Herbal aphrodisiacs may reduce s3xual performance when mixed with drugs —Study

A major scientific study has raised fresh concern over the widespread use of herbal aphrodisiacs in Nigeria, warning that combining them with conventional drugs may actually reduce s3xual performance instead of enhancing it.

The research, published in the Annals of Complementary and Alternative Medicine, examined four commonly used natural libido boosters: onion, garlic, kola nut, and bitter kola. These are deeply rooted in traditional medicine and everyday diets and are widely believed to improve sexual desire and treat erectile dysfunction.

But the findings suggest a more complicated reality, one that challenges popular assumptions and raises new health questions.

In controlled laboratory experiments using male rats, researchers evaluated the aphrodisiac effects of onion, garlic, kola nut, and bitter kola by measuring key indicators such as mounting frequency, erection, and ejaculation timing.

Among the group, bitter kola showed the strongest and most consistent ability to enhance s3xual activity, outperforming garlic, kola nut, and onion. In some measures, its effects came close to those of testosterone, the standard drug used as a benchmark in the study.

Garlic and kola nut demonstrated moderate improvements, increasing s3xual frequency but producing less consistent results in performance timing. Onion, though still active, ranked lowest overall.

Despite these encouraging results, the researchers explained that none of these herbal aphrodisiacs matched the overall effectiveness of testosterone. They remain significantly less potent than established medical treatments.

Perhaps the most striking finding from the study is that combining conventional drugs with herbal remedies, a common practice among many users, often failed to enhance s3xual libido and, in some cases, actually reduced it.

When administered alongside testosterone, garlic and onion significantly inhibited the drug’s effects; kola nut showed mixed and unpredictable outcomes while bitter kola produced no meaningful improvement.

According to the researchers, this directly challenges the widespread assumption that combining herbal and pharmaceutical treatments will produce stronger or faster results. In fact, these mixtures interfere with how drugs work in the body, potentially cancelling out their benefits.

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Garlic and onion, both widely used in everyday diets, were found to enhance s3xual behaviour in a dose-dependent manner. Similarly, kola nut and bitter kola, commonly consumed in social and cultural settings, also showed measurable effects.

Across Nigeria and much of Africa, herbal aphrodisiacs are commonly used, often alongside prescription medications and without medical advice. In fact, many communities, traditional remedies are the first line of treatment.

Local delicacies and lifestyle habits also come into play. Foods like suya, a popular grilled meat often eaten with large quantities of onions, may inadvertently influence the effectiveness of medications when consumed alongside them.

Similarly, locally prepared herbal mixtures, sometimes marketed as sexual enhancers, are frequently used in combination with prescribed drugs. The study suggests that such practices should be approached with caution.

The study provides insights into why these plants produce aphrodisiac effects and why those effects differ.

Bitter kola appears to act as a direct sexual stimulant, enhancing both desire and performance. Its mechanism, however, is not yet fully understood and requires further investigation.

Garlic and onion are believed to influence blood circulation and hormonal activity, which may explain their moderate effects on sexual behaviour.

Kola nut, on the other hand, contains high levels of caffeine. While this can increase alertness and energy, the study suggests it may function more as a stimulant than a true libido enhancer.

The researchers said the findings raise broader concerns about the unregulated use of herbal medicines, particularly when combined with conventional treatments.

They warned that beyond reducing effectiveness, such interactions could have wider health implications, including delayed treatment, increased risk of complications, and potential toxicity in certain cases.

The researchers are urging caution among users and calling for more scientific studies to better understand the interactions between herbal and conventional medicines.

They emphasise that while traditional plants hold real therapeutic potential, their use must be guided by evidence rather than assumption.

“Natural products have contributed to some of the world’s most important medicines. But their safety and effectiveness depend on proper testing, correct dosing, and a clear understanding of how they interact with other treatments,” the study said.

For many consumers, the appeal of herbal aphrodisiacs lies in their accessibility, affordability, and cultural acceptance.

But the study offers a clear warning: combining these remedies with prescription drugs is not always harmless, and may, in fact, undermine the very results users are seeking.

Even though bitter kola may lead among the herbal aphrodisiacs studied, its effects fall short of modern medical treatments. More importantly, herbal aphrodisiacs like onion, garlic, kola nut, and bitter kola do have measurable effects on sexual performance. But they are not equal in strength, and their benefits are often limited.

More critically, combining them with conventional drugs does not guarantee better results. When it comes to sexual health, more is not always better and mixing remedies without proper guidance could come at a cost.