A handful of drugs genuinely increase sexual desire, but fewer than the supplement industry would have you believe, and almost all of them work best for people whose libido was suppressed by a specific, identifiable cause. The strongest evidence exists for testosterone therapy (in both men and women with documented hormonal deficits), two FDA-approved medications targeting brain chemistry in women, and certain off-label antidepressants. Beyond those, the picture gets murkier fast. Recreational drugs, herbal extracts, and over-the-counter “libido boosters” each have their own complicated stories, and the placebo effect in sexual desire research is large enough to cloud almost every trial ever run.
Why Brain Chemistry Matters More Than Any Single Pill
Sexual desire is not a single switch that gets flipped on or off. It runs on a balance between brain chemicals that push desire up and brain chemicals that tamp it down. Dopamine is the main accelerator. At the central level, dopamine and serotonin play significant roles in sexual response, with dopamine generally promoting desire and arousal while serotonin acts as a brake on sexual function in the brain.1Wiley Online Library. Neuroanatomy and function of human sexual behavior: A neglected or unknown issue? This is why most drugs that boost libido either raise dopamine activity, lower serotonin’s inhibitory effect, or both. It also explains why the most common medications that kill libido, like SSRIs, do so by flooding the brain with serotonin. Understanding that seesaw helps make sense of nearly everything below.
Testosterone Replacement for Men With Low Levels
Testosterone is the hormone most closely associated with sex drive in popular culture, and there is real evidence behind the association, but with a caveat. Testosterone replacement therapy works for men who have genuinely low testosterone levels (a condition called hypogonadism). A meta-analysis of randomized, placebo-controlled trials found that TRT produced a small but statistically significant increase in sexual desire, erectile function, and sexual satisfaction in hypogonadal men.2The Journal of Clinical Endocrinology & Metabolism. The Efficacy and Adverse Events of Testosterone Replacement Therapy in Hypogonadal Men: A Systematic Review and Meta-Analysis of Randomized, Placebo-Controlled Trials A separate analysis found that TRT improved sexual desire but not erectile function compared with placebo.3The Journal of Clinical Endocrinology and Metabolism. Effect of Testosterone Replacement Therapy on Sexual Function and Hypogonadal Symptoms in Men with Hypogonadism The takeaway from both: if your testosterone is low, replacement can meaningfully restore desire. The improvements are real but modest, and erections specifically may not improve as much as wanting sex does.
If your testosterone levels are already normal, supplementing extra testosterone is unlikely to supercharge your libido and carries cardiovascular and prostate risks that are not worth the gamble. The men who benefit are those whose desire dropped because their hormone levels dropped first.
Testosterone for Women
Testosterone is not just a male hormone. Women produce it in smaller amounts, and when levels fall, particularly after menopause or surgical removal of the ovaries, desire can plummet. This is where some of the clearest evidence for any desire-boosting treatment exists. A systematic review found that transdermal testosterone patches increased the frequency of sexual desire and satisfying sexual activity in both naturally and surgically menopausal women with low desire, and decreased personal distress. The evidence was rated high for short-term use, though less clear for long-term safety.4PubMed Central. Transdermal Testosterone in Female Hypoactive Sexual Desire Disorder: A Rapid Qualitative Systematic Review Using Grading of Recommendations Assessment, Development and Evaluation
In a large trial of postmenopausal women not taking estrogen, the higher dose of transdermal testosterone (300 micrograms per day) led to an increase of about 2.1 satisfying sexual episodes per four-week period, compared with 0.7 for placebo. Both doses tested were associated with significant increases in desire and decreases in distress. The main side effect at the higher dose was unwanted hair growth, reported in about 30% of women.5PubMed. Testosterone for Low Libido in Postmenopausal Women Not Taking Estrogen A separate analysis confirmed clinically meaningful improvements in satisfying sexual activity, desire, and personal distress in surgically menopausal women with low desire.6PubMed. Evaluation of the clinical relevance of benefits associated with transdermal testosterone treatment in postmenopausal women with hypoactive sexual desire disorder
No testosterone product is currently FDA-approved for women in the United States, though off-label prescribing is common and several international guidelines endorse short-term use for postmenopausal women with distressing low desire. The gap between the evidence (reasonably strong for short-term use) and regulatory approval (nonexistent) is one of the stranger situations in sexual medicine.
FDA-Approved Drugs for Low Desire in Women
Two medications have been approved in the U.S. specifically for low sexual desire in premenopausal women, and both have been controversial since the day they were approved.
