Primum Non Nocere
PREE-mum non no-SAIR-ay
Definition
Primum non nocere is a Latin phrase meaning 'first, do no harm.' This naturopathic principle emphasizes using the least invasive, most gentle therapies first to minimize risk of side effects and iatrogenic (treatment-caused) harm. Naturopathic doctors select treatments that support the body's healing processes without suppressing symptoms or causing additional damage.
Why It Matters
Many conventional treatments—while effective for acute conditions—carry significant side effects that can create new health problems. Naturopathic medicine prioritizes therapies like nutrition, herbs, and lifestyle changes that work with the body, reserving more aggressive interventions for when gentler approaches are insufficient.
Related Conditions
Related Modalities
Frequently Asked Questions
Not at all. It means starting with the gentlest effective approach and escalating only when necessary. In emergencies or severe conditions, more aggressive treatments may be the safest option. The principle is about thoughtful, individualized care that minimizes unnecessary risk.
Natural doesn't always mean safe—botanicals and supplements can have side effects and interactions. 'First do no harm' means using any treatment—natural or conventional—appropriately, with proper dosing, monitoring, and awareness of individual factors like allergies, medications, and health conditions.

Dr. Sanika Kshirsagar, ND
Doctorate of Naturopathic Medicine (ND)
Bastyr University, Kenmore, WA
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