Pharmaceutical R&D Department Quiz

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Questions and Answers

What is the main focus of Industrial Pharmacy?

  • Marketing and distribution strategies
  • Process technology and dosage form design (correct)
  • Clinical trials and patient outcomes
  • Raw material extraction and purification

Which department is responsible for overseeing the application of GMPs during manufacturing?

  • Production department
  • R&D department
  • QA department (correct)
  • QC department

What is the role of the Production department in a pharmaceutical firm?

  • Sampling and testing semi-finished and finished products
  • Setting up specifications for raw materials
  • Large scale manufacturing according to the formulation and procedure developed by R&D (correct)
  • Optimization and scale up of formulations

Which department is involved in pre-formulation and analytical method development?

<p>R&amp;D department (D)</p> Signup and view all the answers

What is the main responsibility of the QC department?

<p>Sampling and testing semi-finished and finished products (D)</p> Signup and view all the answers

What does the pharmaceutical industry aim for in terms of formulations and process technologies?

<p>Robust formulations and process technologies to shorten development time and increase product quality (A)</p> Signup and view all the answers

What is the relationship between particle size and surface area?

<p>They are inversely related: smaller the drug particle, greater the surface area. (A)</p> Signup and view all the answers

What can high surface area indicate?

<p>Relatively small particle size (C)</p> Signup and view all the answers

How do small particles with high surface area behave?

<p>They agglomerate more readily (D)</p> Signup and view all the answers

What is the effect of particle size distribution and shapes on drug substances?

<p>They affect various chemical and physical properties (B)</p> Signup and view all the answers

In what state are poorly soluble drugs more readily bioavailable?

<p>Finely subdivided state (A)</p> Signup and view all the answers

How do tablets' size and shape influence drug behavior?

<p>They influence drug behavior (B)</p> Signup and view all the answers

What is the main purpose of preformulation in pharmaceutical development?

<p>Developing stable and bioavailable dosage forms for drug products (A)</p> Signup and view all the answers

What do physicochemical properties of drug candidates primarily affect?

<p>Processing, stability, interaction with excipients, and bioavailability (B)</p> Signup and view all the answers

Why is early characterization of physicochemical properties important in pharmaceutical development?

<p>It reduces development time and costs (D)</p> Signup and view all the answers

What is the critical parameter affecting drug absorption and formulation ease?

<p>Solubility (A)</p> Signup and view all the answers

How is a drug's solubility usually determined?

<p>By the equilibrium solubility method (D)</p> Signup and view all the answers

What solubility range is preferable for oral delivery in a solid form?

<p>Greater than 10 mg/mL (B)</p> Signup and view all the answers

What technique is used to measure water uptake?

<p>Mass change (A)</p> Signup and view all the answers

How does hygroscopicity affect compression characteristics in drug development?

<p>It affects granulation and hardness of the final tablet (D)</p> Signup and view all the answers

What does polymorphism refer to in drug development?

<p>Crystallizing to more than one unit cell with different properties (D)</p> Signup and view all the answers

What technique provides structural data to identify and differentiate polymorphs?

<p>XRPD (B)</p> Signup and view all the answers

What is the stable polymorph in drug development?

<p>The form at a thermodynamic position of equilibrium (B)</p> Signup and view all the answers

How do amorphous materials differ from crystalline materials in drug development?

<p>Amorphous materials have higher solubilities (A)</p> Signup and view all the answers

What is a common strategy to increase drug solubility if the solubility is less than 1 mg mL−1?

<p>Chemical modification into salt or ester forms (A)</p> Signup and view all the answers

What can influence the solubility of a compound?

<p>Molecular size, ionization, ionic strength, temperature, and crystal properties (A)</p> Signup and view all the answers

What is the purpose of using the Henderson–Hasselbalch equations in preformulation characterization?

<p>To calculate the extent of ionization of a drug as a function of pH, if the pKa is known (D)</p> Signup and view all the answers

What is the significance of knowing how a drug will distribute itself between aqueous and fatty environments in preformulation?

<p>It helps in understanding the drug's behavior in different physiological environments (B)</p> Signup and view all the answers

What can hygroscopicity significantly alter in a substance?

<p>Physicochemical properties, such as reducing flowability in wet powders (B)</p> Signup and view all the answers

What does molecular dissociation, particularly understanding acid and base behavior, affect in preformulation characterization?

<p>Solubility (B)</p> Signup and view all the answers

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Study Notes

Pharmaceutical Preformulation Considerations

  • Chemical analysis of drug content in solution is crucial for determining solubility, with methods depending on the drug's chemical nature and type of product.
  • Chemical modification into salt or ester forms is a common strategy to increase drug solubility, especially if the solubility is less than 1 mg mL−1.
  • The solubility of a compound is influenced by various parameters including molecular size, ionization, ionic strength, temperature, and crystal properties.
  • Solubility of every new drug must be determined as a function of pH over the physiological pH.
  • Solubility has several pharmaceutical applications such as obtaining a homogenous distribution of small amounts of drugs, stabilizing unstable drugs, and formulating sustained release dosage forms.
  • Solubilization can enhance absorption and biological activity, improve unpleasant taste of orally administered drugs, and increase drug absorption from ointment bases and suppositories.
  • Molecular dissociation, particularly understanding acid and base behavior, is crucial in preformulation characterization, as it affects solubility.
  • The Henderson–Hasselbalch equations allow calculation of the extent of ionization of a drug as a function of pH, if the pKa is known.
  • Modern automated instrumentation is available to determine pKa values with small amounts of drug, which is useful in preformulation where material is scarce.
  • In preformulation, it is important to know how a drug will distribute itself between aqueous and fatty environments, typically using n-octanol as a simple solvent model.
  • A partition coefficient for the partitioning of a solute between water and n-octanol can be determined experimentally or calculated from the chemical structure of the drug candidate.
  • Hygroscopicity, the tendency of a substance to attract water, can significantly alter physicochemical properties, such as reducing flowability in wet powders.

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