High blood pressure at night combined with a rapid heart rate can take betalac to lower blood pressure and lower heart rate at the same time. Betalac is a beta-blocker that can inhibit sympathetic excitation and lower the ventricular rate, thus playing a role in lowering blood pressure. Betalac has a weak blood pressure-lowering effect and is mainly used to lower the heart rate. If the blood pressure is high at night, it is recommended to use calcium channel blockers, such as nifedipine controlled-release tablets or amlodipine to lower blood pressure, and also angiotensin-converting enzyme inhibitors, such as benazepril to lower blood pressure.