Brief Answer: Due to Physical dependence and withdrawal symptoms Detailed Answer: Hello, All the opiate based drug like vicodin (oxycodone containing drug) can become habit forming and cause physical dependence. Anyone can experience dependence orwithdrawal symptoms if they have taken Vicodin of a period of time, usually several weeks or more. Depending on how much and for how long you have been taking Vicodin, the withdrawal symptoms can range from mile to very severe. Many patients, who used the vicodin only therapeutically as prescribed, sometimes do not even realize they are experiencing withdrawals. Thus how long do you take this vicodin? Tapering of vicodin dose must be small and continious. Waiting for your response.

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