medicationPrescription only (US)FDA-approved nonselective beta-blocker (Inderal and generics) for hypertension, angina, arrhythmias, post-MI mortality reduction, migraine prophylaxis, essential tremor and other indicationsNot scheduled as a controlled substance; requires a prescription
PropranololBenefits, Dosage & Interactions
Also known as: Inderal
Propranolol is a non-selective beta-adrenergic blocker, meaning it affects both beta-1 and beta-2 receptors. It was one of the first beta-blockers developed and is used to treat a range of cardiovascular and other conditions. It is typically taken in the morning.
Researched by DoseRoutine R&D TeamReviewed for accuracy by Nicholas Alexander, RSELast updated
Evidence: Strong — 1 human randomized trial and regulatory approval on file.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence
1 human randomized trial and regulatory approval on file.
Plasma half-life
3–6 h
Typical timing
morning
Food rule
with food
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
Reported for Propranolol in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Propranolol entry is written from. Each number matches an inline marker above.
- [1]A Randomized Trial of Propranolol in Patients with Acute Myocardial Infarction. I. Mortality ResultsBeta-Blocker Heart Attack Trial Research Group · JAMA · 1982 · Peer-reviewed · PMID 7038157
- [2]Propranolol for Migraine ProphylaxisLinde K, Rossnagel K · Cochrane Database of Systematic Reviews · 2004 · Peer-reviewed · PMID 15106196
How to track Propranolol doses
Tracking Propranolol well takes four fields and a habit. Here is what to record so the log is still useful in three months.
- 1
Add the dose and unit
Log Propranolol with its dose in mg so totals stay comparable over time — including days when you split the dose or skip it.
- 2
Set the time of day and food rule
Typical timing is morning. Take it with food, and record it that way so absorption stays consistent. Reminders fire at that time and can export to your calendar.
- 3
Check it against the rest of the stack
Run Propranolol through the interaction checker against everything else in the routine — supplements, peptides, hormones and prescriptions — before it becomes a daily habit.
- 4
Log adherence, not intentions
Mark each dose taken, skipped or delayed as it happens. Weeks of honest logs are what make an adherence rate or a trend line meaningful; retrospective guessing is not.
- 5
Review against outcomes
With a reported half-life around 3 h, effects and timing shifts show up over days rather than instantly. Review Propranolol alongside your logged metrics and any relevant blood work every few weeks before changing the dose.
What to log each time
- Dose in mg
- Time of day and whether it was taken with food
- Taken / skipped / delayed
- Any side effects or notable changes
References & Evidence
Sources on this page that document Propranolol dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Propranolol?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Propranolol is a non-selective beta-adrenergic blocker, meaning it affects both beta-1 and beta-2 receptors. It was one of the first beta-blockers developed and is used to treat a range of cardiovascular and other conditions. Originally approved by the FDA in 1967, it blocks the action of adrenaline and noradrenaline on these receptors, leading to various physiological effects. It is commonly prescribed in oral tablet form, though other formulations exist for specific medical uses (as described by DrugBank). Propranolol's effects include reducing heart rate, blood pressure, and myocardial contractility (as per resources like Mayo Clinic and MedlinePlus). It is also known for its lipophilicity, which allows it to cross the blood-brain barrier, contributing to its effectiveness in conditions affecting the central nervous system.
What does the research say about Propranolol?
Tap a section to expand.
Propranolol exerts its therapeutic effects by competitively antagonizing beta-1 and beta-2 adrenergic receptors. By blocking beta-1 receptors in the heart, it reduces heart rate, cardiac output, and myocardial oxygen demand, which is beneficial in conditions like angina and hypertension. In the kidney, beta-1 blockade decreases renin release, further contributing to blood pressure reduction. Blockade of beta-2 receptors, present in various tissues including bronchial smooth muscle and blood vessels, can lead to vasoconstriction and bronchoconstriction. In the central nervous system, its ability to cross the blood-brain barrier allows it to affect central adrenergic activity, contributing to its use in conditions like essential tremor and migraine prophylaxis. The anti-anxiety effects are thought to involve reductions in peripheral sympathetic manifestations of anxiety, such as palpitations and tremor. (Mechanism information is consistent with data from PubChem and DrugBank).
