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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: Adv Drug Deliv Rev. 2021 Jan 22;171:94–107. doi: 10.1016/j.addr.2021.01.009

Figure 2.

Figure 2.

Light-responsive small molecules have distinct benefits in terms of ease of dosing, wide circulation, as well as spatiotemporally targeted activation. Light-activated designs rely on the circulatory system for delivery into local tissue, where the active form is revealed through targeted irradiation. Common strategies exploit prodrugs, dual-action drugs, and reversible photoswitches.