If the blood pressure is relatively low feel heartbeat can not sleep because of overwork, low blood sugar, heart disease, insomnia and so on. You can supplement sugar, metoprolol, ivabradine hydrochloride, digoxin, oxazepam and so on. 1. Overexertion: If you have been under stress and too much physical activity recently, this condition will occur for a short period of time, and will get better after resting, and you may not need to take medication. 2. Hypoglycemia: Lower blood sugar will appear fast heartbeat and low blood pressure, which will affect sleep. You need to replenish sugar in time, and pay attention to rest can be relieved. 3. Heart disease: reduce the heart rate can take medication β-blocker, metoprolol, propranolol, etc., water and sodium retention combined with heart failure can be oral digoxin tablets can be added with ivabradine tablets. 4. Insomnia: suffering from insomnia will have a nervous system instability, resulting in lower blood pressure, faster heart rate, can not sleep, you can take medication oxazepam, zopiclone and so on. It can also be combined with psychotherapy. Drugs should be used under the guidance of a physician.