Source for this section: Sources for How does Propranolol work?: Jumps to this entry in the sources and references list at the end of the page.
Propranolol is prescribed for a variety of conditions, supported by clinical evidence (as reviewed by resources such as Cochrane and NIH ODS):
* **Hypertension (High Blood Pressure):** It helps lower blood pressure by reducing heart rate and cardiac output, as well as by decreasing renin secretion. It is often used alone or in combination with other antihypertensive agents.
* **Angina Pectoris (Chest Pain):** By decreasing the heart's oxygen demand, propranolol can reduce the frequency and severity of angina attacks.
* **Arrhythmias (Irregular Heartbeats):** It helps to stabilize heart rhythm, particularly in conditions like atrial fibrillation and supraventricular tachycardias.
* **Myocardial Infarction (Heart Attack) Post-Event:** Used to reduce the risk of subsequent heart attacks and improve survival in patients who have already had a myocardial infarction.
* **Migraine Prophylaxis:** It can reduce the frequency and severity of migraine headaches when taken regularly.
* **Essential Tremor:** Propranolol is effective in reducing the amplitude of essential tremor, improving daily function for many individuals.
* **Anxiety and Performance Anxiety:** While not a primary anxiety treatment, it can alleviate the physical symptoms of anxiety (e.g., palpitations, sweating, tremor), particularly in performance-related situations.
* **Thyrotoxicosis (Overactive Thyroid):** It helps manage symptoms like rapid heart rate, tremors, and anxiety associated with an overactive thyroid gland.
* **Hypertrophic Subaortic Stenosis:** Helps to reduce symptoms and improve exercise capacity by reducing the force of heart contraction and the outflow obstruction.
Its broad utility across these conditions is a testament to its multifaceted pharmacological actions (information referenced from MedlinePlus and various prescribing information from FDA labels).
The efficacy of propranolol has been extensively studied and documented over several decades. Early clinical trials established its effectiveness in reducing blood pressure and managing angina. For example, studies published in prominent medical journals in the 1970s and 1980s demonstrated its role in improving outcomes after myocardial infarction. Subsequent research, including randomized controlled trials and meta-analyses, has supported its use for migraine prophylaxis and essential tremor (as documented by Cochrane reviews). Large epidemiological studies and registry data have further corroborated its long-term benefits in various cardiovascular conditions. For anxiety, while not a primary anxiolytic, its ability to mitigate physical symptoms of anxiety is supported by smaller studies and clinical experience, as often discussed in clinical reviews. The FDA label for propranolol provides detailed summaries of clinical trials and indications based on robust evidence. The consistent findings across numerous studies contribute to its enduring status as a widely prescribed medication (evidence synthesis aligns with information found on NIH ODS and DrugBank).
