Toxicology Exam Questions With Insightful &
Valid Solutions 2025\2026 A+ Grade.
Sodium channel inhibition
- accurate answer-Mechanism of action for local anesthetics.
Maximum lidocaine dose
- accurate answer-5 mg/kg is the recommended maximum dose.
Local Anesthetic Systemic Toxicity (LAST)
- accurate answer-Most commonly caused by intravascular injection.
Methemoglobinemia diagnosis
- accurate answer-Methemoglobin concentration is the key investigation.
Benzocaine
- accurate answer-Local anesthetic commonly associated with
methemoglobinemia.
Methylene blue
- accurate answer-Antidote used to treat methemoglobinemia.
Intravenous lipid emulsion
- accurate answer-Initial treatment for LAST with cardiovascular instability.
Paresthesias and dizziness
- accurate answer-First symptoms typically seen in LAST.
Bupivacaine
- accurate answer-Local anesthetic with highest cardiotoxic potential.
Inhalation
- accurate answer-Most toxic route for elemental mercury exposure.
Methylmercury
- accurate answer-Form of mercury linked to severe neurological effects.
,Neuropsychiatric symptom
- accurate answer-Hallmark of chronic mercury toxicity.
Spasticity and dysarthria
- accurate answer-Symptoms associated with methylmercury neurotoxicity.
24 hour urine mercury level
- accurate answer-Useful investigation to monitor chronic mercury exposure.
Diarrhea and renal failure
- accurate answer-Classic sign of acute inorganic mercury ingestion.
Lactic acidosis
- accurate answer-Primary life-threatening complication of metformin
toxicity.
Chelation therapy
- accurate answer-First step in managing subcutaneous mercury injection.
Cardiac arrhythmia
- accurate answer-Life-threatening complication associated with metformin
toxicity.
Gastric lavage
- accurate answer-Not appropriate for asymptomatic lidocaine ingestion.
Discharge without observation
- accurate answer-Management for asymptomatic child after lidocaine
ingestion.
Use adhesive tape
- accurate answer-Correct advice for cleaning mercury spill.
Hypoglycemia
- accurate answer-Potential complication of metformin toxicity.
Elemental mercury
- accurate answer-Most toxic form associated with inhalation.
,Metformin
- accurate answer-A medication used to treat type 2 diabetes.
Lactic acidosis
- accurate answer-A buildup of lactic acid in the body.
Haemodialysis
- accurate answer-A treatment for kidney failure to remove toxins.
Sodium bicarbonate
- accurate answer-Used to correct acidosis in lactic acidosis.
Activated charcoal
- accurate answer-Used to absorb toxins in overdose cases.
Metformin toxicity
- accurate answer-Adverse effects from excessive metformin intake.
Acute renal failure
- accurate answer-Sudden loss of kidney function.
Chelating agent
- accurate answer-Substance that binds heavy metals for excretion.
Methotrexate
- accurate answer-A chemotherapy drug that can cause toxicity.
Folinic acid
- accurate answer-Antidote for methotrexate toxicity.
Toxicokinetics
- accurate answer-Study of how toxins are absorbed and processed.
Rapidly dividing cells
- accurate answer-Cells that proliferate quickly, like GI cells.
Bradycardia
- accurate answer-Abnormally slow heart rate.
, Stomatitis
- accurate answer-Inflammation of the mucous membrane in the mouth.
Dyspnoea
- accurate answer-Difficulty or labored breathing.
Lead poisoning
- accurate answer-Toxicity from lead exposure, affecting multiple systems.
Glucarpidase
- accurate answer-Enzyme used to treat methotrexate toxicity.
Blood lead level
- accurate answer-Measurement of lead concentration in the blood.
Serum methotrexate level
- accurate answer-Test to determine methotrexate concentration in blood.
Neutropenia
- accurate answer-Low levels of neutrophils in the blood.
Acute methotrexate overdose
- accurate answer-Excessive intake of methotrexate leading to toxicity.
Observation duration
- accurate answer-Time to monitor after metformin ingestion.
Kidney function
- accurate answer-The ability of kidneys to filter waste.
Hyperglycemia
- accurate answer-High blood sugar levels.
Lead poisoning
- accurate answer-Toxicity caused by lead accumulation in the body.
EDTA
- accurate answer-Preferred chelator for lead poisoning treatment.
