Can Ashwagandha Cause Hypotension?
Ashwagandha does not typically cause clinically significant hypotension in healthy adults, though it may modestly lower systolic blood pressure in certain populations.
Evidence-Based Assessment
The available evidence suggests ashwagandha has minimal hypotensive effects:
Blood Pressure Effects
One clinical trial demonstrated that Terminalia arjuna (not ashwagandha) lowered resting systolic blood pressure, while ashwagandha alone did not significantly affect blood pressure 1. When both were combined, improvements were seen in multiple parameters except diastolic blood pressure, suggesting ashwagandha's primary effects are on physical performance rather than blood pressure reduction 1.
A systematic review of herbs and spices found that certain botanicals can reduce blood pressure in hypertensive and pre-hypertensive populations but do not induce hypotension in normotensive individuals 2. This suggests a safety margin for those with normal baseline blood pressure.
Perioperative Considerations
Notably, the 2021 Society for Perioperative Assessment and Quality Improvement (SPAQI) consensus statement does not list ashwagandha among supplements that affect blood pressure perioperatively 3. The guideline specifically identifies supplements like theanine (which causes dose-dependent blood pressure decrease) and yohimbine (associated with both hypotension and hypertension), but ashwagandha is conspicuously absent from these cardiovascular concerns 3.
Clinical Context
Cardiovascular Profile
Recent comprehensive reviews describe ashwagandha's cardioprotective effects through antioxidant mechanisms and anti-inflammatory pathways, with no emphasis on hypotensive risk 4. The primary cardiovascular benefits appear related to endothelial function and lipid metabolism rather than direct blood pressure manipulation.
Safety Profile
The most clinically relevant adverse effects of ashwagandha are hepatotoxicity, gastrointestinal symptoms, and potential endocrine disruption—not hypotension 5. A 2026 critical safety review emphasizes liver toxicity and thyroid effects as primary concerns, particularly with prolonged use, without highlighting hypotension as a significant risk 5.
Practical Recommendations
- For normotensive patients: Ashwagandha at standard doses (300-500 mg/day) poses minimal hypotensive risk
- For hypertensive patients on antihypertensive medications: Monitor blood pressure as ashwagandha may have modest additive effects, though this is not well-established
- Perioperatively: No specific holding period required for blood pressure concerns, unlike supplements with documented cardiovascular effects 3
Common Pitfalls to Avoid
- Do not confuse ashwagandha with other adaptogenic herbs that have clearer hypotensive effects
- Focus monitoring on hepatic function and thyroid status rather than blood pressure when using ashwagandha long-term 6, 5
- Be aware that combination products may contain other herbs (like Terminalia arjuna) that do affect blood pressure 1