You were treated for a calcium channel blocker medication overdose
These medications affect your heart rate and blood pressure
You were monitored closely and received treatments to stabilize your heart
Activity and rest
Rest at home for the next 24 to 48 hours
Avoid strenuous physical activity until cleared by your doctor
Medications
Do not take your blood pressure or heart medications unless directed by your doctor
A doctor will review and adjust your medication list before you leave
Warning signs: return to the emergency room immediately if you experience
Dizziness, lightheadedness, or fainting
May indicate low blood pressure or slow heart rate returning
Palpitations or feeling your heart beating slowly or irregularly
Chest pain or pressure
Shortness of breath
Confusion, extreme sleepiness, or difficulty waking
Nausea or vomiting that prevents you from taking medications
Any recurrence of symptoms you had when you came to the hospital
Follow-up appointments
See your primary care doctor within 1 week
Medication review and safe prescribing discussion
Blood pressure and heart rate check
Cardiology follow-up within 1 to 2 weeks if heart rhythm problems were detected
Mental health follow-up if this was an intentional overdose
Keep all scheduled mental health appointments
Contact your mental health team or crisis line if you feel unsafe
Medication safety at home
Store all medications in a locked cabinet out of reach of children
Even one or two tablets of heart medications can be fatal to a child
Use a pill organizer to prevent accidental double-dosing
Know the names and doses of all your medications
References
Guidelines and key sources
Primary guidelines
AHA 2025 Guidelines for CPR and Emergency Cardiovascular Care Part 10
Cao D et al. Circulation 2025
AHA 2025 recommendations for calcium, HDI, vasopressors, methylene blue, ILE, and ECMO in CCB toxicity
AHA 2023 Focused Update on Cardiac Arrest and Life-Threatening Toxicity
Lavonas EJ et al. Circulation 2023
Updated antidote recommendations and toxicologic cardiac arrest management
Expert Consensus Recommendations for CCB Poisoning Management
St-Onge M et al. Critical Care Medicine 2017
Stepwise treatment framework and decontamination guidance
ACC/AHA/HRS 2018 Bradycardia and Cardiac Conduction Delay Guideline
Kusumoto FM et al. Heart Rhythm 2019
Acute bradycardia management algorithm applicable to CCB toxicity
Key studies and reviews
Simpson MD, Cole JB. Current Opinion in Critical Care 2024
Epidemiology of CCB poisoning and management implications
Amlodipine as dominant agent; hyperglycemia severity markers
Graudins A, Lee HM, Druda D. British Journal of Clinical Pharmacology 2016
Antidotes and adjunct therapies for CCB and beta-blocker overdose
Levine M et al. Critical Care Medicine 2007
Hyperglycemia assessment after diltiazem or verapamil overdose
Peak glucose > 16.7 mmol/l as severity predictor
Megarbane B. British Journal of Clinical Pharmacology 2023
HDI before vasopressors and inotropes in CCB toxicity: expert position
Suarez F, Koyfman A, Long B. Journal of Emergency Medicine 2026
Pearls and pitfalls for emergency clinicians in CCB and beta-blocker toxicity
Hoegberg LCG et al. Clinical Toxicology 2026
Clinical Toxicology Recommendations Collaborative on activated charcoal
Abernethy DR, Schwartz JB. NEJM 1999
Foundational pharmacology of calcium-antagonist drugs
Coding and classification
ICD-10 T46.1 Poisoning by calcium-channel blockers
T46.1X1A intentional self-harm, initial encounter
T46.1X2A accidental poisoning, initial encounter
SNOMED CT concept for calcium channel blocker toxicity
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.