Which medication can be used as an antidote for theophylline toxicity?

The use of a beta blocker can be relevant in managing the cardiovascular symptoms associated with theophylline toxicity, particularly if the patient is experiencing tachyarrhythmias or significant hypertension. Theophylline increases heart rate and myocardial contractility through its action as a phosphodiesterase inhibitor and adenosine receptor antagonist. Therefore, beta blockers can help mitigate these symptoms by inhibiting the adrenergic stimulation of the heart, thus providing a means to stabilize the patient's cardiac function.

While other options like glucagon and charcoal can play roles in medical management, they are not specifically designed to counteract the effects of theophylline. Glucagon may be more useful in certain cases of beta blocker overdose, and charcoal is primarily effective as a method for reducing gastrointestinal absorption when administered shortly after ingestion of a toxic substance. Hydration is also important in supportive care, especially for kidney function restoration or preventing dehydration, but it does not address the specific cardiovascular effects of theophylline toxicity directly.

In summary, utilizing a beta blocker in the context of theophylline toxicity targets the particular harmful effects on the cardiovascular system, making it a suitable antidote in these scenarios.