ToxicologyClinical presentation

Stimulant toxicity

A streamlined, differential-led presentation for rapid clinical review.

Clinical snapshot

Twenty-second review

Sympathomimetic drugs increase catecholamine activity, causing agitation, tachycardia, hypertension, vasoconstriction, hyperthermia, ischemia, seizure, and metabolic stress.
Hyperthermia, chest pain, severe hypertension with organ signs, seizure, dysrhythmia, shock, or extreme agitation is time-sensitive.
Keep mania, panic, or hypoglycemia in the differential; overlapping or concurrent illness remains possible.
For stimulant toxicity, trends and combinations of findings are more informative than one isolated vital sign.

Differentials

Compare the clinical patterns

The repeated material is grouped inside each possibility. Open only the condition you need.

Serious4 conditions

ACSTime-sensitive high-risk possibility

HPI

Clarify substance, amount and timing; chest pain or palpitations; temperature and agitation.

Signs & symptoms

Chest pain, focal deficit, seizure, or organ dysfunction.

Focused exam

Assess pupils, skin, bowel sounds, temperature, mental status, respiratory pattern, rhythm, and signs of trauma or concealed co-ingestion; Repeat observations because drug effects may evolve.

Brief pathophysiology

ACS may cause stimulant toxicity through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Acute coronary syndrome frequently presents without a diagnostic vital-sign pattern. Abnormal observations suggest complications; normal observations do not exclude ischemia.

Blood pressure (mmHg)

High, normal, or low

Pain may elevate pressure; hypotension suggests major infarction or complication.

Heart rate (bpm)

High, normal, or low

Ischemia, conduction disturbance, medication, and autonomic response all affect rate.

Respiratory rate (breaths/min)

May rise

Tachypnea can reflect pain, heart failure, or shock.

Oxygen saturation (SpO₂)

Often preserved

Low SpO₂ suggests pulmonary edema or concurrent respiratory disease; normal does not exclude ACS.

Front-load in the triage report

ACS: Chest pain, focal deficit, seizure, or organ dysfunction.
Substance, amount and timing?
Chest pain or palpitations?

Aortic emergencyTime-sensitive high-risk possibility

HPI

Clarify chest pain or palpitations; temperature and agitation; seizure or severe headache.

Signs & symptoms

Chest pain, focal deficit, seizure, or organ dysfunction.

Focused exam

Repeat observations because drug effects may evolve; Assess temperature, skin moisture, pupils, rhythm, chest and neurologic findings, trauma, co-ingestants, and duration of exertion or restraint.

Brief pathophysiology

Aortic emergency may cause stimulant toxicity through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Aortic catastrophe has no single required vital pattern. Measure pressure and pulses carefully; shock or a new inter-arm difference raises concern but may be absent.

Blood pressure (mmHg)

May be high or low

Hypertension may coexist; hypotension suggests rupture, tamponade, or malperfusion.

Heart rate (bpm)

Variable

Pain may raise rate, while medications or reflexes can blunt it.

Pulse pressure (mmHg)

Compare pulses / arms

A calculated pulse pressure is less specific than pulse deficits and appropriate bilateral BP assessment.

MAP (mmHg)

Trend perfusion

A falling MAP supports hemodynamic deterioration.

Front-load in the triage report

Aortic emergency: Chest pain, focal deficit, seizure, or organ dysfunction.
Chest pain or palpitations?
Temperature and agitation?

StrokeTime-sensitive high-risk possibility

HPI

Clarify temperature and agitation; seizure or severe headache; co-ingestants.

Signs & symptoms

Chest pain, focal deficit, seizure, or organ dysfunction.

Focused exam

Repeat observations because drug effects may evolve; Assess temperature, skin moisture, pupils, rhythm, chest and neurologic findings, trauma, co-ingestants, and duration of exertion or restraint.

Brief pathophysiology

Stroke may cause stimulant toxicity through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Stroke is a clinical diagnosis supported by time course and neurologic findings. Blood pressure and glucose affect eligibility and mimics; normal vitals do not exclude stroke.

