I do not see anything wrong trying the store brand cough drops till the time they work well. I purchased the Cvs cough drops in Lemon and honey flavor, and if I am not wrong these were the first ones I had in this flavor, which I really liked. The honey and lemon together is so soothing for the rough throat. While this drop is in the mouth you feel so good, no cough and everything seems easy. It leaves a cooling effect even after it is finished but cough starts again the moment that essence goes off. It is fine for temporarily relief throughout the day, on the go, when you can not have those drowsy syrups which makes you feel sleepy. The best part about these are they are Sugar free that I believe is good for Diabetics as well. I have used these tablets while I had little cough, so honestly can not comment on how it would work for anyone with severe cough and congestion.