<s>[INST] hi i am having heart palpitaion some time once a week tor some time one in a month dr prescribed me calaptin 40 1tb daily after staring this tab i have problem in sleeping and feeling hot i check my bp its normal but when i am going to bed after 1n hour sleep i wake up due to feeling hot  thanks [/INST] helloI have gone through your query.Thanks for using HCM.first of all you should have ECG exactly at a time when you have palpitation going.If you have SVT on ECG then you may continue Calaptin,Otherwise you should first find out cause of palpitation ,I suggest you to get Thyroid functions test done.This may give us clue to diagnosis and further line of treatmentMy best wishesDr.Rajesh Teli,MD. </s>