Drug of choice in theophylline poisoning:
**Core Concept**
Theophylline is a methylxanthine drug used in the management of asthma and chronic obstructive pulmonary disease (COPD). In the event of poisoning, it is essential to choose an appropriate antidote to counteract its toxic effects.
**Why the Correct Answer is Right**
The drug of choice in theophylline poisoning is **activated charcoal**. Activated charcoal is an effective adsorbent that can bind to theophylline, thereby reducing its absorption from the gastrointestinal tract. This is particularly useful when administered within one hour of ingestion. Additionally, **fomepizole** may be considered as an antidote in cases where theophylline is metabolized to its toxic metabolite, 3-methylxanthine.
**Why Each Wrong Option is Incorrect**
**Option A:** **Penicillin** is an antibiotic and has no role in the management of theophylline poisoning.
**Option B:** **Flumazenil** is a benzodiazepine receptor antagonist used to reverse benzodiazepine overdose, not theophylline poisoning.
**Option C:** **Naloxone** is an opioid receptor antagonist used to reverse opioid overdose, and it has no role in the management of theophylline poisoning.
**Clinical Pearl / High-Yield Fact**
Activated charcoal is most effective when administered within one hour of ingestion. This highlights the importance of prompt medical evaluation and treatment in cases of suspected medication overdose.
**Correct Answer:** A. Activated charcoal.