The term "chasing the dragon" or "chasing dragons" refers to a situation where someone is repeating a theme or pattern in life hoping to find the same results experienced a prior time. An experience of significant impact is the
catalyst associated with good times, improvements, enhancements,
happiness, pleasures, dreams coming
true, etc. One is said to be chasing dragons when they seek to repeat this pattern hoping for the same results experienced the first time.
He has been chasing the dragon or chasing
dragons looking for another high school
sweetheart ever since they broke up.
That band has been chasing the dragon since their first
single looking for another hit.