The Texas Controlled Substances Act classifies four groups of drugs with marijuana in a fifth group by itself. The state has strict laws regarding drug possession, but a defense lawyer has some options for providing a focused defense for a client who faces drug charges. One of them is that the defendant might not have known that he or she possessed the drug in the first place.
Additionally, if the defendant was aware of the drug's presence, it might have been in the defendant's possession for use on animals or for another purpose, not for human consumption. The drug might also be pending approval for possible medical use, or the defendant might not have been in possession of enough of the drug for authorities to press charges. Finally, medical marijuana and other prescriptions in the client's name are also other valid defenses for drug possession.