In brief: Ashwagandha (Withania somnifera) is marketed as an adaptogen and has been studied in small trials for stress and sleep. Safety is not established for everyone or for long-term use.
More common side effects
| Issue | Interpretation |
|---|---|
| Stomach upset | Possible |
| Diarrhoea/vomiting | Possible |
| Drowsiness | Can occur |
| Liver injury | Rare but documented |
NCCIH lists gastrointestinal symptoms and drowsiness and notes rare reports of liver injury.[1]
Who should avoid or discuss it first?
- Avoid during pregnancy.
- Not recommended while breastfeeding.
- Use caution with thyroid and autoimmune disorders.
- Discuss use before surgery.
Possible interactions
Ashwagandha may interact with medicines for diabetes and high blood pressure, immunosuppressants, sedatives, anticonvulsants and thyroid hormone.[1]
Warning signs of liver problems
Yellow skin or eyes, dark urine, intense itching, persistent nausea or unusual upper-abdominal symptoms warrant stopping the product and seeking medical care.
FAQ
Is ashwagandha always safe?
No.
Can it affect the thyroid?
Yes.
Can it injure the liver?
Rare cases have been documented.
Is long-term use well studied?
No.
Conclusion
Ashwagandha is not a harmless universal supplement. Pregnancy, thyroid or autoimmune disease and regular medication all warrant extra caution.
