Can second hand smoking daily trigger seizures in those with epilepsy?

It is not clear if second smoke can trigger the amount of seizures a person with epilepsy has, but on the other hand, there is more risk of getting seizures with people who are chronic smokers, with babies of mothers who smoke, and with those exposed to second hand smoke in general. So you need to avoid being around smoke to try to prevent getting seizures in the first place

Smoking does indeed produce multiple toxic gases, BUT there is no scientific evidence that it will trigger additional seizures in well-controlled epileptics. Regardless, avoid smoke, either first-hand or second-hand.