Yes, medications can affect male fertility, and a 2023 review in Nature Reviews Urology estimated that up to 25% of male infertility cases may have a medication-related component that goes unrecognized. Common culprits include testosterone therapy, SSRIs, opioids, and certain blood pressure drugs, though most effects are reversible once the medication is stopped or changed.
Yes, they can. And it's a question more men should be asking.
Most conversations about male fertility focus on the obvious factors: heat, alcohol, smoking, age. But there's a less discussed variable sitting in your medicine cabinet. A 2023 review in Nature Reviews Urology estimated that up to 25% of male infertility cases may have a medication-related component that goes unrecognized.
The tricky part: many of these medications are prescribed for legitimate health conditions. The goal here isn't to scare you off necessary treatments. It's to make you aware so you can have an informed conversation with your doctor if fertility is on your radar.
How medications interfere with sperm production
Sperm production (spermatogenesis) takes roughly 64 to 72 days. During that window, the testicles run a finely tuned biological process that depends on specific hormone signals, temperature regulation, and cellular machinery. Medications can disrupt this process in three main ways:
- Hormonal disruption — Some drugs suppress the pituitary gland's production of LH and FSH, the hormones that tell your testicles to make testosterone and sperm. Without those signals, production slows or stops.
- Direct cellular damage — Certain compounds are toxic to the cells that produce sperm, damaging them at the DNA level or killing them outright.
- Sperm function impairment — Some medications don't stop sperm production but affect how sperm move (motility) or their ability to fertilize an egg.
The effect is usually reversible once the medication is stopped, but recovery can take three months or longer — that's how long a full sperm production cycle takes.
The major categories to know about
Testosterone and anabolic steroids
This is the most common medication-related cause of male infertility, and it's often overlooked because men don't think of testosterone as a "drug."
When you take exogenous testosterone — whether through injections, gels, or pellets — your brain detects the elevated levels and stops producing the signals (GnRH, LH, FSH) that drive natural testosterone and sperm production. Sperm production drops dramatically, often to zero.
Research published in Fertility and Sterility (2019) found that testosterone therapy caused azoospermia (no measurable sperm) in over 90% of men within four to six months. The good news: it's usually reversible. Studies show that 70% of men regain sperm production within 12 months of stopping, though some take longer.
If you're on testosterone therapy and planning to conceive, talk to your doctor about alternatives like hCG (human chorionic gonadotropin) or HMG (human menopausal gonadotropin), which can maintain sperm production while still treating low testosterone symptoms. Do not stop testosterone cold turkey without medical supervision.
What this means for you: If you're using testosterone or anabolic steroids and fertility matters to you, this needs to be addressed before you try to conceive. Some men find that switching to a different protocol preserves fertility. Others need to come off entirely for a period.
Selective serotonin reuptake inhibitors (SSRIs)
SSRIs like sertraline (Zoloft), fluoxetine (Prozac), and paroxetine (Paxil) are among the most prescribed medications in the United States. They're effective for depression and anxiety. They also affect sperm.
A 2019 meta-analysis in The World Journal of Men's Health found that SSRIs were associated with increased sperm DNA fragmentation — basically, more broken strands of genetic material. High DNA fragmentation is linked to lower fertilization rates and higher miscarriage risk.
The effect appears to be dose-dependent and may be more pronounced with certain SSRIs like paroxetine. Sperm count and motility can also take a hit.
Most men on SSRIs don't have fertility problems, and untreated depression itself can negatively affect sperm quality through elevated cortisol and poor lifestyle habits. The risk-benefit calculation is personal and should involve your prescribing doctor and a reproductive specialist if you're actively trying to conceive.
What this means for you: Do not stop an SSRI abruptly. Withdrawal can be severe. But if you're planning to start a family, ask your doctor whether switching medications or adjusting your dose makes sense. Some men time their SSRI use so they're on the lowest effective dose during the conception window.
Opioids
Opioid pain medications — including prescription drugs like oxycodone, hydrocodone, and morphine — suppress the hypothalamic-pituitary-gonadal axis. This means they lower testosterone and stop sperm production.
Chronic opioid use is associated with hypogonadism in 50% to 80% of men, depending on the dose and duration. The effect can persist for months after stopping.
This is especially relevant given the ongoing opioid crisis. If you're on long-term opioid therapy for chronic pain and fertility is a concern, this conversation needs to happen with your doctor.
Blood pressure medications
Calcium channel blockers, commonly prescribed for hypertension, have been linked to sperm function issues. Specifically, they can interfere with the ability of sperm to penetrate an egg by affecting the "acrosome reaction" — the process where sperm releases enzymes to break through the egg's outer layer.
