[Solved] Propranolol, hypertension and psychedelics

Thank you for clarifying. Based on your use of Propranolol 10mg once daily (nocte) and having mild hypertension, here's an overview of what current insights and safety considerations suggest regarding psilocybin, ketamine, LSD, and MDMA:

1. Psilocybin

Psilocybin looks like the best option. Psilocybin causes a mild to moderate temporary increase in blood pressure—typically +10 to +20 mmHg systolic during the first 1–2 hours after ingestion. This is comparable to physical exertion such as a heavy gym set.

Key points:

1. Propranolol may blunt the heart rate response but does not fully prevent The blood pressure rises.

2. After the peak, blood pressure typically returns to baseline or even lowers mildly.

3. There's no known dangerous pharmacological interaction between propranolol and psilocybin, although data is still limited.

4. With well-controlled hypertension, psilocybin is generally considered safe under supervision with monitoring of vital signs.

If you're considering a psilocybin session, make sure your resting blood pressure is below 140/90 mmHg and that your physician agrees with the plan.

2. Ketamine

Ketamine, especially in subanesthetic doses, causes a more rapid and pronounced spike in blood pressure—on average +12 to +30 mmHg systolic. However, this peak is short-lived and returns to baseline within 1–2 hours.

Caution: Propranolol can increase sedative effects and make blood pressure reactions less predictable, so some ketamine clinics suspend beta blockers temporarily before treatment. Medical supervision is essential. Discuss with your doctor whether adjusting or pausing propranolol would be appropriate before ketamine therapy.

3. LSD

LSD produces a mild to moderate increase in blood pressure and heart rate (+10–25 bpm), but it lasts much longer (6–10 hours). Like psilocybin, propranolol may moderate heart rate effects but doesn't block blood pressure rise.

As with psilocybin, mild, well-controlled hypertension isn't an automatic exclusion. However, the long duration of the effect requires consistent monitoring and a comfortable, low-stress setting.

4. MDMA

This combination is not recommended. MDMA significantly increases both blood pressure (+20–40 mmHg systolic) and heart rate. Propranolol can suppress heart rate but may exacerbated vasoconstriction by leaving alpha-adrenergic effects unopposed — increasing the risk of hypertensive crises or arrhythmias.

In addition, both MDMA and propranolol are metabolized by the CYP2D6 enzyme, which means they may interfere with each other's metabolism, increasing the risk of toxic effects.

So, MDMA is not advisable for anyone on propranolol, especially with hypertension — even if mild.

Final Recommendations

You might be able to do sessions with psilocybin or LSD under medical supervision and controlled conditions. Ketamine may be an option depending on how your propranolol use is managed. MDMA should be avoided in your case.

To proceed, consider starting with a Triptherapie intake to assess your cardiovascular health, medication interactions, and choose the right substance and setting for you. And we also need you to check with your doctor, because he needs to help you with making a decision.

You use propranolol 10 mg once per night and have mild hypertension. Propranolol is a non-selective beta-blocker that lowers heart rate, stabilizes blood pressure, and is sometimes prescribed for menopausal symptoms (a low nocturnal HRT regimen). The question is whether psychedelic sessions with psilocybin, LSD, ketamine or MDMA be compatible with your health situation.
Below is an overview of the typical blood pressure course of these agents, the interaction with antihypertensives and beta-blockers, and recommendations for people with mild hypertension.

Physiology and interactions with antihypertensives

1. Blood pressure and psychedelics – Psychedelics activate serotonergic (5‑HT₂A), glutamatergic, or catecholaminergic systems, temporarily activating the sympathetic nervous system. With almost all substances, this leads to an increase in blood pressure and heart rate during the rise and peak, after which the values usually normalize.

2. Hypertension as an exclusion criterion – Clinical trials often exclude people with untreated or poorly controlled hypertension. In modern psilocybin protocols, for example, a resting blood pressure > 140/90 mmHg is considered a contraindication. Vitals are monitored before and during the dosing window.

3. Beta-blockers – There is little research into interactions between classic psychedelics and beta-blockers. A recent information page (2024) on psilocybin concludes that there no strong indications are for harmful interactions with ACE inhibitors or beta-blockers; however, definitive evidence is limited.

