Which category includes pharmaceutical gases such as nitrous oxide and halothane, as well as compressed gases such as oxygen or carbon dioxide?

Which category includes pharmaceutical gases such as nitrous oxide and halothane, as well as compressed gases such as oxygen or carbon dioxide?

• A. Ophthalmic drugs
• B. Otic drugs
• C. Emulsions
• D. Gaseous drugs

Answer: (D)

Gaseous drugs are classified by their physical form as gases used for therapeutic purposes. This category includes substances like nitrous oxide and halothane, which are inhaled gases used in anesthesia, as well as compressed gases such as oxygen and carbon dioxide that are stored and administered in gas form for medical uses. The key idea is that the grouping is based on the substance being a gas rather than how it’s delivered or what it’s used for. Ophthalmic drugs are formulated for the eye and typically come as solutions, suspensions, or ointments targeted to ocular tissues. Otic drugs are intended for the ear, also usually in liquid or soft form. Emulsions are mixtures of two immiscible liquids, not gases. Therefore, the category that best fits both volatile agents like halothane and gases under pressure like oxygen and carbon dioxide is gaseous drugs.

Gaseous drugs are classified by their physical form as gases used for therapeutic purposes. This category includes substances like nitrous oxide and halothane, which are inhaled gases used in anesthesia, as well as compressed gases such as oxygen and carbon dioxide that are stored and administered in gas form for medical uses. The key idea is that the grouping is based on the substance being a gas rather than how it’s delivered or what it’s used for.

Ophthalmic drugs are formulated for the eye and typically come as solutions, suspensions, or ointments targeted to ocular tissues. Otic drugs are intended for the ear, also usually in liquid or soft form. Emulsions are mixtures of two immiscible liquids, not gases. Therefore, the category that best fits both volatile agents like halothane and gases under pressure like oxygen and carbon dioxide is gaseous drugs.