T46.5X4

Clinical Causes: Accidental overdose of antihypertensive medications due to misreading prescriptions or dosage errors. Intentional overdose in cases of self-harm or suicide attempts involving antihypertensive drugs. Incorrect medication use, such as taking higher doses than prescribed. Unsuspected drug interactions that increase the effects of antihypertensive medications, leading to toxicity. Use of unregulated or counterfeit medications containing antihypertensive substances.

Key Symptoms: Dizziness or lightheadedness, especially when standing up Fainting or feeling faint Slow or irregular heartbeat (bradycardia or arrhythmias) Low blood pressure (hypotension) Nausea and vomiting Fatigue or weakness Blurred vision Confusion or difficulty concentrating Shortness of breath in severe cases Seizures in extreme instances

Diagnosis Path: Diagnosis involves a detailed medical history, including recent medication use, and physical examination. Blood tests can confirm the presence of antihypertensive drugs or their metabolites, and blood pressure measurements help assess the severity of hypotension. Additional tests may include ECGs to detect cardiac arrhythmias. Medical professionals may also evaluate kidney function and electrolyte levels to understand the full scope of poisoning effects.

Treatment Protocols: Management of poisoning caused by antihypertensive drugs typically requires prompt medical attention. Treatment options include: - **Monitoring vital signs** closely to assess blood pressure, heart rate, and respiratory status - **Gastrointestinal decontamination** such as activated charcoal, if administered early - **Intravenous fluids** to stabilize blood pressure and maintain hydration - **Medications** to counteract the effects, like vasopressors for hypotension or atropine for bradycardia - **Continuous cardiac monitoring** to detect and treat arrhythmias promptly - **Supportive care** based on the severity of symptoms, which may include oxygen therapy or mechanical ventilation in critical cases - **Psychological support or psychiatric evaluation** if poisoning was intentional Further intervention might sometimes involve specific antidotes, but their use depends on the particular medication involved and is often guided by healthcare professionals.