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是ta-blockers are a group of medicines that are used to treat a variety of conditions related to your heart.

What do beta-blockers do?

是ta-blockers are a group of medicines that slow your heart rate and lower your blood pressure, making it easier for your heart to pump blood. They are used to treat a variety of conditions related to your heart such as:

control of heart rhythm disorders (atrial fibrillation)
to treat心脏衰竭
to lower the chance of anotherheart attack(myocardial infarction) if you've already had one
preventing胸痛(angina)
to treat高血压.

β受体阻滞剂也用于其他条件，例如：

减少震颤
reducing symptoms ofanxietysuch as fast heart rate
preventingmigraineheadaches
glaucoma，随着β受体阻滞剂的眼睛下降以降低眼睛的压力。

The following animation describes how beta-blockers work in the body (British Heart Foundation)

β受体阻滞剂的例子

There are several beta-blockers and each is a bit different. Your doctor will advise which one is best for you.

β受体阻滞剂的例子
阿替洛尔索托洛 celiprolol 卡维迪洛(Dilatrend®)	labetalol（Hybloc®） metoprolol(Betaloc CR®, Lopresor®, Slow Lopresor®) Bisoproll(Bosvate®)

Precautions before taking beta-blockers

您是否患有哮喘或其他呼吸问题，例如COPD（慢性阻塞性肺疾病）？
你有糖尿病吗？
Do you have low blood pressure?
Do you have very slow heart rate?
Are pregnant or breastfeeding?

If so, it’s important that you tell your doctor or pharmacist before you start beta-blockers. Sometimes a medicine isn’t suitable for a person with certain conditions, or it can only be used with extra care.

How to take beta-blockers

When you first starting taking a beta-blocker, your doctor will start you on a low dose then slowly increase it over a few weeks. It can take a while for you to feel better – usually a few months.

Do not suddenly stop taking your beta-blocker

不要突然停止在不先与医生交谈的情况下接您的β受体阻滞剂。这可能是危险的，使您感到不适。您可能会感觉到心跳变化（快速，快速，不规则或有力的心跳），血压升高和胸痛的恢复。如果您确实需要停止服用β受体阻滞剂，那么您的医生可能会建议减少剂量的缓慢。

What are the side effects of beta blockers?

When you first start taking a beta-blocker or get your dose increased you may feel tired or have other side effects for a few days. These side effects usually slowly go away with time.

糖尿病

If you have diabetes you need to take extra care to measure your blood glucose levels regularly.

是ta-blockers can cause an increase in blood glucose levels, especially when you first start taking them. This effect usually settles with time.
是ta-blockers may reduce the warning signs of a low blood sugar level (hypoglycaemia – often called a hypo). For example, you may not have the feeling of fast, irregular or strong heartbeats (palpitations) or tremor, which can occur when your blood glucose is going too low. If you are worried about this, talk to your doctor. Do not stop taking your beta-blocker without checking with your doctor first. Read more abouthypoglycaemia.

Asthma

If you have asthma, taking a beta-blocker may trigger your asthma symptoms or make them worse. Not everybody with asthma is sensitive to these medicines.如果您担心这一点，请与您的医生交谈。他们可能能够开一些不同的药物或增加预防药物的剂量。不要突然停止在不先与医生交谈的情况下接您的β受体阻滞剂。这可能是危险的，使您感到不适。阅读更多有关medicines that may trigger asthma symptoms.

Other possible side effects

副作用	我应该怎么办？
These are quite common when you first start taking a beta-blocker, and usually go away with time. cold hands and feet dizziness, tiredness constipation or diarrhoea depression and low mood nightmares or sleep problems sexual problems nausea	Tell your doctor if they do not go away or are troublesome for you.
If you get any of these symptoms: 呼吸问题，例如胸部紧绷或喘息脚或腿肿胀感觉像是晕倒胸痛 changes in heart rate (fast, slow or irregular)	Tell your doctor immediately or ring HealthLine 0800 611 116.
您是否知道可以向Carm（不良反应监测中心）向药物报告副作用？向产品报告副作用

副作用

我应该怎么办？

These are quite common when you first start taking a beta-blocker, and usually go away with time.