Relating to criminal penalties and defenses to prosecution for certain drug possession and drug paraphernalia offenses.

HB 1790 modifies Texas law to limit when individuals charged with certain drug possession or paraphernalia offenses can use a defense claiming they called for emergency medical assistance during a potential overdose. The bill specifically adds circumstances where this defense is unavailable, such as if police were arresting the person at the time of the medical request, if the person is committing other drug-related offenses (like possession under Sections 481.115(b) or 481.116(b)), or if they previously used this defense or made multiple medical requests within 18 months. It directly affects people facing prosecution for drug offenses who attempt to invoke this medical assistance defense. The changes tighten restrictions on using medical requests as a legal defense, making prosecution more likely in these specific scenarios.