Propranolol (Inderal)
A beta blocker used off-label for the physical symptoms of situational anxiety, such as performance anxiety.
What it treats
Propranolol is a beta blocker. It is approved by the U.S. Food and Drug Administration for heart conditions, high blood pressure, migraine prevention, and tremor. In psychiatry it is used off-label, meaning for a purpose the label doesn't formally list even though evidence and practice support it, for the physical symptoms of anxiety. Its main psychiatric use is for situational or performance anxiety, such as stage fright, public speaking, a music audition, or any time-limited event where the body's stress response gets in the way.
It is worth being clear about what propranolol is and is not for. The anxiety use is off-label, and it is narrow. Propranolol is not a treatment for an anxiety disorder broadly. It is not a treatment for generalized anxiety disorder, the condition of ongoing, hard-to-control worry, and it is not a treatment for panic disorder. For those, SSRIs, SNRIs, and therapy are the mainstays, because they address the disorder itself. Propranolol fills a different and smaller role: easing the physical side of a stressful, time-limited situation. Someone whose anxiety is constant, or who has panic attacks out of the blue, is unlikely to find propranolol the answer on its own. Someone whose specific problem is a pounding heart and trembling hands before a known, scheduled event may find it well suited.
How it works
Propranolol blocks the action of adrenaline on the body's beta receptors, which are the sites adrenaline acts on to speed the heart, raise blood pressure, and prime the body for action. When stress triggers a surge of adrenaline, those receptors are what translate it into a racing pulse and a body braced for fight or flight. Propranolol sits in the way of that signal.
It does not act on the brain's anxiety circuits the way an SSRI or a benzodiazepine does. It does not change serotonin, and it does not work through the brain's calming GABA system. What it does instead is blunt the physical symptoms of the fight-or-flight response: the racing heart, the trembling hands, the shaky voice, the visible flush. It treats the body's anxiety symptoms rather than the mental experience of worry itself. This distinction is the key to understanding the medication. For someone whose main problem before a presentation is a pounding heart and unsteady hands, that physical calm can be exactly the right tool, and quieting the body can in turn take some heat out of the worry, because the racing heart is no longer there to feed it. For the worried thoughts themselves, propranolol does little. The mental experience of dread is not what it touches.
What to expect
Propranolol does not have the slow build of an antidepressant. Its effect depends on whether it is being used as needed for a specific event or, less commonly in this setting, on a regular schedule.
Before a stressful event, taken as needed
Taken as a single dose before a known stressful situation, propranolol generally works within about an hour. That timing is why a prescriber will often suggest taking it some time ahead of the event rather than at the last minute. During the event, the physical symptoms it targets, the fast heartbeat, the trembling, the shaky voice, tend to be noticeably calmer. What does not change is the inner experience. A person may still feel nervous or have anxious thoughts. The difference is that the body is not amplifying them.
Common side effects
Side effects are usually mild, especially with occasional use. The common ones include:
- Tiredness.
- Cold hands and feet.
- Dizziness or lightheadedness, from a lowered heart rate and blood pressure.
- Sometimes vivid dreams.
These effects are more noticeable with regular daily use than with occasional as-needed use. Standing up quickly can sometimes bring on a brief wave of lightheadedness, since propranolol lowers blood pressure. If a side effect is bothersome, that's a conversation to have with the prescriber.
Serious side effects and warnings
Propranolol is generally well tolerated, and serious problems are uncommon. Several points are worth knowing, and a few of them are reasons propranolol is not the right choice for everyone.
- It lowers heart rate and blood pressure. Because of this, propranolol is used carefully, or avoided, in people with certain heart conditions, a very low resting heart rate, or certain slow heart rhythms, sometimes called heart block. A prescriber will review the heart history before recommending it.
- It can narrow the airways. Beta blockers can tighten the airways, so propranolol is generally avoided in people with asthma and is used with caution in some other breathing conditions, such as chronic obstructive pulmonary disease. For someone with asthma, this is one of the most important reasons to mention the condition before propranolol is prescribed.
- It can mask warning signs of low blood sugar. Some of the early signs of low blood sugar, such as a fast heartbeat and trembling, are produced by adrenaline, and propranolol blunts exactly those signals. For people with diabetes, especially those who take insulin or other medications that can cause low blood sugar, this can make a dangerous low harder to notice in time.
- Regular use should not be stopped abruptly. If propranolol is taken regularly for a period of time, stopping it suddenly can cause a rebound, with a jump in heart rate and blood pressure that can be a real problem for the heart. Regular use is therefore tapered, with the dose stepped down under a prescriber's guidance. Occasional as-needed use for performance anxiety is a different situation and does not carry this concern in the same way.
Propranolol is not a controlled substance and does not cause dependence.
Sexual side effects
Beta blockers can occasionally contribute to erectile difficulties. This is more likely with regular daily use than with occasional, as-needed use for performance anxiety. If you do notice a change, it is worth raising with your prescriber, since other factors, including anxiety itself, can play a part.
Weight, appetite, and sleep
Propranolol is not a major cause of weight change. It does not typically affect appetite the way some other medications can.
It can cause vivid or unsettling dreams in some people, more so with regular use, and some people notice tiredness during the day. If sleep is disrupted, a prescriber can review the dose and the timing.
