text: If you take too much psuedophed for your sniffles, your body will become dependent on the drug. When you stop taking the psuedophederin, you will have a case of sinus congestion you have never known before.\nThe doctor will X-ray your face and see all the congestion and unless another drug such as anti-biotic does not clear it up, he will have to drill holes in your face to drain the sinus