Introduction: The WHO guidelines for quality control of herbal drugs provide B. Pharm students a practical framework to ensure identity, purity, safety and efficacy of botanical materials. These guidelines cover monographs, standardization, pharmacognostic tests, chemical assays (HPLC, TLC), microbial limits, heavy metal and pesticide screening, good agricultural and collection practices (GACP) and good manufacturing practices (GMP). Emphasis on documentation, reference standards, stability testing and method validation prepares students for regulatory compliance and quality assurance. Understanding WHO recommendations strengthens skills in pharmacognosy, analytical techniques, adulteration detection and risk assessment for herbal products. Now let’s test your knowledge with 30 MCQs on this topic.
Q1. What is the primary objective of WHO guidelines for quality control of herbal drugs?
- To increase herbal drug market share
- To ensure identity, purity, safety and efficacy of herbal materials
- To promote traditional use without testing
- To standardize pricing of herbal medicines
Correct Answer: To ensure identity, purity, safety and efficacy of herbal materials
Q2. Which of the following is a key component of a herbal drug monograph recommended by WHO?
- Pharmacoeconomic analysis
- Botanical identification and macroscopic/microscopic features
- Marketing strategies
- International trade tariffs
Correct Answer: Botanical identification and macroscopic/microscopic features
Q3. Which analytical technique is commonly recommended for chemical fingerprinting of herbal drugs?
- Gel electrophoresis
- HPLC (High Performance Liquid Chromatography)
- Polarimetry
- Bomb calorimetry
Correct Answer: HPLC (High Performance Liquid Chromatography)
Q4. WHO guidelines emphasize GACP for raw herbal materials. What does GACP stand for?
- Good Agricultural and Collection Practices
- Global Accountable Collection Procedures
- General Analytical Control Plans
- Good Approval for Clinical Procedures
Correct Answer: Good Agricultural and Collection Practices
Q5. Which test is essential to confirm botanical identity of powdered herbal drug material?
- Microscopic examination for diagnostic features
- Viscosity measurement
- Particle size distribution only
- Organoleptic taste test exclusively
Correct Answer: Microscopic examination for diagnostic features
Q6. Which contaminant is specifically monitored because of chronic toxicity risks in herbal drugs?
- Sugar content
- Heavy metals (e.g., lead, mercury, cadmium)
- Cellulose content
- Protein concentration
Correct Answer: Heavy metals (e.g., lead, mercury, cadmium)
Q7. Microbial limit tests in WHO guidelines are intended to assess what?
- Chemical potency
- Microbial contamination and safety of herbal products
- Color consistency
- Packaging integrity only
Correct Answer: Microbial contamination and safety of herbal products
Q8. What is the role of a voucher specimen in herbal quality control?
- Acts as a financial receipt for raw material
- Serves as a permanent reference for botanical identity
- Provides a marketing sample
- Replaces chemical assays
Correct Answer: Serves as a permanent reference for botanical identity
Q9. Which practice is part of good manufacturing practices (GMP) for herbal drug production?
- Documented Standard Operating Procedures (SOPs)
- Ad hoc blending without records
- Unverified suppliers only
- Ignoring cleaning validation
Correct Answer: Documented Standard Operating Procedures (SOPs)
Q10. Which of the following is a recommended method for detecting adulteration in herbal drugs?
- Thin Layer Chromatography (TLC) fingerprinting
- Counting tablets only
- Measuring package weight without content analysis
- Assessing label color
Correct Answer: Thin Layer Chromatography (TLC) fingerprinting
Q11. Stability testing of herbal preparations aims to determine:
- Shelf life and appropriate storage conditions
- Only microbial load at manufacture
- Market demand
- Tax classification
Correct Answer: Shelf life and appropriate storage conditions
Q12. What is a common chemical criteria used in standardization of herbal drugs?
- Assay of one or more marker compounds
- Only color matching
- Price comparison
- Ambient humidity measurement
Correct Answer: Assay of one or more marker compounds
Q13. Which international document often complements WHO guidelines for herbal quality control?
- International Pharmacopoeias and regional pharmacopoeias
- Patent law manuals
- Tourism brochures
- Food recipes
Correct Answer: International Pharmacopoeias and regional pharmacopoeias
Q14. In WHO guidance, why is documentation and traceability important for herbal drugs?
- To enable recall, audit and confirm source and processing steps
- To reduce production costs only
- To replace analytical testing
- To increase packaging speed
Correct Answer: To enable recall, audit and confirm source and processing steps
Q15. Which residue is specifically monitored in herbal drugs due to agricultural use?
