Propranolol for blushing, what it does and does not do

Propranolol is a beta blocker, a medicine developed in the 1960s for the heart. It blocks some of the effects of adrenaline: it slows the heart rate, lowers blood pressure and steadies a tremor. Doctors prescribe it for blood pressure, heart rhythm, migraine and shaking hands, and, outside its official uses, for the physical side of performance anxiety, the pounding heart before a speech or an exam.

From there it is a short step to the idea that it might stop a blush. Adrenaline is involved in blushing, propranolol blunts adrenaline, so the pill should blunt the blush. That is the reasoning behind most of the posts recommending it. It is a reasonable guess. It has also been tested, and the guess is mostly wrong.

What the blush actually runs on

In 1997 Peter Drummond, who has studied blushing longer than almost anyone, put the guess to a direct test. He took 21 people who blush often and 21 who blush rarely, and used a small electric current to push a beta blocker, or an alpha blocker, into one patch of skin on the forehead. Then he measured blood flow on both sides of the face while they did stressful mental arithmetic, sang out loud, and exercised.

Blocking the beta receptors stopped the rise in blood flow during the arithmetic, but only in the people who rarely blush, and during singing it only partly reduced it. Blocking the alpha receptors did nothing to the blush at all. The frequent blushers, despite rating themselves far more self conscious, showed the same vascular responses as everyone else.

His conclusion was that beta receptors play a minor part in blushing, that how much someone blushes does not seem to depend on how many of those receptors sit in their facial blood vessels, and that blushing propensity may have a psychological basis.

That is the physiology behind the disappointment many people report. The pill is aimed at a small piece of the mechanism. The larger piece, the one that decides whether you are a frequent blusher, is not made of receptors.

What the trials say

In 2016 Steenen and colleagues gathered every randomised trial of propranolol for an anxiety disorder. There were eight. Four were about panic disorder, two about specific phobias, one about post traumatic stress. Exactly one was about social phobia, and it had sixteen participants. Their conclusion was that the quality of the evidence is insufficient to support the routine use of propranolol in the treatment of any of the anxiety disorders.

In 2025 Archer and colleagues repeated the exercise across all beta blockers, not only propranolol, because eight more years of research had passed. They found ten studies, five of them good enough to pool, with 179 people between them. There was no evidence of a benefit over placebo, or over benzodiazepines, in social phobia or in panic disorder. They also noted that prescriptions of beta blockers for anxiety had risen substantially between 2003 and 2018 with no clinical guidance behind them, and called for a large trial to settle the question.

The British guideline for social anxiety disorder, which is what fear of blushing sits inside, recommends individual cognitive behavioural therapy first, and an SSRI antidepressant for people who would rather take medication. Propranolol appears nowhere in its recommendations.

None of that says propranolol does nothing. It says that after sixty years nobody has shown, in a trial of reasonable size, that it helps social anxiety, and that no trial at all has looked at fear of blushing on its own.

What it may still be for

The situation doctors do sometimes prescribe it for is a single, known event: a presentation, an exam, a wedding speech. Some people find that a quieter heart and steadier hands make that one hour easier to get through, and that is a legitimate conversation to have with a doctor about a legitimate use.

It is a different thing from treating a fear that runs through every conversation of every day. A pill for an hour does not teach you anything about the next hour. And there is a quieter risk that the fear literature describes well: if you learn that you can only face a room with a tablet inside you, the fear learns that too, and the tablet becomes one more thing you cannot be seen without.

The trial that measured this most directly is not about propranolol but about the shape of the problem. When people with fear of blushing were treated for the fear, the fear fell substantially and their measured blushing did not change. The blush and the fear move separately. A drug that acts on the blush, even a drug that worked better than propranolol does, would leave the fear where it was.

What the leaflet says, in general terms

Any decision about this medicine includes the side of it that forums leave out. The patient information that comes with propranolol lists tiredness, cold hands and feet, dizziness, a slow heartbeat and disturbed sleep among its common effects. It is not given to people with asthma or certain other lung conditions, because it can narrow the airways, nor with some heart conditions or low blood pressure. It interacts with other medicines. After longer use it should not be stopped suddenly.

None of that is a reason to fear it. It is a widely used, well understood medicine. It is a reason to get it from a doctor who knows what else you take and what else is true about you, and not from a website, including this one.

Questions worth bringing to the appointment

What are you hoping it will do, on which occasions. Whether the thing you fear is the pounding heart or the red face, because the evidence for those two is different. Whether there is anything in your history that rules it out. What the plan is if it does not help. And whether you have been offered the approaches with better evidence, attention training and graded exposure, because a doctor who has not heard of task concentration training can be pointed at the trials.

If the answers are quick and the prescription is quicker, that is information too.

Where this site stands

Nowhere on the question of whether you should take it. That is medical advice and this is not a doctor.

What this site does say is that the approaches with the best evidence for fear of blushing are the ones that work on attention and on the fear, that they are covered in detail on the page about erythrophobia and in the daily videos, and that they cost nothing and cannot narrow anyone's airways. That seems like a reasonable order to try things in.