Although they do not have approval from the Food and Drug Administration FDA for treating anxiety, doctors may prescribe them off-label for this purpose. However, beta-blockers cannot treat anxiety itself. Other treatments, such as counseling, can help address the underlying causes of anxiety. Beta-blockers can reduce symptoms such as tremor and a rapid heart rate in people with an overactive thyroid.
They do this by blocking the action of thyroid hormone in the bloodstream. Beta-blockers help manage a range of conditions by blocking beta receptors, which occur throughout the body.
There are three types of beta receptor:. Beta-blockers can also be selective or non-selective. Selective beta-blockers mostly target the heart, while non-selective ones manage symptoms in other parts of the body. Here are some common types and brands of beta-blockers:.
Beta-blockers affect receptors throughout the body and can have a range of side effects , including:. There is also a risk of heart block , especially in people with heart disease. People should advise their doctor if they have a history of any of the following before taking beta-blockers:. Those who have a heart condition or chest pain and a history of cocaine use should talk with their doctor before using beta-blockers.
This is because there is some debate about whether or not it is safe to use them in these circumstances. People with diabetes , especially hypoglycemia , should monitor their blood sugar regularly. This is because beta-blockers can obstruct signs of low blood sugar, such as a rapid heartbeat.
Some types of beta-blocker may be safe to use during pregnancy if a doctor advises it. The doctor can advise on which beta-blockers are suitable for an individual to use after considering their full medical history. L-arginine is an amino acid that helps produce nitric oxide NO , which can cause blood vessels to enlarge and may help lower blood pressure.
Research has shown that increased L-arginine levels can also reduce hypertension in rats. Sources of L-arginine include:. Adequate levels of potassium in the diet can help to keep blood pressure levels low. Many people can get more than enough potassium from a well-balanced diet.
Low fat dairy products, fish, bananas, and potatoes are a few good sources of potassium. Garlic has a long history of use as a potent antioxidant and anti-inflammatory. Many studies have shown that garlic can significantly reduce blood pressure.
It also has similar benefits for other conditions that beta-blockers treat, such as heart disease. Research suggests that hawthorn may have a positive effect on blood pressure and heart rhythm, and may even be able to help manage the symptoms of heart failure. Rauwolfia is a traditional herbal supplement used for the treatment of hypertension. It contains tryptophan derivatives called indole alkaloids. Red yeast rice is popular herbal supplement for cardiovascular disease that contains substances called monacolins.
One in particular, Monacolin K, works much like a statin a drug that lowers cholesterol and is the most well-studied compound in red yeast rice. In one clinical trial from , researchers found that a mixture of red yeast rice and olive oil was able to improve lipid profiles in participants with metabolic syndrome. Consult with your doctor before taking red yeast rice since it may have side effects similar to those caused by statin drugs.
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They are prescription-only medicines, which means they can only be prescribed by a GP or another suitably qualified healthcare professional. Less commonly, beta blockers are used to prevent migraine or treat:. There are several types of beta blocker, and each one has its own characteristics. The type prescribed for you will depend on your health condition. Beta blockers are not suitable for everyone. To make sure they are safe for you, tell your doctor before starting a beta blocker if you have:.
Tell your doctor if you're trying to get pregnant, are already pregnant or breastfeeding. It's important not to stop taking beta blockers without seeking your doctor's advice.
In some cases suddenly stopping the medicine may make your health condition worse. There are some medicines that may interfere with the way that beta blockers, including beta blocker eyedrops, work. Most people taking beta blockers have either no or very mild side effects that become less troublesome with time.
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