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…showed last 75 words of 260 total…to get the same effects as before. Higher doses greatly increase the risk of a "bad trip" and troubling flashbacks. This distorted reality can cause users to hurt themselves or commit suicide to escape them. Tolerance to the drugs increases the likelihood of an overdose. Overdoses can result in convulsions, coma, and heart and lung failure. To make it worse those who abuse hallucinogens often abuse other drugs to adding to the danger of addiction.