I have gas x. from 2009 is it safe to take now in 2021 thanks?

Expired medication is likely to be less effective than fresh medication. While I am not aware of harmful effects of expired Gas-Ex, it is likely that the risk of harm outweighs the likelihood of usefulness. Please obtain fresh medication and properly dispose of the expired pills.

Common sense alone would lead one to the conclusion that taking medications that have been expired for a prolonged period isn't prudent.