When it comes to possession of a controlled substance, Texas is strict. However, there are potential defenses to help you avoid a conviction. When you work with our Houston drug possession attorneys, we strive to build a strong defense. Our goal is always to pursue the best possible outcome for your case. Below, we list a few potential defenses common to drug possession cases. Valid Prescription Among the controlled substances in Texas, there are a few that are legal to possess with a valid prescription from a doctor. When you face charges for possession but have a valid prescription prior to your arrest, you have a strong defense against possession of a controlled substance. Lack of Knowledge of Possession As mentioned above, a conviction for possession of a controlled substance requires that you knowingly possess the drug. If you were unaware that the drugs were in your possession, you may have a defense. Alternatively, if you did not know the substance was illegal, that is another potential defense. Not Intended for Human Consumption While substances have legal controls for human use, some have exemptions for use with animals. However, for this to be a valid defense, it requires some type of authorization. Insufficient Amount For a conviction of drug possession, there has to be a “usable amount” of a drug. Typically, this means a high enough amount to allow for lab testing. In certain cases, the search results in an amount of narcotics so small that a lab cannot properly test it. If that’s the case, you may have a defense.