What is often required to manage severe toxic effects?

Supportive care or emergency interventions are required to manage severe toxic effects because these approaches focus on stabilizing the patient's condition and addressing life-threatening symptoms. Toxic effects from medications can lead to serious complications, such as respiratory distress, cardiac issues, or neurological problems, which often necessitate immediate medical attention. Supportive care may involve administering intravenous fluids, oxygen, or medications to counteract the toxicity, along with monitoring vital signs and providing necessary interventions to ensure the patient's safety.

The other options do not provide adequate management for severe toxic effects. Increased dosage of medication could exacerbate the toxicity rather than alleviate it, while over-the-counter treatment and home remedies typically lack the necessary efficacy and safety for serious medical emergencies.