Flibanserin (brand name Addyi) is a daily pill that acts on the serotonin system. It works as an agonist at one type of serotonin receptor and an antagonist at another, shifting the balance of brain chemistry in a way that reduces serotonin’s inhibitory grip on desire.7PubMed. Mechanism of action of flibanserin, a multifunctional serotonin agonist and antagonist (MSAA), in hypoactive sexual desire disorder In trials, it produced a modest increase in desire and satisfying sexual events compared to placebo, but the effect was small enough that critics questioned whether it passed a meaningful clinical bar. You cannot drink alcohol while taking it due to a risk of dangerous drops in blood pressure, and it takes weeks of daily use to see any effect.
Bremelanotide (brand name Vyleesi) works through a completely different pathway. It is a melanocortin receptor agonist, meaning it activates receptors in the brain involved in sexual motivation. Given by self-injection about 45 minutes before anticipated sexual activity, early trials showed that more women reported moderate or high sexual desire after treatment compared with placebo.8PubMed. An effect on the subjective sexual response in premenopausal women with sexual arousal disorder by bremelanotide (PT-141), a melanocortin receptor agonist However, a re-analysis of the Phase III trials raised pointed concerns: adverse-event-related dropout was dramatically higher on bremelanotide, and when researchers looked at who completed the trials and chose to continue in follow-up studies, participants actually preferred placebo to the drug. The re-analysis characterized the drug’s benefits as modest and on measures of questionable validity.9PubMed. Re-Analyzing Phase III Bremelanotide Trials for “Hypoactive Sexual Desire Disorder” in Women Nausea is the most common side effect, affecting roughly 40% of users, which helps explain why many stop taking it.
The honest picture: both drugs exist, both are legal, and both have real but underwhelming effects for most users. If you try one and it works for you, that is a genuine win. But the average effect sizes in trials are modest enough that many women try them and feel little difference.
Bupropion and Other Off-Label Options
Some of the most interesting evidence for boosting desire comes from drugs that were never designed for that purpose. Bupropion, an antidepressant that works primarily by increasing dopamine and norepinephrine rather than serotonin, is the standout here. A systematic review and meta-analysis found that bupropion was roughly three-fold more favorable than placebo in improving problems with sexual desire in women.10PubMed Central. The Role of Bupropion in the Treatment of Women with Sexual Desire Disorder: A Systematic Review and Meta-Analysis Bupropion is also commonly used to counteract the libido-killing effects of SSRI antidepressants, and many clinicians reach for it as a first-line option when a patient reports that their antidepressant has flattened their sex drive.
The reason bupropion works where SSRIs fail ties back to that dopamine-serotonin seesaw. SSRIs flood the brain with serotonin, which suppresses desire as a side effect. The sexual problems SSRIs cause range from decreased desire and excitement to diminished or delayed orgasm and erection difficulties.11PubMed Central. Antidepressant-associated sexual dysfunction: impact, effects, and treatment Bupropion, by boosting dopamine instead, avoids this problem and can even reverse it.
Dopamine agonists, a class of drugs used to treat Parkinson’s disease and restless legs syndrome, are another accidental libido-booster. Pramipexole, for instance, has been documented to cause compulsive sexual behavior in some patients, including compulsive masturbation.12PubMed Central. Pramipexole and compulsive masturbation This is listed as a side effect rather than a therapeutic use, and for good reason: the hypersexuality these drugs produce can become uncontrollable and distressing. It is compelling evidence that directly stimulating dopamine pathways increases desire, but it is not a viable treatment strategy for low libido.
Methylphenidate (Ritalin, Concerta), a stimulant used for ADHD, also has documented effects on sexual arousal. In one controlled study, a 40 mg dose increased sexual arousal in response to explicit visual stimuli, and participants actively sought to extend their viewing time of sexual images.13PubMed. Effects of methylphenidate and MDMA on appraisal of erotic stimuli and intimate relationships Case reports have also described improvements in libido and erectile function when methylphenidate was added to antidepressant treatment.14PubMed Central. Use of Methylphenidate in Coexisting Major Depression, Loss of Libido and Erectile Dysfunction Again, these are not mainstream prescriptions for low desire, but they reinforce the pattern: drugs that boost dopamine tend to boost wanting.
Herbal Supplements and What the Evidence Actually Shows
Walk into any supplement store and you will find dozens of products claiming to boost libido with “natural” ingredients. The evidence behind most of them ranges from thin to nonexistent, but a few have been tested in real trials.
