Researchers have found that a common drug used to treat hay fever may have an unexpected effect on the sex lives of some users.
A number of people who take a type of antihistamine, which is also used to treat insomnia, have reported that this drug has had a noticeable effect on their libido, in some cases reaching a level comparable to drugs like Viagra.
The results show that these over-the-counter medications, used by millions worldwide, may be linked to increased sexual arousal, sensitivity, and pleasure in some users. One study participant said the effect was so strong that he felt physically and mentally exhausted.
The drug in question is centered around "Diphenhydramine Hydrochloride" (DPH), an antihistamine commonly used to treat allergy symptoms. It is also an ingredient in well-known drugs such as "Naitol Original," "Boots Sleep Ease," and "Hystergan," and is also used to treat insect bites and eczema.
These findings are surprising, as this drug is typically associated with side effects such as drowsiness or erectile dysfunction, not increased libido. However, the researchers found that in some cases it may facilitate sexual arousal and increase sensitivity and pleasure during orgasm.
The reason why its effect varies from person to person is still unclear, but one hypothesis suggests that the way the body metabolizes the drug may play a role, as its effect can shift from sedative to stimulant in some people.
The study was based on the opinions of nine people aged between 20 and 36 who had discussed in an online forum their experience of increased sexual arousal after taking the medication. The sample included individuals who typically suffered from low libido, as well as a woman who was taking antidepressants that usually negatively affect sexual desire, but who said that diphenhydramine helped her overcome this effect.
Some participants compared the effects of this drug to drugs like Viagra, noting that the latter improves physical performance, while "Diphenhydramine"—as they described it—provides an improvement in sensation and pleasure.
