Assertion: tranexamic acid | /r/ObjectUse | used in skin whitening
Facets:
value: as a topical agent
type: MANNER
value: sometimes
type: TEMPORAL
Source sentences:
text: In melasma - tranexamic acid is sometimes used in skin whitening as a topical agent, injected into a lesion, or taken by mouth, both alone and as an adjunct to laser therapy; as of 2017 its safety seemed reasonable but its efficacy for this purpose was uncertain because there had been no large scale randomized controlled studies nor long term follow-up studies.