Clarifying Vital Elements For testosterone therapy

A Harvard expert shares his thoughts on testosterone-replacement Treatment

It could be said that testosterone is the thing that makes men, guys. It gives them their characteristic deep voices, large muscles, and body and facial hair, distinguishing them from girls. It stimulates the development of the genitals at puberty, plays a role in sperm production, fuels libido, and leads to normal erections. Additionally, it boosts the production of red blood cells, boosts mood, and assists cognition.

Over time, the testicular"machinery" which makes testosterone slowly becomes less powerful, and testosterone levels start to fall, by approximately 1% a year, starting in the 40s. As men get into their 50s, 60s, and beyond, they might begin to have signs and symptoms of low testosterone like reduced sex drive and sense of energy, erectile dysfunction, decreased energy, reduced muscle mass and bone density, and nausea. Taken together, these signs and symptoms are often called hypogonadism ("hypo" significance low working and"gonadism" referring to the testicles). Yet it is an underdiagnosed problem, with just about 5 percent of those affected receiving treatment.

But little consensus exists about what constitutes low testosterone, when testosterone supplementation makes sense, or what risks patients face. Much of the current debate focuses on the long-held belief that testosterone can stimulate prostate cancer.

Dr. Abraham Morgentaler, an associate professor of surgery at Harvard Medical School and the director of Men's Health Boston, specializes in treating prostate ailments and male sexual and reproductive difficulties. He has developed specific experience in treating lower testosterone levels. In this interview, Dr. Morgentaler shares his views on current controversies, the treatment strategies he uses with his own patients, and why he believes specialists should rethink the potential connection between testosterone-replacement therapy and prostate cancer.

Symptoms and diagnosis

What signs and symptoms of low testosterone prompt the average man to see a doctor?

As a urologist, I tend to see guys since they have sexual complaints. The main hallmark of reduced testosterone is reduced sexual libido or desire, but another can be erectile dysfunction, and any man who complains of erectile dysfunction should get his testosterone level checked. Men may experience other symptoms, such as more difficulty achieving an orgasm, less-intense orgasms, a smaller amount of fluid from ejaculation, and a feeling of numbness in the penis when they see or experience something that would normally be arousing.

The more of these symptoms there are, the more likely it is that a man has low testosterone. Many physicians tend to dismiss those"soft symptoms" as a normal part of aging, however, they're often treatable and reversible by decreasing testosterone levels.

Are not those the very same symptoms that guys have when they are treated for benign prostatic hyperplasia, or BPH?

Not precisely. There are a number of drugs that may lessen sex drive, including the BPH drugs finasteride (Proscar) and dutasteride (Avodart). Those drugs can also reduce the quantity of the ejaculatory fluid, no wonder. However a reduction in orgasm intensity usually does not go along with therapy for BPH. Erectile dysfunction does not ordinarily go together with it , though surely if a person has less sex drive or less attention, it is more of a challenge to get a good erection.

How do you determine if or not a man is a candidate for testosterone-replacement therapy?

There are two ways that we determine whether someone has reduced testosterone. One is a blood test and the other one is by characteristic signs and symptoms, and the correlation between those two methods is far from ideal. Normally guys with the lowest testosterone have the most symptoms and men with highest testosterone have the least. However, there are a number of men who have low levels of testosterone in their blood and have no symptoms.

Looking at the biochemical numbers, The Endocrine Society* considers low testosterone for a entire testosterone level of less than 300 ng/dl, and I believe that's a reasonable guide. However, no one really agrees on a number. It's similar to diabetes, in which if your fasting sugar is over a certain level, they will say,"Okay, you've got it." With testosterone, that break point is not quite as clear.

*Notice: The Endocrine Society recommends clinical practice guidelines with recommendations for who should and shouldn't receive testosterone therapy. Watch"Endocrine Society recommendations summarized."

Is complete testosterone the right point to be measuring? Or if we are measuring something else?

