Misusing prescription drugs can be harmful to your health and impact participation in sports. Only take medications that are prescribed to you and follow instructions form the doctor carefully. Prescription drugs and over the counter drugs, including sleeping pills, anti-anxiety drugs, and cough and cold remedies can be harmful to your health if they are not taken as prescribed. Do not take any medications that are prescribed to someone else as the side effects may include nausea, dizziness, loss of appetite or vision loss.