Using ashwagandha to improve cognitive function in cancer patients undergoing chemotherapy

A Randomized Placebo-controlled Trial of Ashwagandha (Withania Somnifera) for Cognitive Dysfunction Associated With Cancer Chemotherapy.

Phase 2 Interventional Sutter Health · NCT04092647

This study is testing if ashwagandha can help cancer patients who are experiencing 'chemo fog' improve their thinking and memory while they are undergoing chemotherapy.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment80 (estimated)
Ages18 Years and up
SexAll
SponsorSutter Health Academic / other
Drugs / interventionschemotherapy, radiation
Locations1 site (Sacramento, California)
Trial IDNCT04092647 on ClinicalTrials.gov

What this trial studies

This interventional trial aims to evaluate the effectiveness of ashwagandha in improving cognitive dysfunction, often referred to as 'chemo fog', in patients currently undergoing chemotherapy or who have received it in the past year. Participants will be randomly assigned to receive either ashwagandha or a placebo in a double-blinded manner. Cognitive assessments will be conducted at baseline and after 9 weeks of treatment using various standardized tests. The study will also monitor thyroid hormone levels in patients with a history of thyroid disease.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 and older who are currently undergoing chemotherapy or have received it in the past year and report cognitive difficulties.

Not a fit: Patients with hormone-dependent cancers, pre-existing dementia, or those taking medications that alter cognition may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a natural treatment option to alleviate cognitive dysfunction in cancer patients undergoing chemotherapy.

How similar studies have performed: While the use of ashwagandha for cognitive dysfunction is a novel approach, other studies have explored herbal supplements for cognitive enhancement, but specific results for ashwagandha in this context are limited.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Age 18 years and older
2. English speaking
3. Currently undergoing chemotherapy or treatment with chemotherapy in the past year
4. Self-reported memory loss, attention, visual-spatial functioning, reasoning, or information processing or cognitive changes in the first 2 cycles of chemotherapy and score \< 63 on the FACT-Cog PCI
5. Able to follow instructions for testing and comply with testing
6. Able to swallow pills

Exclusion Criteria:

1. Undergoing treatment for any hormone dependent cancer
2. Planned surgical treatment
3. History of pre-existing dementia, untreated depression, psychiatric disorder, prior brain radiation or brain injury
4. History of hypotension
5. Active autoimmune disease
6. Brain metastasis
7. Taking any drugs daily that would alter cognition
8. Concurrent use of benzodiazepenes or other sedatives
9. Concurrent use of supplements that can cause sedation such as 5-HTP, calamus, California poppy, hops, Jamaican dogwood, kava, St.John's Wort, skullcap, valerian, yerba mansa
10. Currently taking hypoglycemic medications
11. History of substance abuse
12. Current or recent diagnosis of stomach ulcer or gastritis

Where this trial is running

Sacramento, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Chemo Fogashwagandhacognitive dysfunctioncancer chemotherapy
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.