What Are Beta Blockers?

Beta blockers are medicines that slow your heart rate and reduce how hard it has to work. They’re often prescribed for heart problems, high blood pressure, and sometimes for symptoms of anxiety like trembling or a racing heart.

When Are Beta Blockers Used?

They’re most commonly prescribed for:

• High blood pressure (hypertension)
• Heart failure or irregular heart rhythms (arrhythmias)
• Angina (chest pain caused by reduced blood flow to the heart)
• Recovery after a heart attack
• Physical symptoms of anxiety (fast heart rate, sweating, shaking)
• Other conditions like migraines or an overactive thyroid

How Do Beta Blockers Work?

Beta blockers work by blocking the effects of stress hormones like adrenaline on your heart and blood vessels. This:

• Slows your heart rate
• Lowers your blood pressure
• Reduces the heart’s workload
• Helps stop physical anxiety symptoms (like palpitations and shaking)

Types of Beta Blockers

There are several types of beta blockers. Some are “selective” (mainly affect the heart) while others are “non-selective” (affect other parts of the body too). Common ones include:

• Propranolol (often used for anxiety symptoms)
• Atenolol
• Bisoprolol
• Metoprolol
• Nadolol

How Are Beta Blockers Taken?

Most beta blockers are taken as tablets once or twice a day. Your doctor may start you on a low dose and increase it slowly. They should explain how and when to take them, and how long you might need to stay on them.

Possible Side Effects

Not everyone gets side effects, but some people experience:

• Tiredness or low energy
• Dizziness or lightheadedness
• Cold hands and feet
• Slow heartbeat
• Upset stomach or diarrhoea
• Vivid dreams or trouble sleeping (more common with propranolol)

Speak to your doctor if these are severe or don’t improve. Do not stop beta blockers suddenly — this can cause serious heart problems.

Who Shouldn’t Take Beta Blockers?

Beta blockers aren’t suitable for everyone. Tell your doctor if you have:

• Asthma or breathing problems
• Very low blood pressure
• Certain heart conditions like severe bradycardia (very slow heart rate)
• Circulation problems (like severe Raynaud’s)

Important Things to Know

• Don’t stop beta blockers suddenly without medical advice.
• They may make you feel more tired at first, but this often improves.
• If you take them for anxiety, they help with physical symptoms, not the underlying thoughts or feelings.
• Your doctor may combine them with other medicines depending on why you’re taking them.