Ashwagandha is generally well-tolerated — but 'natural' doesn't mean 'side-effect free', and the internet swings between pretending it's risk-free and panic headlines. Here's the honest middle.
Common (usually mild)
Digestive upset — the most reported issue, usually solved by taking it with food.
Drowsiness — it's calming; some people feel it as sleepiness. If so, take it in the evening.
Vivid dreams — occasionally reported, typically fades after the first weeks.
Who should NOT take ashwagandha (or ask a doctor first)
Pregnant or breastfeeding — not recommended.
Thyroid conditions — ashwagandha can raise thyroid hormone levels; if you take thyroid medication (including for Hashimoto's), talk to your doctor as your dose may need adjusting.
Autoimmune conditions — it can stimulate immune activity; medical advice first.
On sedatives, blood pressure, or blood sugar medication — possible additive effects.
Nightshade sensitivity — ashwagandha is a nightshade plant.
How to minimize risk
Choose a standardized, third-party-tested extract (KSM-66 or Sensoril) — quality issues cause more problems than the herb itself.
Start at the lower end (300mg), take with food, and reassess after 8–12 weeks of use. More is not better.
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