Beta blockers should be used with caution or not at all in people with asthma because they can trigger asthma attacks and increase resistance to asthma drugs. Particular types of beta-blockers may be safer than others for people with asthma. Beta blockers appear to be safe in people with chronic pulmonary obstructive disorder (COPD), especially particularly beta-1 selective beta blockers. If you have diabetes, you may have to check your blood sugar more regularly as beta blockers can sometimes mask the signs of low glucose, such as rapid heat beat. Do not stop taking beta blockers too abruptly because that may increase your risk of a heart attack or another heart problem. It’s important to discuss the potential side effects of beta blockers with your doctor. You can also check the consumer medical information that provides detailed information about how beta blockers safely and properly.