Yes, Esipram 10 (escitalopram) can occasionally cause side effects like muscle twitching, trembling, or unusual sensations, which can feel more noticeable when you are resting. While constant left-sided chest pain is less common and can sometimes be related to underlying anxiety, it is important to have your prescribing doctor evaluate these symptoms. Please do not stop taking your medication suddenly. Your doctor can gently guide you on whether to adjust your dose or try a different option to help you feel more comfortable.