Laetrile/Amygdalin (PDQ®) — Health Professional Version
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Evidence roles describe what this source helps establish inside each Investigation. They are local to that use, not permanent labels attached to the publication itself.
The U.S. National Cancer Institute's clinical-study summary reports 178 treated patients, 175 evaluable, one partial tumour response lasting 10 weeks and progression in all evaluable patients within seven months after the intravenous phase.
NCI summarizes an uncontrolled multicomponent treatment cohort rather than an independent randomized trial; isolated responses have no reliable untreated counterfactual. Oral dosing elevated cyanide concentrations.