###Human: Can Z-pack increase your heart rate and cause anxiety? ###Assistant: Hello, Greetings from icliniq. I understand that you are worried about the side effect of the prescribed drug. In my opinion, Azithromycin is one of safe drugs, so do take the medicine without any doubt. Secondly, I would like to know your history in detail. And last but not least, according to me its a good time to give a thought about quitting smoking. And I can help you. Do let me know. Take care. Spirometry testing with bronchodilator reversibility testing allergic bronchitis, bronchial asthma worsening due to smoking Smoking cessation. When investigations are available and then as required.