<s>[INST] Hello over the last couple of weeks I have been drinking an expresso americano decaf coffee.I switched over from a regular decaf coffee and now I have been experiencing heart palpations, a bit of dizziness and pains in my calf muscle when walking. What should i do about this? [/INST] HiT hank you for asking Chat Doctor. I have gone through your query. You should check your blood pressure and pulse rate. High blood pressure can give a palpitation. It is better to avoid coffee as whole if you're having palpitation. Even though caffeine content is less there are other contents which can cause palpitation in coffee. You can have chamomile tea which gives you relaxation. You can also do deep breathing exercises for relaxation. If that is not helping then a short course of anxiolytic like alprazolam or beta blockers like metoprolol in small dose will be helpful. Hope this may help you. Let me know if anything is not clear. Thanks. </s>