Answer :
Final answer:
Powders for internal use are classified under solid dosage forms. They offer flexibility for pharmaceutical research by allowing adjustments of variables like temperature and humidity, thereby providing insights into drug behaviors..Therefore, the correct answer is option A).
Explanation:
Powders for internal use, whether divided or undivided, are classified under solid dosage forms. This classification is based on the physical state of the dosage form when it is administered to the patient. Solid dosage forms include a variety of delivery systems, such as tablets, capsules, and, of course, powders. Powders have a distinct advantage in pharmaceutical applications, as they allow for the adjustment of critical variables like temperature, pressure, and humidity in real-time, providing valuable data on how a drug might respond to changes in these conditions. The form of a substance like a powder can also influence how it is absorbed and utilized by the body.
It's important to note that other dosage forms, such as semisolid dosage forms, liquid dosage forms, and parenteral dosage forms, are distinct categories with their own specific characteristics and applications. Wettable powders that are mixed with water before application are sometimes mistaken for liquid dosage forms due to their method of administration, but they are fundamentally solid dosage forms that require suspension in a liquid to be delivered.
