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Caffeine is a naturally occurring central nervous system stimulant belonging to the methylxanthine class and is widely recognized as the most utilized psychoactive stimulant worldwide. Although this drug is most commonly sourced from coffee beans, it can also naturally occur in certain types of tea and cacao beans and as an additive to soda and energy drinks. Caffeine consumption primarily alleviates fatigue and drowsiness but has numerous additional therapeutic applications. The US Food and Drug Administration (FDA) has approved caffeine for treating apnea of prematurity. Off-label uses of caffeine include the treatment of migraines and post-dural puncture headaches, as well as enhancing athletic performance, particularly in endurance sports. This activity centers on the mechanism of action, adverse event profile, toxicity, dosing, and monitoring of caffeine, empowering clinicians to identify potential adverse reactions, make informed prescribing decisions, and mitigate risks effectively. This activity underscores how the interprofessional healthcare team's comprehensive knowledge of caffeine's indicated and off-label uses contributes to enhanced patient outcomes. Objectives: Identify appropriate indications for caffeine therapy in clinical practice, including but not limited to apnea of prematurity, migraines, and post-dural puncture headaches. Implement evidence-based strategies for dosing caffeine, considering individual patient characteristics and therapeutic goals. Apply knowledge of caffeine's mechanism of action and pharmacokinetics to make informed prescribing decisions and monitor treatment efficacy. Collaborate with interprofessional healthcare team members to ensure comprehensive patient care, particularly in populations with unique caffeine-related considerations, such as pregnant women and infants. Access free multiple choice questions on this topic.

Signs and Symptoms of Overdose Caffeine consumption is generally regarded as safe. Additive caffeine in most substances does not necessitate FDA approval as long as consumption remains within safe levels stipulated by the statute. A typical dose of caffeine is around 70 to 100 mg per drink. While there is no recommended daily allowance for caffeine, doses of up to 400 mg/d are deemed safe.[54] The exact LD50 for humans varies and largely depends on individual sensitivity to caffeine. However, the estimated LD50 is between 150 and 200 mg/kg. Case reports indicate that doses as low as 57 mg/kg have resulted in fatalities. A toxic dose of caffeine, where significant adverse effects such as tachycardia, arrhythmia, altered mentation, and seizures may occur, is estimated to be around 1.2 g. The estimates of a life-threatening dose of caffeine range from 10 to 14 g. Management of Overdose The treatment for mild ingestions primarily involves supportive care. However, in cases of more severe ingestions, additional interventions may be necessary. Patients may require intubation to protect the airway from vomiting or altered mental status. Benzodiazepines can be administered to abort any seizures that develop. If IV fluid resuscitation fails to address persistent hypotension, patients may need vasopressors. Phenylephrine or norepinephrine is typically the first-line vasopressor, with phenylephrine being preferable due to its α-agonism and reflex bradycardia. Magnesium and β-blockers can combat cardiac arrhythmias secondary to the hyperadrenergic response.[55] The ultra-short-acting β1-selective blocker esmolol has been used successfully in several case reports for this indication. In the case of lethal arrhythmias, patients will require defibrillation and resuscitation according to advanced cardiac life support protocols.[45] Additionally, activated charcoal, intralipid infusion, and hemodialysis can aid in preventing further metabolism and subsequent effects of caffeine overdose.[36][56]

Caffeine consumption is generally considered safe in moderate amounts. However, the prevalence of high-energy drinks containing excessive caffeine levels has escalated the problem of caffeine toxicity.[57] These concentrated caffeinated beverages pose a significant risk on their own, but the danger escalates when combined with other illicit substances such as tobacco and alcohol. In recent years, numerous fatalities have been reported following the ingestion of such combinations. Addressing caffeine toxicity or adverse effects necessitates the collaboration of an interprofessional healthcare team to achieve optimal outcomes. In cases where caffeine is used for apnea of prematurity, consultation with a pediatrician and admission to a neonatal intensive care unit may be necessary.[1] When using caffeine therapeutically, it is essential to inquire about other potential sources of caffeine to prevent toxicity. Healthcare team members are well-positioned to educate the public about the risks associated with high-energy drinks and related products. Clinicians, nursing staff, and pharmacists should be ready to offer counseling to patients who may be consuming excessive amounts of caffeine. While no absolute contraindications to caffeine exist, patients with cardiac disorders, panic disorder, anxiety, or elevated stress levels should be advised to avoid caffeine. An interprofessional healthcare team is well-equipped to educate patients appropriately in this regard.