Sleep disturbances are a common and debilitating issue among individuals with substance use disorders. Substances like alcohol, stimulants, and opioids disrupt natural sleep patterns, leading to insomnia, fragmented sleep, or hypersomnia. Prolonged substance use alters the brain's circadian rhythms and sleep architecture, often exacerbating mental health challenges such as anxiety and depression. Addressing sleep disturbances is a critical component of recovery, as poor sleep can increase the risk of relapse. Behavioral interventions like sleep hygiene education and cognitive-behavioral therapy for insomnia (CBT-I) are effective in restoring healthy sleep. Medications, such as melatonin agonists or sedating antidepressants, may also be considered. Treating sleep issues alongside addiction fosters better overall recovery outcomes.