The intensity of these symptoms depends on how much of the drug was taken, how often and for how long. These symptoms are,usually strongest 24 to 72 hours after onset and can persist for seven to 10 days. Sometimes sleeplessness and craving for the drug can last for several months. Opiates are harmful to a developing fetus. Pregnant women who are dependent on opiates have a higher risk for spontaneous abortions, breech deliveries, premature births and stillbirths.
Babies born to opiate-addicted mothers often have withdrawal symptoms similar to adults.
These symptoms may last several weeks or months.