Heart rate 55 is 55 beats per minute. A heart rate of 55 beats per minute after taking metoprolol tartrate may be due to a high dose of the drug and is related to the individual’s constitution. You can reduce the dose or stop the drug, promote metabolism, gastric lavage and other methods. 1. Reduce the dose or stop the drug: Metoprolol tartrate is a β1 receptor blocker, which can be used to treat hypertension, angina pectoris, myocardial infarction, arrhythmia and other diseases by lowering the heart rate, lowering the blood pressure and slowing down conduction. The heart rate is 55 beats per minute after taking metoprolol tartrate. Consider the dose is large, you can follow the doctor’s advice to reduce or stop the drug. 2. Promote metabolism: The normal range of heart rate in quiet state is 60 to 100 beats per minute. The heart rate of 55 beats per minute after taking metoprolol tartrate, if there are no uncomfortable symptoms, you can drink more water to promote the metabolism of the drug. 3. Gastric lavage: taking metoprolol tartrate heart rate 55 beats per minute if it is mistakenly taken too large a dose, may further reduce the heart rate, or even shock or death. You can also go to the hospital to wash your stomach to quickly remove the drug from your body. If you experience a heart rate of 55 beats per minute after taking metoprolol tartrate, you need to go to the hospital as soon as possible and take treatment measures under the guidance of your doctor.