Male Sex Drive and Drugs

Douglas G.Adler in Discover magazine, explores the effect of Finasteride on the male sex drive. October 2020.

Reggie, a 30-year-old pharmaceutical salesman, appeared in my office one afternoon to follow up on his cholesterol levels and other routine bloodwork. While the tests were all normal, I noticed he seemed to be in a bit of a funk, for lack of a more scientific term. Ordinarily an upbeat and positive person, he seemed to be down in the dumps. When I asked if anything was going on at home or at work, he said everything was fine. Still, he couldn’t deny that he did not feel like himself.

“It’s hard to describe,” he told me. “Everything is fine, and I should feel fine, but I don’t. My marriage is fine, my kids are doing well in school, and I have money in the bank.” Nonetheless, Reggie told me that sometimes he got confused for no reason and he felt tired all the time. Plus, his muscles and joints ached. “It all came on out of nowhere a few weeks ago and I can’t seem to shake it,” he continued. “At first, I thought I had the flu, but I don’t.”

I immediately thought he may have thyroid troubles. The thyroid gland, located in the neck, produces a hormone known as thyroxine, which has a profound effect on a person’s overall metabolic rate. When the thyroid gland produces too little thyroxine — a condition known as hypothyroidism — patients often describe a similar set of symptoms. Confident that I had nailed the diagnosis, I ordered blood tests to check his thyroid. A few days later, the results came back, and I was stunned to see they were perfectly normal. Scratching my head, I asked Reggie to return to my clinic for more tests.

He told me his symptoms had not improved. He’d had an episode of what he called “brain fog” on an important conference call for work, performed poorly and been deeply embarrassed. I asked about any other symptoms he hadn’t mentioned before. He told me that “nothing was fun anymore.” Movies and TV shows that he liked now bored him, and music that he usually liked listening to sounded grating to his ears.

When people don’t experience pleasure, it is known as anhedonia — often a sign of depression. But Reggie insisted he didn’t feel sad in the usual sense of the word. “I don’t feel sad or depressed,” he told me. “I just don’t feel anything at all.” Lastly, in hushed tones, Reggie said he was having trouble getting and maintaining erections, something he had never experienced before. “I feel like an 80-year-old man in a 30-year-old body,” he lamented.

Changes in mood and sex drive can sometimes suggest a neurologic problem. But Reggie’s neurologic exam was normal. To be safe, I ordered a CT scan of his brain; it was also perfectly normal. One evening, I was alone in my office and thinking about possible side effects. I went through his list of medications, one by one, and saw nothing worrisome until I noticed something: A few months ago, Reggie had started taking finasteride.

Hormones: Helpful and Harmful

Finasteride is a 5-alpha reductase inhibitor; these types of drugs can affect the way hormones are processed and transformed by our bodies. The male sex hormone testosterone helps men build muscle and have a healthy sex drive, but it also produces hair loss in genetically susceptible individuals. Finasteride blocks the conversion of testosterone to its more potent cousin, dihydrotestosterone (DHT). High levels of DHT can cause hair loss, so drugs that halt that hormone’s production can help combat it.

Finasteride was first marketed over 20 years ago as a treatment for urinary symptoms in men with enlarged prostate glands. Since then, the drug has also found use as a treatment for male pattern baldness. Many men who are losing their hair can slow — or even reverse — the process by taking a much lower dose of finasteride than is used to treat an enlarged prostate.

Reggie had obtained his finasteride from an online pharmacy after he’d noticed his hair was falling out and became worried about his appearance. Since taking the drug, his hair loss had largely stopped. In addition, he told me that he was definitely starting to see some new hair growth — a welcome sight.

But finasteride, while highly effective, is also a controversial drug. Not long after it was released commercially, some users began to complain of a plethora of symptoms not unlike Reggie’s. Patients could develop neurologic, sexual, emotional and musculoskeletal symptoms that, strangely, sometimes persisted for months or even years after stopping the drug. When symptoms continue even after stopping finasteride, patients are referred to as having post-finasteride syndrome, or PFS.

The fact that the most common side effects from the drug are sexual — and that these could be long-lasting — has scared many patients off from even trying it to treat hair loss. The medical literature on finasteride is also far from clear; some studies of finasteride have documented these side effects, but others have not. Plus, patients who have good results on finasteride swear by it in online hair loss forums, while those who feel it has harmed them deride it as poison on those same sites.

Most men who take finasteride have no side effects at all. And those who do develop issues usually see them resolve after stopping the drug. Still, some who take finasteride do experience long-lasting side effects.

Read more :https://www.discovermagazine.com/health/he-became-depressed-and-his-sex-drive-disappeared-what-was-the-cause

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