Vicodin is made up of hydrocodone and acetaminophen which is used in around the clock treatment of mild to moderately severe pain. Misuse of this drug in larger amounts than as needed can lead to overdose complications as well as use for a longer period can cause severe symptoms of drug dependence in the patients using it for treatment of pain. So, people are expected to gain a complete knowledge of dosage & effects of this drug before they buy Vicodin online and use it.