This is another area of confusion and great discussion, but I don't think that it's as confusing as it is apparently in the literature. When most physicians learned about testosterone in medical school, they learned about overall testosterone, or all the testosterone in the human body. However, about half of the testosterone that is circulating in the bloodstream isn't available to cells. It's closely bound to a carrier molecule called sex hormone--binding globulin, which we abbreviate as SHBG.

The available portion of total testosterone is known as free testosterone, and it's readily available to cells. Even though it's just a small portion of the overall, the free testosterone level is a pretty good indicator of reduced testosterone. It's not ideal, but the correlation is greater compared to total testosterone.

Endocrine Society recommendations outlined

This professional organization recommends testosterone treatment for men who have both

Therapy is not Suggested for men who have

  • Breast or prostate cancer
  • a nodule on the prostate that may be felt during a DRE
  • a PSA higher than 3 ng/ml without further evaluation
  • that a hematocrit greater than 50% or thick, viscous blood
  • untreated obstructive sleep apnea
  • severe lower urinary tract infections
  • class III or IV heart Discover More Here failure.

    Do time daily, diet, or other factors influence testosterone levels?

    For years, the recommendation has been to receive a testosterone value early in the morning because levels start to fall after 10 or 11 a.m.. However, the information behind that recommendation were attracted to healthy young men. Two recent studies demonstrated little change in blood testosterone levels in men 40 and mature over the course of this day. One reported no change in typical testosterone until after 2 p.m. Between 6 and 2 p.m., it went down by 13 percent, a modest sum, and probably insufficient to influence identification. Most guidelines still say it's important to perform the evaluation in the morning, but for men 40 and above, it likely does not matter much, as long as they get their blood drawn before 6 or 5 p.m.

    There are a number of very interesting findings about dietary supplements. By way of instance, it seems that individuals who have a diet low in protein have lower testosterone levels than men who eat more protein. But diet hasn't been studied thoroughly enough to make any recommendations that are clear.

    In the following guide, testosterone-replacement treatment refers to the treatment of hypogonadism with exogenous testosterone -- testosterone that is manufactured outside the body. Based upon the formula, therapy can cause skin irritation, breast tenderness and enlargement, sleep apnea, acne, decreased sperm count, increased red blood cell count, along with other side effects.

    At a recent prospective study, 36 hypogonadal men took a daily dose of clomiphene citrate for at least three months. Within four to six weeks, all of the men had increased levels of testosteronenone reported some side effects during the year they had been followed.

    Since clomiphene citrate isn't accepted by the FDA for use in males, little information exists regarding the long-term ramifications of carrying it (such as the probability of developing prostate cancer) or if it's more capable of boosting testosterone compared to exogenous formulas. But unlike adrenal gland, clomiphene citrate preserves -- and possibly enhances -- sperm production. That makes drugs like clomiphene citrate one of just a few options for men with low testosterone that wish to father children.

    What forms of testosterone-replacement therapy are available? *

    The earliest form is the injection, which we use because it's cheap and since we faithfully become good testosterone levels in nearly everybody. The drawback is that a person should come in every few weeks to get a shot. A roller-coaster effect can also happen as blood glucose levels peak and then return to baseline.

    Topical treatments help preserve a more uniform level of blood testosterone. The first kind of topical treatment was a patch, but it has a very high rate of skin irritation. In 1 study, as many as 40 percent of men who used the patch developed a red area on their skin. That restricts its use.

    The most commonly used testosterone preparation from the United States -- and also the one I start almost everyone off -- is a topical gel. The gel comes in miniature tubes or within a special dispenser, and you rub it on your shoulders or upper arms once a day. Based on my experience, it has a tendency to be consumed to good degrees in about 80% to 85 percent of men, but leaves a substantial number who don't consume enough for it to have a favorable effect. [For specifics on several different formulations, see table below.]

    Are there any drawbacks to using dyes? How long does it take for them to get the job done?

    Men who start using the implants need to return in to have their testosterone levels measured again to be sure they're absorbing the proper amount. Our goal is the mid to upper assortment of normal, which usually means around 500 to 600 ng/dl. The concentration of testosterone in blood really goes up quite fast, within several doses. I usually measure it after 2 weeks, although symptoms may not change for a month or two.

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