The investigators aim to investigate the role of the serotonin 2A receptor in women with premenstrual disorders. This study uses a double-blind, randomized, controlled design with 3 arms: Intervention 1: 10 micg LSD for \~10 days during the late luteal phase (for 3 cycles) Intervention 2: 10 micg LSD every other day for \~10 days during the late luteal phase (for 3 cycles) Control intervention: Placebo for \~10 days during the late luteal phase (for 3 cycles) Each participant will be treated in only one arm. The study employs a parallel design with three treatment arms and consists of a two-cycle observational phase followed by a three-cycle treatment phase.
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Change in premenstrual symptom burden
Timeframe: Daily over the 5 cycle study course (average cycle duration is 28 days)