Generally speaking, ashwagandha is safe to use, although everyone should always consult with their healthcare provider (HCP) before beginning any type of supplement, especially people taking blood pressure or thyroid medicine. It’s also important to note that supplements aren’t monitored by the US Food and Drug Administration, so it’s important to make sure you’re getting any supplements from reliable companies.
People who suffer from heartburn, persistent inflammation, joint pain and diarrhea should avoid ashwagandha. And ashwagandha is in the nightshade family, which includes foods like eggplants and tomatoes, so it’s not an option for people with nightshade allergies.
Additionally, pregnant women should stay away from ashwagandha, unless instructed otherwise by their HCP. Since ashwagandha is a stimulating herb, it could induce contractions.