The NHS has issued an alert for anyone taking a widely used heart medication. People are being advised to watch for serious warning signs, including yellowing of the skin or “nosebleeds lasting more than 10 minutes.”What Is Propranolol?Propranolol is a beta blocker that slows the heart rate and relaxes blood vessels, helping lower blood pressure and reduce the heart’s oxygen demand. It is also prescribed to ease symptoms of anxiety, such as trembling or excessive sweating, and can help prevent migraines. The medication is prescription-only but is commonly prescribed throughout the UK.According to the Mirror, the British Heart Foundation reports that more than 50 million beta blocker prescriptions are issued in the UK each year, including for propranolol. Patients usually take it once a day, in either a standard or slow-release form.While propranolol is generally safe, it does carry possible side effects. The NHS advises contacting 111 immediately if serious symptoms affecting the blood or kidneys appear.The NHS notes: “Like all medicines, propranolol can cause side effects in some people, but many experience none or only minor effects. Side effects often ease as your body adjusts to the medication.”Propranolol Side EffectsCommon side effects include headaches, fatigue, weakness, cold fingers or toes, nausea, and stomach discomfort. While most people over 12 can safely take propranolol, the NHS recommends consulting a doctor first if you have a history of low blood pressure, heart failure, depression, or diabetes.More serious reactions can occur, including yellowing of the eyes or skin, pale stools, or dark urine. The NHS also warns of nosebleeds lasting longer than 10 minutes, unexplained bruising, or increased tendency to bruise easily.Anyone experiencing these warning signs should contact a doctor or call 111 immediately. The NHS also cautions against stopping propranolol abruptly without medical guidance, as this could trigger severe heart problems, including chest pain or even a heart attack.Who Should Be Extra Cautious With PropranololWhile propranolol is widely prescribed and generally safe for most adults, certain people need to monitor themselves more closely or consult their doctor before use. Those with low blood pressure, heart failure, slow heart rates, diabetes, respiratory conditions like asthma, or a history of depression may face higher risks of side effects. Pregnant or breastfeeding women should also speak to a healthcare professional before taking the medication. The NHS emphasizes that even minor symptoms—like unusual fatigue, dizziness, or cold hands and feet—should not be ignored, especially if they worsen over time. Monitoring for these effects early can prevent more serious complications.Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you experience any side effects or unusual symptoms while taking propranolol or any other prescription medicine, seek medical attention immediately.