The author of the study points to the fact that a flawless result of the study has not been derived yet which can successfully explain the effects of long-term, constant as well as high-dosage exposure of ibuprofen on the body.
This study also looked at a couple of other hormones produced by the testes and found that they, too, were reduced by ibuprofen.
Dr Kristensen added: "These drugs are so common in modern society, that many people take them for granted".
Within just two weeks, it seems that the testosterone-producing hormones in the subjects became linked to the amount of ibuprofen in their blood.
OTC medicines have been found to have drawbacks
While this effect wasn't permanent, the researchers warned that prolonged use of ibuprofen by men could lead to low testosterone production - which might end up harming their fertility.
Since the study was conducted over a short period of time, coauthor Bernard Jégou explained that the participants can recover from the condition.
Again, it's important to emphasize this was a really small study that required two weeks of constant ibuprofen use before there was any indication that something was out of the ordinary. So, for the time being, I would urge men who need to take ibuprofen to continue to do so.
However, for men, it could compromise their ability to procreate, a new study suggests.
Ibuprofen has a negative impact on the testicles of young men, a study published Monday in the journal Proceedings of the National Academy of Sciences found. However, it remains unknown whether the health effects of long-term ibuprofen use are reversible, he said.
But long-distance runners and athletes who regularly take ibuprofen during training or sports matches in order to ward off inflammation may want to keep an eye on the research.
Researchers looked at 31 male participants and found that taking ibuprofen reduced production of testosterone by almost a quarter in the space of around six weeks.