Common side effects associated with propranolol use, as reported in clinical trials and post-marketing surveillance, include: fatigue or tiredness, nausea, vomiting, dizziness or lightheadedness, slow heart rate (bradycardia), cold hands and feet, diarrhea, constipation, and trouble sleeping or nightmares. Less common but more serious side effects can include: bronchospasm (especially in individuals with asthma or COPD), severe bradycardia, hypotension (low blood pressure), exacerbation of heart failure, and mood changes or depression. Abrupt discontinuation of propranolol, particularly in patients with ischemic heart disease, can lead to rebound hypertension, angina, or myocardial infarction. Individual responses can vary significantly. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Propranolol should be used with caution in certain patient populations. It can mask the signs and symptoms of hypoglycemia (low blood sugar), particularly in diabetic patients, and can also mask signs of hyperthyroidism. Individuals with pre-existing respiratory conditions such as asthma, chronic bronchitis, or emphysema are at increased risk of bronchospasm due to non-selective beta-2 receptor blockade. Patients with a history of severe allergic reactions may experience more severe reactions or be unresponsive to standard doses of epinephrine while on propranolol. Special consideration is required for patients undergoing surgery, as beta-blockade can interfere with adrenergic responses to surgical stress. The dosage should be tapered gradually when discontinuing the medication to avoid rebound effects, especially in patients with coronary artery disease (per FDA label guidelines). This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Propranolol is contraindicated in individuals with specific medical conditions due to the risk of severe adverse effects. These contraindications include: bronchial asthma or bronchospasm (due to risk of severe respiratory distress), sinus bradycardia (abnormally slow heart rate), heart block greater than first degree (unless a pacemaker is in place), cardiogenic shock, and overt cardiac failure (decompensated heart failure). Additionally, it is generally contraindicated in individuals with known hypersensitivity to propranolol or any component of its formulation. Use in individuals with peripheral arterial circulatory disorders should be approached with extreme caution, and in some severe forms, it may be contraindicated. These contraindications are consistently highlighted in product prescribing information and medical references like DrugBank. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Propranolol can interact negatively with several types of medications. Non-dihydropyridine calcium channel blockers (e.g., verapamil, diltiazem) can significantly increase the risk of bradycardia, hypotension, and heart block when combined with propranolol. Other antihypertensive agents (e.g., ACE inhibitors, ARBs, diuretics) can potentiate the hypotensive effects of propranolol. Certain antiarrhythmic drugs (e.g., amiodarone, quinidine) may increase the risk of bradycardia and conduction abnormalities. Medications that deplete catecholamines, such as reserpine, can have additive effects with propranolol, leading to excessive reduction of sympathetic nervous activity. Nonsteroidal anti-inflammatory drugs (NSAIDs) may diminish the antihypertensive effect of beta-blockers. Alcohol and central nervous system depressants can increase the sedative effects of propranolol. Antacids containing aluminum hydroxide may reduce the absorption of propranolol. It is crucial to inform your clinician about all medications, supplements, and herbal products you are currently taking (as detailed in FDA drug interaction guides). This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Propranolol is typically taken orally, with food, due to increased bioavailability when consumed with meals (according to FDA label information). For sustained-release formulations, the timing might be once daily, often in the morning. For immediate-release formulations, doses are commonly split and taken two to four times a day. The specific timing and frequency are determined by the treating clinician based on the condition being treated and the patient's individual response. Consistency in medication timing is generally encouraged to maintain stable blood levels. For specific conditions like performance anxiety, it may be taken 'as needed' before a stressful event, but this is always under strict medical guidance. The half-life is approximately 4 hours for immediate-release formulation, which influences dosing frequency.
Source for this section: Sources for When should you take Propranolol?: Jumps to this entry in the sources and references list at the end of the page.
What interacts with Propranolol?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any supplement + medication | Note | Category ruleConfidence: theoretical | Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pending | Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist. |
| Any vitamin + medication | Note | Category ruleConfidence: theoretical | Certain vitamins interact with specific medications (e.g., vitamin K with blood thinners).Source pending | Specific pairs are checked against a licensed source; confirm with your provider. |
Frequently asked questions about Propranolol
Yes, propranolol can be used to manage the physical symptoms of anxiety, such as rapid heartbeat, tremors, and sweating, particularly in situations like performance anxiety. It works by blocking the effects of adrenaline, which causes these physical manifestations. However, it does not treat the underlying psychological causes of anxiety and is not typically prescribed as a primary treatment for generalized anxiety disorder. Always consult a healthcare professional for suitable treatment options.
