I have been put on anxiety medication , I was some Lexapro for 3 years and I took myself off due to weight gain, then I just recently had to go to the doctor because I was feeling anxiety especially at night. Can this medication cause my heart to race. I am currently on Buspar 20 mg a day and Venlafaxine 37.5 mg once a day. I refuse to pay 115.00 for the doctors to answer me and to maybe change the meds again but my heart rate has gone from 54 to 68 so was just concerned. Also suffer from chronic neck pain and I have read that this can cause increase in heart rate. I am already a member for this I will not pay 15.00 again for I didn t receive an answer from the first question I asked a month or so ago.