No, paracetamol will not prevent pregnancy.
Paracetamol, also known as Panadol, Tylenol and by a range of other brand names, is a commonly used medicine for pain, headaches and fevers. However it has no impact on the female reproductive system and will not increase or decrease the chances of falling pregnant.
Paracetamol should always be used according to the directions or in consultation with a medical professional. Taking too higher dose can result in liver failure and other health complications.
Some studies have shown a small increase in male and female infertility when the drug is taken during pregnancy although these findings aren’t conclusive. However this is only applicable if you’re already pregnant, or if your mother took Paracetamol during pregnancy.