Acetazolamide is the commonly prescribed oral and intravenous carbonic anhydrase inhibitor; over the years, its use in clinical practice has decreased in favor of more recent drugs. However, it is a rather handy drug, which can be useful in several clinical settings when managing critically ill patients. The objective of this review is the evaluation of the most recent evidence on the use of acetazolamide in emergency medicine and critical care medicine. Furthermore, the safety profile of this drug has been evaluated. This is a narrative review on the use of acetazolamide in the main contexts in which this drug can be useful in emergency situations for patients with potential critical issues. For the timeline 1999-2024, a search was conducted on the main scientific platforms; resources of greatest relevance for the use of acetazolamide in critical care and emergency medicine were selected. The most common emergency situations in which a critically ill patient could benefit from acetazolamide therapy are acute heart failure, acute mountain sickness, post hypercapnic metabolic alkalosis, idiopathic intracranial hypertension and acute angle-closure glaucoma. In a few cases, however, randomized controlled clinical trials have been conducted. There are also other less solid indications based mostly on experience or retrospective data. Acetazolamide seems to be an overall safe drug; serious side effects are rare and can be avoided by carefully selecting the patients to be treated. Acetazolamide represents a precious resource for emergency physicians and intensivists; critical patients with different conditions can in fact benefit from it; furthermore, acetazolamide is a safe drug if administered to correctly selected patients.

Cancer is one of the most frequently diagnosed diseases, and despite the continuous efforts in searching for new and more effective treatments, its morbidity and mortality remain a significant health problem worldwide. Calorie restriction, a dietary manipulation that consists in a reduction of the calorie intake, is gaining attention as a potential adjuvant intervention for preventing and/ or fighting cancer. Several forms of energy reduction intake, which includes caloric restriction tout-court, dietary restrictions, and intermittent fasting, are being explored for their ability to prevent or slow down cancer progression. Additionally, another anti-cancer approach being under investigation relies on the use of nutraceuticals known as “Caloric Restriction Mimetics” that can provide caloric restriction-mediated benefits without subjecting the patients to a strict diet. Preclinical in vitro and in vivo studies consistently show that diet modifiers reducing the calorie have impact on tumor microenvironment and cancer metabolism, resulting in reduced growth and progression of cancer. Preliminary clinical studies show that patients subjected to a reduced nutrient/energy intake experience improved outcomes from chemo- and radiotherapy while better tolerating the side effects. Here, we review the state of the art on the therapeutic potential of calorie restriction and of caloric restriction mimetics in preventing or retarding tumor development by modulating a subset of cellular processes. The most recent clinical progresses with caloric restriction mimetics in the clinical practice are also discussed.