Maca (Lepidium meyenii), a root vegetable from the Peruvian Andes, is probably the most studied. In healthy men, an improvement in sexual desire appeared after eight weeks of maca treatment, and the effect was independent of any change in testosterone, estrogen, depression, or anxiety scores.15PubMed. Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men This finding has been replicated in later trials, and the interesting part is that maca does not appear to work by changing hormone levels at all. Neither total testosterone nor free testosterone differed between maca and placebo groups in a randomized trial of men with symptoms of low testosterone.16PubMed Central. Efficacy and Safety of Maca (Lepidium meyenii) in Patients with Symptoms of Late-Onset Hypogonadism: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial A separate study confirmed that maca had no effect on serum reproductive hormone levels.17PubMed. Effect of Lepidium meyenii (Maca), a root with aphrodisiac and fertility-enhancing properties, on serum reproductive hormone levels in adult healthy men So if maca does improve desire, which a few small trials suggest, it is doing so through some mechanism other than hormones. What that mechanism is remains unclear, and the trials have generally been small.
Tribulus terrestris, a plant extract marketed heavily as a testosterone booster, has some evidence for sexual function in women. A meta-analysis found that it significantly improved overall sexual function, desire, and arousal compared to placebo in female populations.18PubMed. Beneficial effects of natural products on female sexual dysfunction: A systematic review and meta-analysis Panax ginseng was also effective for arousal and desire in women in the same meta-analysis. A combination of ginseng, tribulus, and L-arginine improved sexual function scores in men with erectile dysfunction in a randomized trial.19PubMed Central. The Effect of the Combination of Ginseng, Tribulus Terrestris, and L-arginine on the Sexual Performance of Men with Erectile Dysfunction But these trials tend to be small, and the supplement industry’s quality control problems make it hard to know whether any given product contains what the label claims.
Recreational Drugs and the Desire-Performance Split
Several recreational substances are widely reported to increase feelings of desire, but the evidence consistently shows a frustrating split: the drugs that make you want sex often make it harder to actually have it.
Cannabis is probably the most commonly used recreational substance in sexual contexts. A review of the evidence found that lower doses appear linked to heightened desire and enjoyment, while higher doses may decrease both desire and performance. People who use cannabis more frequently also tend to report higher levels of sexual activity, though untangling cause from effect is difficult.20SpringerLink / Psychopharmacology. Update on cannabis in human sexuality The dose-dependent pattern matters: a small amount before sex is a very different experience than being heavily stoned.
MDMA (ecstasy, molly) is famous for producing feelings of emotional closeness and sensual enhancement. In studies, more than 90% of users reported that desire and satisfaction were moderately to profoundly increased. But orgasm was delayed, and erection was impaired in 40% of men.21PubMed. Subjective effects of MDMA (‘Ecstasy’) on human sexual function The neurochemistry explains the paradox: MDMA generates roughly equivalent surges of both dopamine (which promotes desire) and serotonin (which inhibits performance), unlike most stimulants that lean heavily toward dopamine.22The Journal of Sexual Medicine. ‘Ecstasy’ – Accurate or Deceptive Name? A Systematic Review of MDMA Effects on the Male Sexual Response Cycle The serotonin flood also triggers prolactin release, which may mimic the post-orgasmic state and further suppress drive during the acute effects.23PubMed. Ecstasy (MDMA) mimics the post-orgasmic state: impairment of sexual drive and function during acute MDMA-effects may be due to increased prolactin secretion Many users report feeling intensely connected and sensual on MDMA but unable to perform sexually until the drug wears off.
Alcohol follows a similar pattern. In women, alcohol consumption increases subjective sexual desire, arousal, and pleasure while simultaneously lowering physiological arousal.24PubMed. Women, alcohol, and sexuality In men, the same basic principle holds: a drink or two may lower inhibition and increase the feeling of wanting, while heavier drinking progressively impairs erections and delays orgasm. Shakespeare nailed it centuries ago with his observation that drink “provokes the desire but takes away the performance.”
Alkyl nitrites, commonly known as poppers, are used for their short-acting blood-vessel-dilating properties and are widely reported to enhance the physical sensations of sex, particularly anal intercourse. They are not so much desire boosters as they are sensation amplifiers, relaxing smooth muscle and producing a brief rush.
The Placebo Problem
One of the most striking findings in sexual desire research is how strongly people respond to placebo. In trials for women’s sexual dysfunction, placebo recipients typically reported statistically significant improvements on one or more major endpoints compared to their baseline. The within-group effect sizes were predominantly moderate, meaning the improvement from simply being in a study and taking a sugar pill was not trivial.25Journal of Sex and Marital Therapy. Placebo response in the treatment of women’s sexual dysfunctions: A review and commentary Postmenopausal women and women with low desire appeared especially likely to respond to placebo treatment.