A study in Fertility and Sterility (1995) found that men taking calcium channel blockers had sperm that performed poorly in fertilization assays, even though count and motility looked normal. The effect reversed when the medication was stopped.
Other blood pressure drugs, like beta-blockers, have less clear effects. ACE inhibitors and ARBs appear to have minimal impact on fertility.
What this means for you: If you're on calcium channel blockers and struggling to conceive, this is worth raising with your doctor. There are multiple classes of blood pressure medication, and switching may be an option.
Chemotherapy and radiation
This is the heavy one. Chemotherapy drugs, particularly alkylating agents like cyclophosphamide, can permanently damage sperm production. The testicles are highly sensitive to these treatments.
Sperm banking before cancer treatment is standard practice, and any man facing chemotherapy or radiation to the pelvic area should discuss this with his oncologist immediately. Even if you're not thinking about children now, banking sperm provides insurance for the future.
Other medications with documented effects
- Finasteride and dutasteride (hair loss and BPH medications) — These drugs block the conversion of testosterone to DHT. Some men experience reversible declines in sperm count. Research is mixed, but a 2018 study in The Journal of Urology found that 5% of men on finasteride had significant sperm count reductions.
- Sulfasalazine (for inflammatory bowel disease) — Causes reversible reductions in sperm count and motility in most men. Switching to mesalamine often resolves the issue.
- Corticosteroids — Long-term, high-dose use can suppress the HPG axis. Short-term use appears safe.
- Antifungals — Ketoconazole, in particular, can lower testosterone production.
- Cimetidine (for heartburn) — An older medication that can interfere with sperm production. Modern alternatives like omeprazole don't have the same effect.
- Antipsychotics — Many raise prolactin levels, which suppresses GnRH and reduces sperm production.
What to do if you're concerned
If you're taking any medication and planning to conceive, here's the practical path:
- Make a list of every medication you take, including over-the-counter drugs, supplements, and anything topical.
- Ask your doctor two questions: "Could this medication affect my fertility?" and "Is there an alternative with fewer reproductive side effects that would work for my condition?"
- Get a baseline semen analysis if you're actively trying. This gives you and your doctor data to work with.
- Consider timing. If a medication is short-term, you may choose to wait three months after stopping before trying. If it's long-term, explore alternatives.
- Don't stop medications on your own. The risks of untreated depression, uncontrolled hypertension, or chronic pain likely outweigh the fertility concerns. Work with your doctor to find the right balance.
The bottom line
Medications can affect male fertility, and the effects are more common than most men realize. But awareness is power. Most medication-related fertility issues are reversible once the drug is stopped or changed. And in many cases, there are effective alternatives that don't carry the same risks.
Frequently asked questions
Can testosterone therapy make you infertile?
Testosterone therapy is the most common medication-related cause of male infertility. When you take exogenous testosterone, your brain stops sending the signals that drive natural sperm production, and a study published in Fertility and Sterility in 2019 found it caused azoospermia in over 90% of men within four to six months. The good news is that studies show 70% of men regain sperm production within 12 months of stopping, though some take longer. Alternatives like hCG or HMG can maintain sperm production while still treating low testosterone symptoms.
Do antidepressants affect male fertility?
SSRIs can affect sperm quality, particularly by increasing DNA fragmentation, which is linked to lower fertilization rates and higher miscarriage risk. A 2019 meta-analysis in The World Journal of Men's Health found this association, with the effect appearing dose-dependent and potentially more pronounced with paroxetine. Most men on SSRIs don't experience fertility problems, and untreated depression itself can negatively affect sperm quality, so any changes should be discussed with a doctor rather than stopping medication abruptly.
Can blood pressure medication affect sperm?
Calcium channel blockers, commonly prescribed for hypertension, can interfere with the ability of sperm to penetrate an egg by affecting the acrosome reaction. A study in Fertility and Sterility from 1995 found that men taking calcium channel blockers had sperm that performed poorly in fertilization assays even when count and motility looked normal, and the effect reversed when the medication was stopped. If you're on calcium channel blockers and struggling to conceive, ask your doctor whether switching to a different class of blood pressure medication is an option.
How long does it take for sperm to recover after stopping a medication?
Sperm production takes roughly 64 to 72 days, so recovery after stopping a medication generally takes at least three months and sometimes longer. For testosterone therapy specifically, studies show most men regain sperm production within 12 months of stopping, though some take longer. Because the effects are tied to a full sperm production cycle, doctors often recommend waiting three months after stopping a short-term medication before trying to conceive.