Blood pressure (mmHg)

Often elevated

Hypertension is common in acute stroke; hypotension suggests another cause or poor perfusion.

Blood glucose (mmol/L)

Check every patient

Hypoglycemia can mimic focal deficit; hyperglycemia may accompany stress or diabetes.

Heart rate (bpm)

Assess rate / rhythm

An irregular rhythm may suggest atrial fibrillation but is not required.

Oxygen saturation (SpO₂)

Usually preserved

Hypoxemia requires correction and may indicate aspiration or another process.

Front-load in the triage report

Stroke: Chest pain, focal deficit, seizure, or organ dysfunction.
Temperature and agitation?
Seizure or severe headache?

Severe hyperthermiaTime-sensitive high-risk possibility

HPI

Clarify seizure or severe headache; co-ingestants; mental status and safety.

Signs & symptoms

Chest pain, focal deficit, seizure, or organ dysfunction.

Focused exam

Repeat observations because drug effects may evolve; Assess temperature, skin moisture, pupils, rhythm, chest and neurologic findings, trauma, co-ingestants, and duration of exertion or restraint.

Brief pathophysiology

Severe hyperthermia may cause stimulant toxicity through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Heat stroke requires central nervous system dysfunction with severe hyperthermia; skin feel and peripheral measurements may be misleading. Treat rapidly when the clinical picture supports it.

Temperature (°C)

Markedly elevated

Use the most reliable temperature method available; heat stroke is a clinical emergency.

Heart rate (bpm)

Usually elevated

Tachycardia supports increased heat load and circulatory stress.

Blood pressure (mmHg)

May fall

Vasodilation and dehydration can produce hypotension.

Respiratory rate (breaths/min)

Often elevated

Tachypnea is common with heat stress and metabolic demand.

Front-load in the triage report

Severe hyperthermia: Chest pain, focal deficit, seizure, or organ dysfunction.
Seizure or severe headache?
Co-ingestants?

Common1 condition

Stimulant intoxicationCommon presentation pattern

HPI

Clarify substance, amount and timing; chest pain or palpitations; temperature and agitation.

Signs & symptoms

Agitation, mydriasis, sweating, tachycardia, and hypertension may fit.

Focused exam

Assess pupils, skin, bowel sounds, temperature, mental status, respiratory pattern, rhythm, and signs of trauma or concealed co-ingestion; Repeat observations because drug effects may evolve.

Brief pathophysiology

Stimulant intoxication may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.

Vital-sign pattern

What the trend may show

Possible pattern

Autonomic excess can produce tachycardia, hypertension, hyperthermia, and tachypnea. Marked temperature elevation or deterioration is a time-critical finding.

Heart rate (bpm)

Often elevated

Tachycardia is common with sympathetic activation.

Blood pressure (mmHg)

Often elevated

Hypertension is common, though collapse or mixed toxicity can lower pressure.

Temperature (°C)

May rise dangerously

Hyperthermia signals severe toxicity and requires urgent management.

Respiratory rate (breaths/min)

Often elevated

Tachypnea may reflect agitation, hyperthermia, or metabolic acidosis.

Front-load in the triage report

Agitation, mydriasis, sweating, tachycardia, and hypertension may fit.
Substance, amount and timing?
Chest pain or palpitations?

Mimics3 conditions

ManiaImportant alternative presentation

HPI

Clarify substance, amount and timing; chest pain or palpitations; temperature and agitation.

Signs & symptoms

Behavioural symptoms may have psychiatric or metabolic causes.

Focused exam

Assess pupils, skin, bowel sounds, temperature, mental status, respiratory pattern, rhythm, and signs of trauma or concealed co-ingestion; Repeat observations because drug effects may evolve.

Brief pathophysiology

Mania can resemble stimulant toxicity through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Autonomic excess can produce tachycardia, hypertension, hyperthermia, and tachypnea. Marked temperature elevation or deterioration is a time-critical finding.

