What Causes Numbness On The Left Side Of The Face And Lips While On Buckley S Cold Relief?

I think I maybe having a mild allergic reaction to Buckley s cough and chest congestion medicine. the left side of my face feels a little tingly and on that same side my lib is numb. This is the only thing I have taken out of the ordinary. I started to use this early Saturday morning, 10 ml and on Sunday, another 5ml for early symptoms for a mild sinus issue. I noticed my lip was lazy on the left side this morning. Thought maybe I bit it while in my sleep but also recalled noticing it a little limp yesterday while putting on lipstick but thought nothing of it. I m convinced that this Buckley s cough and chest congestion is the culprit because it s my first time using it. My mother had Bell s Pausey many, many (25+) years ago so I wanted you to know about that as well. I ve taken a benedrgyl in hopes that all this will clear up. Can you help me with some advice? Thanks Patricia