Is Blexten the same as Benadryl?

Could you please clarify if Blexten and Benadryl are interchangeable or if they are in fact two distinct medications? I'm curious to know if they share similar active ingredients or if they serve the same purpose. It's important for me to understand the differences, if any, before making a decision on which one to use. Additionally, is there any risk involved in substituting one for the other? Thank you for your time and assistance in this matter.