<s>[INST] Hi. Since last week I ve been feeling spasms in my chest followed by a warm rush of blood sensation. I actually went to emergency because of this and was admitted to hospital for a few days with tachycardia. They reduced my heart rate with beta blockers but never addressed theses spasm sensations which are more disturbing to me than the fast pulse. [/INST] Thanks for your question on Chat Doctor. I can understand your situation and problem. Betablockers are known to cause bronchospasm. Beta receptors in bronchi are needed for bronchodilator, Especially beta 2 receptors. So whenever nonselective beta blockers are given, they will block the action of beta 2 mediated bronchodilator and cause bronchospasm. So better to start cardio selective beta blocker (beta 1 selective). It Is having only beta 1 action and no action on beta 2 receptors in bronchi, So no bronchospasm. Beta 1 receptors are present in heart so beta 1 antagonist (cardio selective beta blocker) will have effect only on heart. So consult your cardiologist and change to cardio selective beta blocker. </s>