第だい一いっ相そう試し験けん

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Meanings

1

noun

phase I study; phase I trial

Clinical trial term; the first stage of testing a new drug or treatment in humans, primarily to assess safety.

験けん

Standard kanji spelling using the numeral 一.

第だい１いっ相そう試し験けん

Variant using the Arabic numeral 1; common in technical documents.

第だい２に相そう試し験けん
Phase II trial, which evaluates efficacy and side effects in a larger group.
第だい３さん相そう試し験けん
Phase III trial, which confirms effectiveness and monitors adverse reactions in large populations.

Compound of 第一相 (phase I) + 試験 (test, trial). A direct translation of the English clinical trial term.