4. In a double-blind crossover study with 16 healthy volunteers, pindolol (20 mg, non-selective beta-blocker) prevented the increase in heart rate caused by MDMA, but not the increase in mean arterial pressure; blood pressure rose to ±115/11 mm Hg, regardless of the beta-blocker. This indicates that a beta-blocker dampens tachycardia but does not prevent hypertension.

5. MAO inhibitors and stimulants – A case from 2025 describes a patient who experienced a hypertensive crisis (BP ~230/100 mmHg) after psilocybin mushrooms in combination with a MAO inhibitor (tranylcypromine) and a amphetamine; The crisis was attributed to the accumulation of phenylethylamine from the mushrooms and the uninhibited stimulation by MAO inhibition.

6. This interaction is unrelated to standard antihypertensives, but emphasizes that MAO inhibitors and stimulants must not be combined with psychedelics.

Blood pressure progression by waist

The increase is short-term (first 1–2 hours) and usually normalizes during the plateau. Heart rate increases 5–15 bpm. In well-controlled hypertension, psilocybin is usually tolerated under medical guidance and monitoring. No strong evidence of dangerous interactions with beta-blockers; however, avoid MAO inhibitors

With intravenous therapy, peaks of up to +30 mmHg can occur, but the rise is short (normalizes within 1–2 hours). The rise occurs almost immediately after administration and subsides rapidly; the effect is dose-dependent and predictable. Due to possible blood pressure spikes, frequent monitoring is performed in ketamine clinics. Propranolol can enhance sedation and make blood pressure variability unpredictable.

In some studies, one-third of participants had systolic values >160 mmHg and HR >100 bpm. MDMA causes strong sympathomimetic stimulation (noradrenaline release), vasoconstriction, and thermogenesis. Spikes can be amplified by exercise, heat, or other stimulants.Contraindication in hypertension. Beta-blockers reduce tachycardia but not the rise in blood pressure.

Assessment for your situation (propranolol and mild hypertension)

1. Discuss it with a doctor

There is little research into the combination of psychedelics and beta-blockers; therefore, a personal risk analysis by your GP or a cardiologist essential. They can assess your blood pressure, heart function, and medication profile (including any other medications) and, if necessary, adjust the propranolol dosage around a session.

2. Stabilize the blood pressure

• For psilocybin or LSD therapy, clinical protocols usually require a resting blood pressure below approximately 140/90 mmHg
• Ensure that your hypertension is stable and discuss whether temporarily stopping or dosing propranolol is beneficial.
• Avoid MAO inhibitors or stimulants (such as amphetamines). The described hypertensive emergency with psilocybin involved the combination with tranylcypromine (MAOI) and dextroamphetamine.

3. Choose a controlled setting

Medical monitoring is crucial. A medical supervisor can measure your blood pressure and heart rate during the first hours of the session, when the rise is greatest, and intervene if safe limits are exceeded.

Drink plenty of water and avoid overheating. Restlessness, anxiety, and intense emotions can further increase blood pressure; therefore, a calm, supportive setting is important.

4. Specific advice per product

• Psilocybin and LSD: with mild and well-controlled hypertension and a low dose of propranolol, these agents appear relatively safe under supervision. Take into account a temporary increase in blood pressure (average 10–20 mmHg).
• Ketamine: can be safely used in stable hypertension, but consultation regarding the propranolol dosage is necessary; some clinics suspend beta-blockers shortly beforehand to prevent sedation.
• MDMAGiven the significant increase in blood pressure and heart rate, and the limited effect of beta-blockers on that increase, MDMA use is not recommended for people with hypertension or heart disease.

Conclusion

Psychedelics temporarily raise blood pressure; how high and for how long depends on the substance. Psilocybin and LSD usually give moderate increases that remain within safe limits in healthy people

Ketamine causes rapid but short hypertension; MDMA has the greatest cardiovascular impact and is therefore unsuitable for people with hypertension. Propranolol lowers the heart rate but does not prevent the rise in blood pressure associated with MDMA.

You use propranolol 10 mg and have mild hypertension. Consider psilocybin or LSD (and possibly ketamine) only under intensive medical supervision. after your doctor has assessed the risks and your blood pressure is well under control. Avoid MDMA and do not mix psychedelics with MAO inhibitors or other stimulants.

Source: https://pmc.ncbi.nlm.nih.gov/articles/PMC10661823/

This information does not replace medical advice; always discuss your personal situation with your doctor or a specialist in psychedelic therapy.