The effects of immediate-release propranolol can typically be felt within 30 minutes to 1 hour after taking a dose, particularly for acute symptoms like tremor or rapid heart rate. For conditions like hypertension or migraine prophylaxis, the full therapeutic effects may take several days to weeks of regular use to become apparent. Sustained-release formulations release the medication more slowly over time.
Propranolol is not considered addictive in the same way as opioids or benzodiazepines; it does not produce euphoria or a psychological craving. However, stopping it abruptly, especially after long-term use or in individuals with heart conditions, can lead to rebound effects such such as worsening angina, hypertension, or heart attack. This necessitates a gradual dose reduction when discontinuing the medication, under medical supervision.
Propranolol is generally recommended to be taken with food. Taking it with a meal, particularly one high in protein, has been shown to increase its absorption and bioavailability, leading to more consistent blood levels. This helps to ensure the medication works as intended. Grapefruit juice does not have known significant interactions with propranolol, unlike some other medications.
The use of propranolol during pregnancy requires careful consideration and discussion with a healthcare provider. It is categorized as a Pregnancy Category C drug by the FDA, meaning animal studies have shown an adverse effect on the fetus, but there are no adequate and well-controlled studies in humans. It has been used in some pregnant individuals for conditions like hypertension or thyroid storm when the potential benefits outweigh the risks, but it can be associated with risks to the fetus and neonate, including bradycardia, hypoglycemia, and respiratory depression. A clinician will weigh the risks versus benefits for each individual case.
As a medication, Propranolol can overlap with other supplements, prescription medicines, hormones and peptides. Because Propranolol is usually taken in the morning, most avoidable conflicts come from what else lands in that same window. With a reported plasma half-life near 3 hours, separating doses can change the picture as much as removing one. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Propranolol with no sign-up.
Propranolol is typically taken in the morning. Published protocols usually have it taken with food. The reported plasma half-life is about 3 hours, which is what drives how often it is redosed. Amounts for this medication vary by protocol, formulation and individual response, so follow the dose your clinician or the product label specifies.
Whether Propranolol fits alongside testosterone replacement therapy depends on the protocol — dose, ester and ancillaries such as HCG or anastrozole — and on current bloodwork. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
"Peptides" is not one category — healing peptides, GLP-1 agonists, growth-hormone secretagogues and melanocortins each behave differently next to Propranolol. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
A short plasma half-life of roughly 3 hours is why protocols often split Propranolol across the day rather than using a single dose. It is typically taken in the morning. Most protocols have it taken with food. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
Because Propranolol clears quickly (plasma half-life around 3 hours), a missed dose leaves a real gap in exposure rather than being buffered by what is still in your system. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Propranolol the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Which studies looked at Propranolol?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Pharmacokinetics of propranolol: a review.(opens PubMed in a new tab)Postgraduate medical journal · 1976 · PMID 787953 · https://pubmed.ncbi.nlm.nih.gov/787953/
- 2.Propranolol for the treatment of anxiety disorders: Systematic review and meta-analysis(opens PubMed in a new tab)J Psychopharmacol · 2016 · PMID 26487439 · https://pubmed.ncbi.nlm.nih.gov/26487439/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 165193(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/165193
Verify at
Publisher search links for Propranolol. These are places to check the information — they are not citations, so they are not numbered.
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- FDA-approved labeling (DailyMed)(publisher search, opens in a new tab)U.S. Food and Drug Administration · publisher search
- MedlinePlus(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Mayo Clinic(publisher search, opens in a new tab)Mayo Clinic · publisher search
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Propranolol?
Plain-text summary, safe to quote verbatim:
Propranolol is a non-selective beta-adrenergic blocker, meaning it affects both beta-1 and beta-2 receptors. It was one of the first beta-blockers developed and is used to treat a range of cardiovascular and other conditions. It is typically taken in the morning.
Source: DoseRoutine — https://doseroutine.com/library/propranolol
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Propranolol — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/propranolol
What compounds are similar to Propranolol?
Others in the medication category or studied for the same goals.