In clinical studies the numbers are unusual for a sleep aid: DSIP increased total sleep time by about 59% in one trial, normalized sleep in people with chronic insomnia in another, and, most strikingly, several of those patients kept normal sleep for 3 to 7 months after their last injection
If it was exposed to heat during shipping or storage, or if it is well past its expiration date, the lyophilized powder may have undergone chemical changes that prevent proper dissolution
1 This makes it difficult to perform activities that require skill and concentration, or where the safety of others is involved
It is unknown whether the same effect occurs in people
Frequency depends on the clinical reason for treatment
This is typically short-lived and should subside within a few hours after the injection