The NHS has issued an alert regarding a widely used heart medication, cautioning users to be vigilant for significant side effects, such as jaundice or persistent nosebleeds lasting up to ten minutes.

Propranolol, a beta blocker, plays a critical role in reducing heart rate and relaxing blood vessels, thereby decreasing blood pressure and the heart’s oxygen demand. Additionally, it can alleviate anxiety symptoms like tremors and excessive sweating, and it’s also used to prevent migraines. Although propranolol is only available by prescription, it is extensively utilized throughout the UK.

According to the Mirror, the British Heart Foundation indicates that over 50 million prescriptions for beta blockers, including propranolol, are issued annually in the UK. Typically, the medication is administered once daily and is available in both standard and slow-release formulations.

However, propranolol is not without its risks, as it may lead to adverse side effects. The NHS advises contacting 111 if patients detect any alarming symptoms related to their blood or kidney function.

The NHS explains: “As with any medication, propranolol can cause side effects in some individuals, although many experience no or only minor issues. Side effects usually diminish as the body adjusts to the drug.”

Common side effects may include headaches, fatigue, cold extremities, nausea, and abdominal discomfort. While the medication is generally suitable for those over 12 years old, the NHS recommends that patients with a history of conditions such as low blood pressure, heart failure, depression, or diabetes consult their healthcare provider before using propranolol.

Propranolol can trigger more serious side effects, including the whites of your eyes turning yellow, skin turning yellow and having pale poo or dark urine. The NHS also warns that some patients may have “nosebleeds that last for more than 10 minutes”, have unexplained bruising, or find that they bruise more easily than usual.

Anyone experiencing these symptoms should “tell a doctor or call 111 straight away”. The NHS also urges people to not uddenly stop taking propranolol without talking to your doctor first, because it could cause serious heart issues like chest pain or even a heart attack.