The symptoms such as the ones you are describing are non-specific and can be due to a number of conditions, some of which are
- cardiac (angina, myocardial infarction),
- endocrine disorders( ex; hyperthyroidism),
- drug induced,etc.
Before jumping to any conclusions, the first question one should try to answer is, "is this related to bronchial asthma or or its treatment?"
Your symptoms can very well be explained by adverse effects that may occur during regular usage of salbutamol. Salbutamol may cause the following less serious side effects..
- dryness of mouth/throat
- throat irritation,
- insomnia, or
More serious side effects such as
- chest pain &
- irregularities of cardiac rhythm also occasionally occur.
As you have indicated that you are using salbutamol inhaler only on a
prn(as needed) basis,it can be safely ruled out as the cause.
So, i feel that you should consult your doctor and have the cardiac causes excluded as a priority.
MB BS, MS, FRCS(Edinburgh)