Iâ€™ve been taking 400/12 Symbicort for two years on the recommendation of well known chest prof and one who I trust for severe atopic asthma symptom relief and overall asthma control. This combination drug has really helped me concerning daytime control of asthma symptoms. I still have a big problem during the early hours if not taking pred (I am atm â€“ taking pred) but this is not my major concern.
What does worry me is that I've recently started to experience a noticeably increased heart rate at various times of the day for no apparent reason, i.e. can happen whether Iâ€™m driving to work and back, sitting in front of my computer, walking around or standing up in front of students. This symptom appears out of the blue for want of a better expression, lasting for anything between ten minutes and up to an hour.
Iâ€™m used to the â€˜shakesâ€™ at certain times, mostly during warm weather and lasting a short time, when taking this med, plus have a similar response to high doses of bricanyl and ventolin nebs when experiencing asthma exacerbations.
Iâ€™m not sure but have a gut feeling that the increased heart rate â€“ which makes me feel extremely tired and sleepy - to the point where I have to sit down and rest, especially if my heart rate is increased for an hour - is related to the LABA part of this inhaler.
Iâ€™m relatively fit -can run - albeit slowly these days, have never smoked, normal blood pressure, not overweight, healthy diet â€“ apart from daily G and G choccy supplement - and so on.
This increase in heart rate is totally different to the way I used to feel when running and training to deliberately increase heart rate for improved aerobic endurance. Never experienced the extreme tiredness or out of the blue increased heart rate. (Iâ€™m an experienced - 25 year - former marathon and ultra distance runner)
Obviously I will discuss this concern with chest doc, but wonâ€™t see him again for another four weeks.
Has anyone experienced this or similar symptoms? Better still, can anyone explain why Iâ€™m experiencing this symptom and whether or not it is something to worry about?