The first time I took this, I was also on the day taking Eternus. I took the 4 capsules about 2 hours before bed. I went to bed around 11:30 PM. Interestingly, I didn't feel tired at bedtime and I had a vivid dream during. I woke up around 3:30 in the morning and had a hard time going back to sleep. I finally fell asleep and woke up around 8 AM but feeling tired. Day 2, I took it again before bed and slept the entire night, and woke up refreshed. Day 3, I had interrupted sleep again but I wok...Read more.