Ramipril, a widely prescribed medication in the UK for treating high blood pressure, heart failure, and preventing strokes, may cause a rare but serious side-effect causing sudden swelling of the lips, tongue, or throat, according to pharmacist Raj R Patel. Despite millions of people taking ramipril safely-over 35 million prescriptions are dispensed annually-the risk of this adverse reaction remains present at any time during treatment.
In a recent social media post, Raj Patel explained that while ramipril is generally well tolerated, it can trigger angioedema, a condition characterised by rapid swelling beneath the skin, particularly around the mouth and throat. He emphasised that angioedema linked to ACE inhibitors like ramipril can arise unpredictably, including after years of uneventful use. Cases in the UK have documented angioedema developing after five years on the medication.
Although angioedema is uncommon, Patel warned of its potentially life-threatening implications if it obstructs the airway. He advised patients to heed emergency symptoms such as swelling affecting breathing or swallowing and to call 999 immediately if these occur.
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The NHS describes ramipril as a prescription-only drug that widens blood vessels and assists heart function, thereby reducing risks of strokes, heart attacks, and kidney issues. It also highlights other common side-effects including cough, headache, and sickness.
Patel pointed out that angioedema differs from the more familiar dry cough associated with ramipril, as it does not present with typical allergic symptoms like itchy rashes. The mechanism involves the accumulation of bradykinin, a molecule normally broken down by angiotensin-converting enzyme (ACE). Ramipril’s inhibition of ACE can allow bradykinin to build up in susceptible individuals, leading to swelling.
He urged anyone suspecting ACE-inhibitor angioedema to discontinue ramipril immediately and seek prompt medical evaluation before resuming the medication. The UK prescribing guidelines recommend urgent treatment in such cases.
In addition to angioedema, the NHS lists other common side-effects of ramipril and stresses the importance of contacting healthcare professionals promptly if less common or severe reactions arise. Serious allergic reactions such as anaphylaxis require immediate emergency care via 999, and patients are advised not to drive themselves to hospital.
Overall, while ramipril remains an effective and important medication for cardiovascular health, awareness of this rare but urgent side-effect is crucial for patient safety.