Question

What is the exact temperature maintained for dissolution testing according to the Indian Pharmacopoeia?

• A. \(35 \pm 0.5^\circ C\)
• B. \(36.5 \pm 0.5^\circ C\)
• C. \(37 \pm 0.5^\circ C\)
• D. \(38 \pm 0.5^\circ C\)

Hint:

Key parameters for dissolution testing (Indian Pharmacopoeia):

• \textbf{Temperature:} \(37 \pm 0.5^\circ C\)
• \textbf{Purpose:} To measure the rate of drug release from dosage forms
• \textbf{Simulates:} Human gastrointestinal conditions

Remember: \textbf{Dissolution temperature = Body temperature}.

Answer 1

The Correct Option is C

Concept: Dissolution testing is an important quality control test used in pharmaceutical analysis to determine the rate and extent at which a drug substance dissolves from a dosage form, such as tablets or capsules, into a dissolution medium. According to the Indian Pharmacopoeia (IP), dissolution testing is performed under carefully controlled laboratory conditions to simulate the environment of the human gastrointestinal tract. One of the critical parameters in this test is the temperature of the dissolution medium. The standard temperature maintained during dissolution testing is: \[ 37 \pm 0.5^\circ C \] This temperature is chosen because it closely resembles the normal human body temperature, ensuring that the test conditions mimic the physiological environment in which the drug will dissolve after administration.
Step 1: Understanding the purpose of dissolution testing.
Dissolution testing helps in:

• Evaluating the drug release rate from solid dosage forms.
• Ensuring batch-to-batch consistency.
• Predicting the bioavailability of the drug.
• Maintaining quality control during pharmaceutical manufacturing.

Step 2: Importance of temperature control.
Temperature is a crucial factor affecting drug dissolution because it influences:

• Solubility of the drug
• Diffusion rate of drug molecules
• Stability of the dissolution medium

Therefore, the temperature must be precisely controlled at: \[ 37 \pm 0.5^\circ C \] This ensures that the test conditions simulate the temperature inside the human gastrointestinal tract.
Step 3: Evaluating the options.

• \(35 \pm 0.5^\circ C\) – Lower than physiological temperature.
• \(36.5 \pm 0.5^\circ C\) – Close but not the pharmacopoeial standard.
• \(37 \pm 0.5^\circ C\) – Correct temperature according to the Indian Pharmacopoeia.
• \(38 \pm 0.5^\circ C\) – Higher than the specified standard.

Thus, the correct answer is: \[ 37 \pm 0.5^\circ C \]