How long should one employ hydroquinone in the pursuit of achieving desired skin lightening effects? Is there a definitive duration that is universally endorsed, or does the timeline for usage depend largely on individual skin types and the severity of the hyperpigmentation being treated? Moreover, could it be that prolonged use might yield diminishing returns, or even adverse reactions in some individuals? How often is it recommended to consult with a dermatologist during the course of this treatment to monitor the effects and adjust the regimen accordingly? Additionally, for those who have previously used hydroquinone, what experiences have they reported regarding the transition off the medication? Are there specific protocols or steps that one should adhere to when discontinuing its use to prevent rebound pigmentation or other complications? In essence, what constitutes a safe and effective duration for hydroquinone application while maximizing its benefits and minimizing potential risks?