A nurse is admitting a client into an inpatient mental health facility.

Choice A reason (Speech): Slurred speech is a classic sign of opioid intoxication due to central nervous system depression. Opioids impair coordination and slow neurological processing, leading to slowed or slurred speech. Stimulants and hallucinogens typically do not cause slurred speech; stimulants often cause pressured or rapid speech, while hallucinogens may cause disorganized or bizarre speech patterns. Choice B reason (Heart rate): Opioid intoxication often results in bradycardia due to CNS depression. In contrast, stimulants such as cocaine or amphetamines cause tachycardia because of sympathetic nervous system activation. Hallucinogens, including LSD or PCP, can also cause tachycardia due to autonomic instability. Thus, heart rate changes can be consistent with multiple substances depending on whether it is slowed or elevated. Choice C reason (Pupils): Opioid intoxication typically causes pinpoint (constricted) pupils, which is a hallmark sign. Stimulants, such as cocaine or methamphetamine, cause dilated pupils due to sympathetic stimulation. Hallucinogens also frequently cause dilated pupils because of their effects on serotonin and sympathetic pathways. Therefore, pupil findings can point to different categories depending on the presentation. Choice D reason (Blood pressure): Opioids often cause hypotension due to vasodilation and CNS depression. Stimulants cause hypertension because of increased sympathetic activity. Hallucinogens can cause variable blood pressure changes, sometimes elevated due to autonomic stimulation or decreased depending on the substance and dose. This makes blood pressure changes consistent with all three categories depending on the clinical picture. Choice E reason (Tremors): Tremors are not typical of opioid intoxication but are common with stimulants due to excessive sympathetic activity and neuromuscular excitation. Hallucinogens can also cause tremors because of their effects on serotonin and dopamine pathways, leading to neuromuscular instability. Tremors therefore align with stimulant and hallucinogen intoxication but not opioids.