question: i have just started using ventilin several times a day as I was getting a bit breathless  I am now getting very cold and starting to shake I have taken Advil  and after about an hour or so break out in huge sweats for about an hour  It has been happening couple of times thru the day and night also feel a bit lethargic for the last four days.  I have seen a doctor and was sent off to emergency. My heart, blood pressure was good   It was the hospital suggested I use ventilin. why would I be shivering and sweating many thanks