Valid Solutions 2025\2026 A+ Grade.
Sodium channel inhibition
- accurate answer-Mechanism of action for local anesthetics.
Maximum lidocaine dose
- accurate answer-5 mg/kg is the recommended maximum dose.
Local Anesthetic Systemic Toxicity (LAST)
- accurate answer-Most commonly caused by intravascular injection.
Methemoglobinemia diagnosis
- accurate answer-Methemoglobin concentration is the key investigation.
Benzocaine
- accurate answer-Local anesthetic commonly associated with
methemoglobinemia.
Methylene blue
- accurate answer-Antidote used to treat methemoglobinemia.
Intravenous lipid emulsion
- accurate answer-Initial treatment for LAST with cardiovascular instability.
Paresthesias and dizziness
- accurate answer-First symptoms typically seen in LAST.
Bupivacaine
- accurate answer-Local anesthetic with highest cardiotoxic potential.
Inhalation
- accurate answer-Most toxic route for elemental mercury exposure.
Methylmercury
- accurate answer-Form of mercury linked to severe neurological effects.
,Neuropsychiatric symptom
- accurate answer-Hallmark of chronic mercury toxicity.
Spasticity and dysarthria
- accurate answer-Symptoms associated with methylmercury neurotoxicity.
24 hour urine mercury level
- accurate answer-Useful investigation to monitor chronic mercury exposure.
Diarrhea and renal failure
- accurate answer-Classic sign of acute inorganic mercury ingestion.
Lactic acidosis
- accurate answer-Primary life-threatening complication of metformin
toxicity.
Chelation therapy
- accurate answer-First step in managing subcutaneous mercury injection.
Cardiac arrhythmia
- accurate answer-Life-threatening complication associated with metformin
toxicity.
Gastric lavage
- accurate answer-Not appropriate for asymptomatic lidocaine ingestion.
Discharge without observation
- accurate answer-Management for asymptomatic child after lidocaine
ingestion.
Use adhesive tape
- accurate answer-Correct advice for cleaning mercury spill.
Hypoglycemia
- accurate answer-Potential complication of metformin toxicity.
Elemental mercury
- accurate answer-Most toxic form associated with inhalation.
,Metformin
- accurate answer-A medication used to treat type 2 diabetes.
Lactic acidosis
- accurate answer-A buildup of lactic acid in the body.
Haemodialysis
- accurate answer-A treatment for kidney failure to remove toxins.
Sodium bicarbonate
- accurate answer-Used to correct acidosis in lactic acidosis.
Activated charcoal
- accurate answer-Used to absorb toxins in overdose cases.
Metformin toxicity
- accurate answer-Adverse effects from excessive metformin intake.
Acute renal failure
- accurate answer-Sudden loss of kidney function.
Chelating agent
- accurate answer-Substance that binds heavy metals for excretion.
Methotrexate
- accurate answer-A chemotherapy drug that can cause toxicity.
Folinic acid
- accurate answer-Antidote for methotrexate toxicity.
Toxicokinetics
- accurate answer-Study of how toxins are absorbed and processed.
Rapidly dividing cells
- accurate answer-Cells that proliferate quickly, like GI cells.
Bradycardia
- accurate answer-Abnormally slow heart rate.
, Stomatitis
- accurate answer-Inflammation of the mucous membrane in the mouth.
Dyspnoea
- accurate answer-Difficulty or labored breathing.
Lead poisoning
- accurate answer-Toxicity from lead exposure, affecting multiple systems.
Glucarpidase
- accurate answer-Enzyme used to treat methotrexate toxicity.
Blood lead level
- accurate answer-Measurement of lead concentration in the blood.
Serum methotrexate level
- accurate answer-Test to determine methotrexate concentration in blood.
Neutropenia
- accurate answer-Low levels of neutrophils in the blood.
Acute methotrexate overdose
- accurate answer-Excessive intake of methotrexate leading to toxicity.
Observation duration
- accurate answer-Time to monitor after metformin ingestion.
Kidney function
- accurate answer-The ability of kidneys to filter waste.
Hyperglycemia
- accurate answer-High blood sugar levels.
Lead poisoning
- accurate answer-Toxicity caused by lead accumulation in the body.
EDTA
- accurate answer-Preferred chelator for lead poisoning treatment.
