The exact mechanism of an overdose depends on the substance being abused, but generally an overdose overwhelms your body with too much of the drug. During a cocaine overdose, for example, you may experience raises in heart rate, blood pressure, body temperature, and your breathing. In general, an overdose takes whatever is enjoyable about a high and increases it so much that it becomes distressing and, in some cases, life-threatening.
Take your first step towards recovery.
