol causes erectile dysfunction in a variety of ways. Have one too many, and it decreases the production of NO in your penis, decreasing blood flow. It can even prevent the prescription pills from working. A little alcohol may get you aroused, but a lot actually blunts desire in your brain and can make it hard to reach climax as well. Over time excess alcohol damages the nerves to the penis that trigger an erection, and eventually, when the liver gets damaged, testosterone levels plummet. If you drink, practice moderation.
Relationship problems often complicate erectile dysfunction. Improving your relationship may be part of the solution. It may be a good idea to get counseling together from a sex therapist, marriage counselor, or a medical specialist. "I almost always see couples together to discuss erectile dysfunction. It often turns out that both partners have issues regarding the sexual relationship and once they are out in the open, couples can work together on a more satisfying sexual experience," says Feloney.
Talk with your doctor before trying supplements for ED. They can contain 10 or more ingredients and may complicate other health conditions. Asian ginseng and ginkgo biloba (seen here) are popular, but there isn't a lot of good research on their effectiveness. Some men find that taking a DHEA supplement improves their ability to have an erection. Unfortunately, the long-term safety of DHEA supplements is unknown. Most doctors do not recommend using it.
Alprostadil should not be used in men with urethral stricture (scarring and narrowing of the tube that urine and the ejaculate pass through), balanitis (inflammation/infection of the glans [tip] of the penis, severe hypospadias (a condition where the opening of the urethra is not at the tip of the penis, rather on the underside of the penis), penile curvature (abnormal bend to the penis), and urethritis (inflammation/infection of the urethra).
The recommended starting dose of tadalafil for use as needed for most patients is 10 mg taken orally approximately one hour before sexual activity. A doctor may adjust the dose higher to 20 mg or lower to 5 mg depending on efficacy and side effects. Doctors recommended that patients take tadalafil no more frequently than once per day. Some patients can take tadalafil less frequently since the improvement in erectile function may last 36 hours. Patients may take tadalafil with or without food. Tadalafil is currently the only PDE5 inhibitor that is FDA-approved for daily use for erectile dysfunction and is available in 2.5 mg or 5 mg dosages for daily use.
Depression and anxiety: Psychological factors may be responsible for erectile dysfunction. These factors include stress, anxiety, guilt, depression, widower syndrome, low self-esteem, posttraumatic stress disorder, and fear of sexual failure (performance anxiety). It is also worth noting that many medications used for treatment of depression and other psychiatric disorders may cause erectile dysfunction or ejaculatory problems.
The vascular processes that produce an erection are controlled by the nervous system and certain prescription medications may have the side effect of interfering with necessary nerve signals. Among the possible culprits are a variety of stimulants, sedatives, diuretics, antihistamines, and drugs to treat high blood pressure, cancer, or depression. But never stop a medication unless your doctor tells you to. In addition, alcohol, tobacco, and illegal drugs, such as marijuana, may contribute to the dysfunction.
In many ways, performance anxiety becomes a self-fulfilling prophecy wherein you become nervous about being able to satisfy your partner and the nerves lead to sexual dysfunction. In many cases, performance anxiety is triggered by negative self-talk – worries about being able to achieve an erection, pleasing a partner, or ejaculating too early. If you have had erectile issues in the past, those experiences will add to the weight of performance anxiety.
Psychological causes are less common than we thought but more often the cause in younger men. Performance anxiety triggers the release of adrenaline. Adrenaline causes blood to flow TO the vital organs, such as the heart, lungs and brain, and AWAY from less vital structures like the fingers, toes and the penis. Our bodies do this to cope with the physical stress of a physical attack or physical challenge, but sexual anxiety also triggers this reflex.
Normal male sexual function requires a complex interaction of vascular, neurological, hormonal, and psychological systems. The initial obligatory event is acquisition and maintenance of an erect penis, which is a vascular phenomenon. Normal erections require blood flow into the corpora cavernosae and corpus spongiosum. As the blood accelerates, the pressure within the intracavernosal space increases dramatically to choke off penile venous outflow. This combination of increased intracavernosal blood flow and reduced venous outflow allows a man to acquire and maintain a firm erection.
There are four main prescription-only medicines which are used to treat erectile dysfunction in young men: Viagra (sildenafil), Cialis, Levitra and Spedra. You can purchase all of these erectile dysfunction medicines through our discreet online service. They all work in roughly the same way, by opening up the arteries which supply blood to the penis. This allows blood to fill the erectile tissue in the penis, and for an erection to be achieved and maintained.

When we say it’s a barometer of men’s health, it’s a signal. It’s an indicator that things may be right or not. And so when a man develops an erectile problem– and we’re talking about something that is occurring over time. It’s not something that just occurred overnight. When it occurs overnight, it’s more often than not a psychogenic, an anxiety reaction.
Erectile dysfunction related to medical/physical causes is often treatable but less commonly curable. In some cases of medication-induced erectile dysfunction, changes in medication may improve erections. Similarly, in men with a history of arterial trauma, surgical intervention can restore erectile dysfunction. In most cases of ED associated with a medical condition, treatment allows one to have an erection "on demand" or with the aid of medications/device (but not spontaneous).
Tadalafil (Cialis) is the third oral medicine approved by the U.S. FDA for the treatment of erectile dysfunction. Like sildenafil (Viagra) and vardenafil (Levitra), tadalafil inhibits PDE5 (as described earlier). Unlike the other PDE 5 inhibitors, patients should take tadalafil once daily and is approved for the treatment of BPH (benign enlargement of the prostate).
With all of that said, it should be clear that we lack evidence from nationally representative sex surveys to support claims about a massive increase in erectile difficulties among young men. It may be that reports of mild problems are increasing in this group (we need more data to know), but even if this is true, the data don’t suggest anything along the lines of, say, a 1000% increase.
Cultivating and maintaining a healthy relationship is not easy. It takes time to truly get to know someone and to trust them. If you and your partner are experiencing trouble with your relationship, it could very well bleed over into your sex life. It could also be the case that your erectile dysfunction is creating problems in the relationship – it is another example of the cycle of ED that can affect many different aspects of your life. Communication is the first step in resolving this particular cause for psychological ED but it is also one of the most difficult steps to take.
Many younger men are concerned that this will create a dependency on the medication.  However, you cannot become dependent because there is no tachyphylaxis to these medications.  This means, that unlike some other drugs (opiates, benzodiazepines) your body does not get used to these medications over time, so you won’t need to up the dosage over time to get the same effect.  In fact, we have found the opposite to be true.  Over time, many of our younger patients need less medication and need it less frequently.
In some cases, however, these drugs may be unsuitable for patients with heart disease. If you are considering one of these drugs and you have heart disease, as many diabetics do, be sure to tell your doctor. In rare cases, the pills may create “priapism,” a prolonged and painful erection lasting six hours or more (although reversible with prompt medical attention).
×