Call your doctor right away if you have chest pain or a very slow heartbeat (less than 50 heartbeats per minute). Can I take a beta blocker if I have diabetes? Yes, you can take a beta blocker if you have diabetes. But a beta blocker may hide some of the warning signs of low blood sugar. For example, when you take a beta blocker, your heart rate may not increase in response to a low blood sugar level. You will need to check your blood sugar levels carefully after you start taking a beta blocker. If you have low blood sugar often, your doctor may want to change the dosages of your diabetes medicine. Can I take a beta blocker if I have asthma or chronic lung disease? Beta blockers are generally not used in people with asthma. A beta blocker can cause asthma attacks. Sometimes people with a chronic lung disease such as emphysema or bronchitis can take beta blockers. If you have lung disease and are taking a beta blocker, call your doctor right away if you start having breathing problems.Here is some useful information on the different types of medication you may be prescribed, side effects of each and general info on your prescription. The drugs are listed with their Generic name (or you can just search the page for the drug you are taking).