Yes, you can take melatonin with citalopram. It is generally recommended to adjust your sleep hygiene and try different healthy sleep habits to improve your sleep quality. Some tips include managing stress, sticking to a consistent wake-up time, avoiding naps during the day, reducing caffeine intake, avoiding stimulants, exercising daily, not eating too close to bedtime, turning off screens an hour before bed, and keeping work and electronics out of the bedroom. Additionally, avoid looking at the clock during the night and consider jotting down your worries before bed to address them the next day. It may take a few weeks to establish these habits, so try implementing them gradually.