Ashwagandha Side Effects: What You Need to Know Before Trying It

Key Takeaways: Ashwagandha side effects are typically mild and include digestive issues like nausea or diarrhea and slight drowsiness. While generally safe for short-term use, it may cause rare liver complications or interact with medications for thyroid, blood pressure, and diabetes.

Ashwagandha side effects are a common topic of conversation for anyone looking to manage stress naturally, as this ancient herb has surged in popularity across the globe. Known scientifically as Withania somnifera, it has been a cornerstone of Ayurvedic medicine for centuries. People reach for it to help with everything from sleepless nights to gym performance. But just because something comes from a root doesn’t mean it’s a free pass for everyone. Understanding how your body might react is the first step toward using it safely.

Common Ashwagandha Side Effects to Watch For

Most people who try this adaptogen find it relatively easy to tolerate. However, like any supplement, it can cause a few hiccups as your body adjusts. The most frequently reported issues are usually related to the gut.

If you take too much at once, or perhaps take it on an empty stomach, you might experience:

• Stomach upset or cramping
• Diarrhea or loose stools
• Nausea and occasional vomiting

Beyond the digestive system, some users report feeling a bit “too relaxed.” Because the herb is designed to lower cortisol and calm the nervous system, it can lead to noticeable drowsiness. This is great if you are taking it before bed, but less ideal if you have a morning board meeting or a long drive ahead of you.

Rare But Serious Ashwagandha Side Effects

While the everyday symptoms are usually mild and disappear once you stop taking the supplement, there are some rare complications that require a bit more caution.

Liver Health Concerns

There have been rare reports linking certain ashwagandha supplements to liver injury. According to the National Center for Complementary and Integrative Health (NCCIH), while these cases are uncommon, they are significant. Symptoms like yellowing of the skin (jaundice), dark urine, or extreme fatigue shouldn’t be ignored. If you notice these, it is best to stop use immediately and chat with a healthcare provider.

Thyroid and Hormonal Shifts

Ashwagandha is known to give the thyroid a little “nudge.” For someone with an underactive thyroid (hypothyroidism), this might seem like a benefit. However, for those with hyperthyroidism, it could push hormone levels into a dangerous zone. Similarly, because the herb can increase testosterone levels, men with hormone-sensitive prostate cancer are generally advised to steer clear.

Who Should Be Extra Cautious?

Safety isn’t one-size-fits-all. Some people should avoid this herb entirely due to how it interacts with their specific biology or existing health conditions.

1. Pregnant Individuals: This is a big one. Some evidence suggests that high doses of ashwagandha could potentially cause miscarriages. Most experts, including those at WebMD, strongly advise against using it during pregnancy.
2. Autoimmune Disease Patients: Conditions like lupus, rheumatoid arthritis, or multiple sclerosis involve an overactive immune system. Since ashwagandha can actually boost immune activity, it might make these conditions flare up.
3. Upcoming Surgery: If you have a surgery scheduled, stop taking the herb at least two weeks beforehand. It can affect the central nervous system, and doctors worry it might interact poorly with anesthesia.

A Quick Comparison: Short-Term vs. Long-Term Use

The research on this herb is robust for short durations, but we are still learning about what happens when you take it for years at a time.

Feature	Short-Term (Up to 3 Months)	Long-Term (Over 6 Months)
Safety Profile	Generally considered safe for most.	Limited data available.
Common Effects	Mild drowsiness, better sleep quality.	Possible tolerance or “numbing” effect.
Medical View	Widely supported for stress relief.	Doctors often suggest “cycling” the herb.

Medication Interactions to Keep on Your Radar

This herb doesn’t always play well with others. If you are on a daily prescription, the way ashwagandha interacts with those drugs can change how they work in your body.

• Diabetes Medications: Ashwagandha can naturally lower blood sugar. If you are already taking insulin or metformin, your levels could drop too low (hypoglycemia).
• Blood Pressure Drugs: Similar to its effect on blood sugar, it can lower blood pressure. Combining it with meds for hypertension might lead to dizziness or fainting.
• Sedatives: Since the herb is naturally calming, it can amplify the effects of benzodiazepines or sleep aids, making you feel excessively groggy.

Practical Examples and Common Mistakes

When people start a new supplement, they often want results “right now.” This leads to some common pitfalls that can increase the risk of ashwagandha side effects.

The “More is Better” Mistake

Many people think that if 300 mg helps them feel calm, 1200 mg will make them feel invincible. In reality, higher doses are much more likely to cause vomiting and diarrhea without necessarily providing extra stress relief.

The Empty Stomach Error

Taking a concentrated extract on an empty stomach is the fastest way to trigger nausea. A simple fix? Take your dose with a small meal or a snack containing some healthy fats to help with absorption and protect your stomach lining.

Forgetting to Cycle

Because long-term data is still thin, many practitioners suggest a “five days on, two days off” approach or taking a full week off every month. This prevents your body from becoming too accustomed to the herb and helps you monitor how you feel without it.

Steps for Safely Starting Ashwagandha

If you’ve weighed the risks and want to give it a go, following a steady plan can help you avoid unwanted reactions.

1. Consult your doctor: Especially if you have a pre-existing condition or take daily medications.
2. Start with a low dose: Look for a standardized extract (often labeled as KSM-66 or Sensoril) and start at the lower end of the recommended range (around 300 mg).
3. Monitor your mood and digestion: Keep a mental or written note of how you feel for the first two weeks.
4. Check for quality: Choose brands that undergo third-party testing (like USP or NSF) to ensure you aren’t consuming heavy metals like lead or mercury, which are sometimes found in low-quality Ayurvedic products.

FAQ: Your Questions Answered

Can ashwagandha cause weight gain?

Actually, the opposite is more common. By lowering cortisol (the stress hormone linked to belly fat), it may help some people manage their weight more effectively. However, everyone’s metabolism reacts differently.

Is it okay to take ashwagandha every day?

Most clinical trials show it is safe for daily use for up to three months. Beyond that, it is usually recommended to take a break or cycle your usage until more long-term research is published.

Does it cause hair loss?

There is no strong clinical evidence suggesting it causes hair loss. In fact, by reducing stress—a major cause of thinning hair—it might indirectly support hair health for some.

Will it make me feel “numb” or emotionless?

Some users on social media have reported a feeling of “anhedonia” (lack of emotion). While not a officially listed medical side effect in most studies, it’s something to be aware of if you start feeling disconnected while taking high doses.

What is the best time of day to take it?

If you want to improve your sleep, take it in the evening. If you are using it for general stress support throughout the day, some people prefer splitting their dose between morning and night.

While the list of potential ashwagandha side effects might look intimidating, remember that most people use the herb without any major issues. It’s all about being an informed consumer, starting slow, and listening to what your body is telling you.