Why would a fake pill improve your sex life? The explanations are more practical than mystical. Being enrolled in a trial means you are thinking about sex more. You are tracking your desire and your sexual activity. You may be discussing sex more openly with a partner. The instructions, behavioral changes, and interactions with study staff all influence expectations and therefore responses.26PubMed. Listening to placebo in clinical trials for female sexual dysfunction Changes in relationship adjustment also predicted the magnitude of improvement in one study, meaning that if the relationship got better during the trial, so did the sex, regardless of whether the pill was real.27PubMed Central. Correlates of Placebo Response in the Treatment of Sexual Dysfunction in Women: A Preliminary Report
This does not mean sexual desire drugs are useless. It means that any drug’s effect has to be judged against an already-moving baseline. When you hear that a drug increased satisfying sexual events by two episodes per month, remember that placebo often increased them by one. The drug’s actual contribution above and beyond simply paying attention to your sex life may be smaller than you would guess from the headline number.
Oxytocin and the Bonding Angle
Oxytocin, sometimes called the “love hormone,” has been tested as a potential enhancer of sexual experience. The results are interesting but not what most people expect. In couples, intranasal oxytocin did not alter sexual drive, arousal, or the physical mechanics of sex. What it did affect was the experience of orgasm and connection afterward: intensity of orgasm increased, contentment after sex increased, and some participants reported better ability to share desires with their partner. The effects were more pronounced in men.28PubMed. Differential effects of intranasal oxytocin on sexual experiences and partner interactions in couples In a study of men alone, the effects on sexual behavior were described as equivocal, though subjects who received oxytocin could tell it was not placebo, suggesting some altered perception of arousal even without clear behavioral changes.29PubMed. The acute effects of intranasal oxytocin administration on endocrine and sexual function in males
So oxytocin is not a desire drug. It does not make you want sex. What it may do is make the sex you are already having feel more emotionally rich and physically intense, especially in the context of an existing relationship. That is a different kind of enhancement, and for some people it may be the more valuable one.
When the Real Fix Is Stopping a Drug, Not Starting One
For a significant number of people struggling with low desire, the culprit is a medication they are already taking. SSRIs are the most common offenders: the sexual side effects range from decreased desire to diminished orgasm to erectile problems, and they affect a large percentage of users.11PubMed Central. Antidepressant-associated sexual dysfunction: impact, effects, and treatment Other common libido-dampeners include certain blood pressure medications, hormonal contraceptives for some women, antihistamines, and opioids.
If you had a healthy sex drive before starting a medication and noticed it disappearing afterward, the most effective “drug that makes you horny” might be switching to a different one. Moving from an SSRI to bupropion, for instance, often restores desire because you are simultaneously removing the serotonin-driven brake and adding a dopamine-driven accelerator. Dose reductions, drug holidays (under medical supervision), and add-on therapies are other strategies clinicians use. Before you start stacking supplements or seeking new prescriptions, it is worth asking whether the thing you are taking every day is the thing that is working against you.
Birth control pills deserve a specific mention because the effect is less widely recognized. Hormonal contraceptives suppress ovarian testosterone production. For most women this causes no noticeable change, but a subset experience a real drop in desire that resolves when they switch to a non-hormonal method. It is not universal, but it is common enough that it should be on the checklist.
Desire Versus Performance
One of the biggest confusions in this whole space is the difference between wanting sex and being able to have it. Drugs like sildenafil (Viagra) and tadalafil (Cialis) are sometimes described colloquially as making people “horny,” but they do nothing whatsoever to desire. They increase blood flow to the genitals, making erections possible when the plumbing was not cooperating. If the desire is there but the body is not responding, these drugs solve the problem. If the desire is not there, they will give you an erection you did not particularly want.
The distinction matters because many people who search for something to boost their libido actually need one or the other, not both. Someone whose antidepressant has killed their interest in sex does not need Viagra; they need a medication change or the addition of bupropion. Someone who wants sex but has trouble maintaining an erection does not need testosterone or flibanserin; they need a PDE5 inhibitor. Conflating the two leads to people taking the wrong drug for the wrong problem and concluding that nothing works.
Among recreational drugs, you see the same split played out dramatically. Stimulants like methamphetamine are notorious for producing intense sexual compulsivity, but the evidence discussed above with methylphenidate, a much milder dopamine booster, confirms the general principle: pharmacological stimulation of dopamine enhances wanting.13PubMed. Effects of methylphenidate and MDMA on appraisal of erotic stimuli and intimate relationships Meanwhile MDMA enhances emotional closeness and sensuality while impairing the mechanical aspects of sex. Cannabis, at low doses, seems to blur the line by increasing both subjective desire and subjective enjoyment without necessarily impairing function, which may explain why it is the recreational substance most consistently rated positively in sexual contexts.