Is It Safe To Take Delsym For Cough And Cold?

Hello - I was diagnosed 35 years ago with hypothyroidism. I take levothyroxine. I also have borderline high blood pressure and take a low dose of enelapril maleate. Am I able to take Delsym Cough and Cold? I have a nasty cold and a persistent cough. I'm seeing my doctor on Tuesday but was hoping to quiet my cough and clear my sinuses with the Delsym...