Starting and dosing basics
This section is general background, not a dosing instruction for any individual. The right dose and how it is used are decisions for a prescriber.
Propranolol comes as tablets and as capsules, and there are both shorter-acting and longer-acting forms. For performance anxiety, a low dose of a shorter-acting form is typically taken before the event. The prescriber sets the dose and decides how it should be used, based on the situation, the person's heart rate and blood pressure, and how they respond to a trial. Because individual responses vary, a prescriber will often start low.
Missed doses and interactions
For as-needed use before a stressful event, follow the prescriber's guidance, since occasional use does not involve a fixed daily schedule. If propranolol is taken on a regular schedule, a missed dose is generally taken when remembered, unless it is almost time for the next one, in which case the missed dose is skipped rather than doubled.
Interactions are worth checking carefully. Other medications that lower blood pressure or heart rate, including other heart medications and certain calcium channel blockers, can add to propranolol's effect and bring the heart rate or blood pressure too low. Caution is needed alongside asthma medications, since propranolol can work against them and reduce how well they open the airways. Propranolol can affect blood sugar control and the warning signs of low blood sugar, which matters for people taking diabetes medications. Some other drugs change how the body processes propranolol, raising or lowering its levels. Give every prescriber and pharmacist a full list of your medications and supplements, including over-the-counter ones, so these combinations can be checked.
Stopping and tapering
Occasional as-needed use of propranolol for performance anxiety is straightforward to stop. There is no dependence and no need for a taper when it has only been used now and then.
If propranolol is taken regularly, for any length of time, the situation is different. Regular use should not be stopped abruptly, because a sudden stop can cause a rebound rise in heart rate and blood pressure. Coming off regular propranolol should be planned with a prescriber, with the dose lowered in steps rather than all at once.
Pregnancy and breastfeeding
This is an area where individual circumstances matter and the decision belongs with a clinician. Anyone who is pregnant, planning a pregnancy, or breastfeeding should discuss propranolol with their prescriber so the specific risks and benefits can be weighed for their situation.
Cost and generic availability
Propranolol has been available as a generic for many years and is very inexpensive. The brand name Inderal and generic propranolol contain the same active medication and work the same way. Most insurance plans cover it, and for people paying out of pocket, generic propranolol is among the lowest-cost medications used in this setting. Because performance anxiety often calls for only occasional use, a single prescription can last a long time, which keeps the real cost low.
Common questions
Does propranolol treat anxiety, or just the physical symptoms? It treats the physical symptoms, like a racing heart and trembling hands, rather than the mental experience of worry. It does not act on the brain's anxiety circuits the way an SSRI or a benzodiazepine does.
Is propranolol addictive? No. It is not a controlled substance and does not cause dependence or cravings.
Can I take it as needed before a presentation? For performance or situational anxiety, propranolol is often used exactly that way, as needed before the event rather than every day. A prescriber sets how and when to use it, and a trial run on an ordinary day is often a good idea.
Is it a treatment for generalized anxiety or panic disorder? No. Propranolol is for the physical symptoms of time-limited, situational anxiety. Generalized anxiety disorder and panic disorder are usually treated with SSRIs, SNRIs, and therapy.
Who should not take it? Propranolol is generally avoided in people with asthma, and it is used carefully in people with certain heart conditions, a very low heart rate, certain slow heart rhythms, or diabetes. A prescriber will review your health history before recommending it.
How fast does it work? Taken before a stressful event, propranolol works within about an hour.
Can I stop it whenever I want? Occasional as-needed use can be stopped freely. If propranolol has been taken regularly, it should not be stopped abruptly, because that can cause a rebound rise in heart rate and blood pressure. Regular use is tapered with a prescriber.
Questions to ask your prescriber
- What are we hoping this treats, and how will we know it's working?
- How and when should I take it, and how often?
- Should I try it once on an ordinary day before relying on it for an event?
- Which medications and substances should I avoid while on it?
- Are there any health conditions I have, such as asthma, diabetes, or a heart condition, that make this a poor fit?
- If I end up needing it more often, what would we consider instead?
Sources
This guide draws on current prescribing information and public health references. It is reviewed for clinical accuracy and updated as guidance changes.
This medication's primary condition across the entire Shrink Network Social Anxiety Disorder Cluster on Shrinkopedia
THE KNOWLEDGE PATH
Walk this topic outward.
- MEDICATION Propranolol (Inderal) (current)
- CLASS Beta blockers
- CONDITION Social Anxiety Disorder (on Shrinkopedia)
- MAP The Social Anxiety Map (on AR)
- CARE Anxiety care at shrinkMD
The Knowledge Path is a curated walk. Every step is one decision away from the next.
When to seek urgent help
Most side effects are mild, but a few problems are urgent and need same-day attention.
- Severe allergic reactions, such as swelling of the face, lips, or tongue, or trouble breathing.
- Fainting, a very slow or very fast heartbeat, or chest pain.
- New or worsening thoughts of suicide or self-harm.
Managing a medication needs a prescriber
Any psychiatric medication has to be started and adjusted by a clinician who can follow you over time. If you don't have a prescriber, our guides section explains the options, including in-person care and telepsychiatry, and how to choose between them.