I have a severe cough, blowing nose constantly, clear, able to sleep, starts the instant my feet hit the floor, driving everyone crazy that hears me. Was given samples of Liquibid PD-R which contains guaifenesin 400 mg and phenylephrine 5 mg. Took my first pill in the evening and the next morning I totally changed for the better - all the mucus was cleared, coughing stopped, etc. My problem is I am unable to purchase the medication. The doctor that provided me with the samples has not suggested what I need to do. HELP! I also take Pantoprazole for acid reflux, and breast cancer drug - aromason, blood pressure medication. Could there be a problem with Pantoprazole. Do you have a source for Liquibid PD-R? Thanks for your help.