Heart rate (bpm)

Often elevated

Tachycardia is common with sympathetic activation.

Blood pressure (mmHg)

Often elevated

Hypertension is common, though collapse or mixed toxicity can lower pressure.

Temperature (°C)

May rise dangerously

Hyperthermia signals severe toxicity and requires urgent management.

Respiratory rate (breaths/min)

Often elevated

Tachypnea may reflect agitation, hyperthermia, or metabolic acidosis.

Front-load in the triage report

Behavioural symptoms may have psychiatric or metabolic causes.
Substance, amount and timing?
Chest pain or palpitations?

PanicImportant alternative presentation

HPI

Clarify chest pain or palpitations; temperature and agitation; seizure or severe headache.

Signs & symptoms

Behavioural symptoms may have psychiatric or metabolic causes.

Focused exam

Repeat observations because drug effects may evolve; Assess temperature, skin moisture, pupils, rhythm, chest and neurologic findings, trauma, co-ingestants, and duration of exertion or restraint.

Brief pathophysiology

Panic can resemble stimulant toxicity through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Anxiety may cause tachycardia and tachypnea, but it is a diagnosis of exclusion when symptoms are new or severe. Hypoxemia, fever, or hypotension suggests another or concurrent cause.

Respiratory rate (breaths/min)

Often rises

Rapid breathing is common during panic or hyperventilation.

Heart rate (bpm)

Often rises

Autonomic arousal commonly causes tachycardia.

Oxygen saturation (SpO₂)

Usually normal

Low saturation is not explained by uncomplicated panic.

Blood pressure (mmHg)

Normal or mildly high

A modest rise may occur; hypotension warrants broader assessment.

Front-load in the triage report

Behavioural symptoms may have psychiatric or metabolic causes.
Chest pain or palpitations?
Temperature and agitation?

HypoglycemiaImportant alternative presentation

HPI

Clarify temperature and agitation; seizure or severe headache; co-ingestants.

Signs & symptoms

Behavioural symptoms may have psychiatric or metabolic causes.

Focused exam

Repeat observations because drug effects may evolve; Assess temperature, skin moisture, pupils, rhythm, chest and neurologic findings, trauma, co-ingestants, and duration of exertion or restraint.

Brief pathophysiology

Hypoglycemia can resemble stimulant toxicity through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Confirm low capillary glucose and reassess after treatment. Adrenergic signs may be absent in recurrent hypoglycemia or blunted by medications.

Blood glucose (mmol/L)

< 4.0 mmol/L

BCEHS defines hypoglycemia as blood glucose below 4.0 mmol/L.

Heart rate (bpm)

May rise

Adrenergic activation commonly produces tachycardia, but this is not universal.

Blood pressure (mmHg)

Often preserved

Blood pressure is not a reliable discriminator; hypotension suggests another or additional process.

Temperature (°C)

May fall

Hypothermia can accompany prolonged or severe hypoglycemia.

Front-load in the triage report

Behavioural symptoms may have psychiatric or metabolic causes.
Temperature and agitation?
Seizure or severe headache?

Red flags

Findings that should escalate concern

Hyperthermia
Chest pain
Seizure
Severe agitation with exhaustion
Hyperthermia, chest pain, severe hypertension with organ signs, seizure, dysrhythmia, shock, or extreme agitation is time-sensitive.
ACS, aortic emergency, stroke, or severe hyperthermia: Chest pain, focal deficit, seizure, or organ dysfunction.

Related medications

Medication recognition

Levetiracetam Lamotrigine Valproic acid

Continue the clinical pathway

References

Clinical and academic sources

Curated clinical guidance and peer-reviewed evidence supporting this presentation. Current BCEHS guidance, medical direction, and local policy remain authoritative for practice.

BCEHS Handbook — specific CPGs

J01: Approach to Chemical or Toxic ExposuresBC Emergency Health Services Handbook
Official BCEHS clinical practice guidance for approach to chemical or toxic exposures.