Drugs on CNS

• Tik (Methamphetamine)

  Agonist of dopamine and norepinephrine receptors, causing increased energy, excitement, depression, and cardiovascular problems. Can lead to stroke and seizures.
• Ecstasy

  Releases serotonin, dopamine, and norepinephrine, causing increased energy, excitement, mood elevation, and altered senses. Can lead to cerebral hypoxia and hyperthermia.
• Heroin

  Strong agonist of μ-opioid receptors, causing euphoria, relief from pain, sedation, and respiratory depression. Can be physically addictive and lead to overdose.
• Dagga

  Stimulates CB1 receptors in the brain and spinal cord, causing euphoria, relaxation, slowed reaction time, and increased appetite. Can be addictive due to dependence on the dopamine reward system.
• Astigmatism

  A type of refractive error caused by an irregularly shaped cornea or lens, resulting in blurred or distorted vision at all distances. Can be treated with:
• Cataracts

  A clouding of the lens in the eye that affects vision. Most common type of age-related vision impairment in older adults. Causes:
• Glasses

  Treatment for refractive errors such as:
• Surgery

  Treatment for various eye disorders, including: