<s>[INST] I was trying bisiprolol for my benign pvc s . I was experiencing a feeling of tightness in my bronchial tubes. I was upset to stop the medication because it worked so well. My doctor is sending me for a respiratory function test next week to be certain that I don t have asthma even though I have not been wheezing. Would there be a chance that I couldtake something for the bronchial side effects and go back on the bisiprolol? [/INST] Bisoprolol an othe such β blockers can cause constriction of bronchial tubes specially in individuals with hyperreactive airways or with asthma.. If you are found to be suffering from these you will need to be put on other medications for your PVC .. There are few safer β blockers which can be prescribed in few cases.. </s>