- Pesticide residues
- Soluble fiber
- Vitamin C
- Natural sugars
Correct Answer: Pesticide residues
Q16. What is the significance of reference standards in herbal drug analysis?
- They provide a known comparator for identity and assay measurements
- They replace raw materials
- They are marketing slogans
- They are not needed if TLC is used
Correct Answer: They provide a known comparator for identity and assay measurements
Q17. WHO recommends testing for aflatoxins in herbal drugs because:
- Aflatoxins are beneficial nutrients
- Aflatoxins are toxic fungal metabolites that pose health risks
- Aflatoxins improve color
- Aflatoxins increase shelf life
Correct Answer: Aflatoxins are toxic fungal metabolites that pose health risks
Q18. Which parameter differentiates herbal drug raw material from finished herbal medicinal product?
- Processing, dosage form, and finished-product specifications
- Color of storage room
- Supplier’s logo
- Country of origin name only
Correct Answer: Processing, dosage form, and finished-product specifications
Q19. Which of the following is NOT typically a part of WHO recommended quality control tests for herbal drugs?
- Identity and purity tests
- Microbial limits and contaminants screening
- Clinical efficacy trials for every batch
- Chemical assays and fingerprinting
Correct Answer: Clinical efficacy trials for every batch
Q20. The term “standardization” in herbal drug quality control mostly refers to:
- Ensuring consistent levels of defined marker compounds and quality attributes
- Setting uniform retail prices
- Standard packaging size only
- Removing all natural variability
Correct Answer: Ensuring consistent levels of defined marker compounds and quality attributes
Q21. Method validation in the context of herbal drug assays ensures:
- That analytical methods are reliable, accurate, precise and specific
- That packaging is attractive
- That raw material suppliers are certified
- That labels are printed correctly
Correct Answer: That analytical methods are reliable, accurate, precise and specific
Q22. Which practice helps prevent cross-contamination in herbal production facilities?
- Dedicated equipment, validated cleaning procedures and proper workflow
- Storing all herbs in one container
- Mixing batches without cleaning
- Using the same sieve for all materials without validation
Correct Answer: Dedicated equipment, validated cleaning procedures and proper workflow
Q23. Why is botanical nomenclature important in WHO quality guidance?
- To avoid confusion and ensure correct species identification and sourcing
- To create new brand names
- To allow substitution without oversight
- To promote local slang names
Correct Answer: To avoid confusion and ensure correct species identification and sourcing
Q24. Which of the following analytical approaches provides both visual and chemical profiling for herbal drugs?
- Thin Layer Chromatography (TLC) combined with reference markers
- Weighing the package
- Counting leaves by hand only
- Measuring pH only
Correct Answer: Thin Layer Chromatography (TLC) combined with reference markers
Q25. Adverse event reporting for herbal products is important because:
- It ensures ongoing safety monitoring and regulatory action if needed
- It increases sales
- It replaces quality control testing
- It is optional and unhelpful
Correct Answer: It ensures ongoing safety monitoring and regulatory action if needed
Q26. Which documentation is essential for traceability of raw herbal material?
- Supplier certificates, collection records, batch records and voucher specimen details
- Only product photos
- Only verbal supplier assurances
- Only retail invoices
Correct Answer: Supplier certificates, collection records, batch records and voucher specimen details
Q27. Which parameter is commonly used as a purity test for crude herbal drugs?
- Foreign matter and ash values
- Customer reviews
- Company profit margins
- Packaging color patterns
Correct Answer: Foreign matter and ash values
Q28. What is the role of Good Distribution Practices (GDP) for herbal drugs?
- To maintain product quality during storage and transportation until reaching end user
- To design marketing campaigns
- To determine product price only
- To regulate office dress code
Correct Answer: To maintain product quality during storage and transportation until reaching end user
Q29. Which of the following best describes chemical fingerprinting of herbal drugs?
- Comprehensive profiling of multiple constituents to establish characteristic pattern
- Counting number of manufacturers
- Measuring package dimensions
- Assessing only odor
Correct Answer: Comprehensive profiling of multiple constituents to establish characteristic pattern
Q30. For regulatory submission of an herbal drug dossier, WHO guidance typically expects inclusion of:
- Quality documentation including source, specifications, analytical methods, stability and safety data
- Only marketing photos
- Only retail pricing
- Only social media feedback
Correct Answer: Quality documentation including source, specifications, analytical methods, stability and safety data
