Mixed Deck — All DHA PHARMACIST Topics Flashcards

What is the UAE's stance on dispensing prescription medications without a valid prescription (over-the-counter sale of prescription drugs)?

Answer: It is illegal and subject to regulatory action and fines against the pharmacy and pharmacist

UAE regulations strictly prohibit dispensing prescription medicines without a valid prescription; pharmacists and pharmacy facilities face fines and license suspension for violations.

Which factor most significantly affects the volume of distribution (Vd) of a highly lipophilic drug?

Answer: Extensive distribution into adipose and peripheral tissues resulting in a large Vd

Highly lipophilic drugs partition extensively into fatty tissues and peripheral compartments, resulting in a large volume of distribution far exceeding actual body water volume.

What is the maximum legal supply for a prescription-only medicine dispensed in a UAE pharmacy without a repeat prescription?

Answer: A one-month supply unless specified otherwise by the prescriber for chronic conditions

UAE dispensing standards generally limit prescription-only medicine supply to one month per dispensing event unless the prescriber specifies otherwise for chronic disease management.

What is the Henderson-Hasselbalch equation used for in pharmacy?

Answer: Calculating the degree of ionisation of a drug at a given pH

The Henderson-Hasselbalch equation relates pH, pKa, and the ratio of ionised to un-ionised drug, predicting drug absorption and distribution across biological membranes.

Which of the following best describes the Emax model in pharmacodynamics?

Answer: Drug effect follows a sigmoidal curve and reaches a maximum ceiling effect

The Emax model describes a sigmoidal concentration-effect relationship where effect increases with concentration but plateaus at Emax when all receptors are occupied.

What is the DHA requirement for pharmacist verification of controlled substance prescriptions?

Answer: Verify prescriber authority, check patient ID, confirm dose within limits, check for potential abuse patterns, and maintain detailed registers

Controlled substance prescriptions require enhanced verification: confirming prescriber authorization to prescribe the specific schedule, patient identification verification, dose limit checking, abuse pattern monitoring, and detailed register documentation.

What classification system does the DHA use for controlled medications in Dubai?

Answer: Schedule-based classification (narcotic, psychotropic, controlled, semi-controlled) aligned with UAE federal schedules

DHA classifies controlled medications into schedules including narcotic drugs, psychotropic substances, controlled medications, and semi-controlled medications, aligned with UAE federal law and international conventions.

A patient taking simvastatin is prescribed clarithromycin for a respiratory infection. What is the primary concern?

Answer: Clarithromycin inhibits CYP3A4, dramatically increasing simvastatin levels and the risk of myopathy/rhabdomyolysis

Clarithromycin is a potent CYP3A4 inhibitor; co-administration with simvastatin (a CYP3A4 substrate) raises statin plasma levels, greatly increasing the risk of myopathy and rhabdomyolysis.

What is the pharmacist's role in DHA hospital emergency departments?

Answer: Provide immediate drug information, prepare emergency medications, verify doses for high-risk medications, and participate in resuscitation teams

DHA emergency department pharmacists provide real-time drug information, prepare and verify emergency medications, participate in resuscitation teams, manage antidote availability, and ensure safe medication use in acute settings.

In the preparation of total parenteral nutrition (TPN), which electrolyte must be added last and slowly to avoid precipitation?

Answer: Phosphate (must be added before calcium to avoid calcium phosphate precipitation)

Calcium and phosphate in TPN can precipitate as calcium phosphate; phosphate must be added and diluted well before calcium is introduced to prevent this dangerous and potentially fatal precipitate.

What is the significance of the 'critical quality attribute' (CQA) concept in pharmaceutical manufacturing?

Answer: A CQA is a physical, chemical, biological, or microbiological property that must be within an appropriate limit to ensure desired product quality

CQAs are properties directly impacting drug safety, efficacy, and quality; they are identified during development and controlled throughout manufacturing to ensure consistent product performance.

What is the DHA policy on medication substitution by pharmacists?

Answer: Generic substitution is permitted unless the prescriber specifies 'no substitution,' with patient consent required

DHA allows pharmacists to substitute prescribed medications with bioequivalent generics unless the prescriber explicitly indicates no substitution, provided the patient is informed and consents to the change.

How long must controlled substance registers (narcotic drug records) be retained in UAE pharmacies?

Answer: A minimum of 5 years

UAE MOHAP regulations require pharmacies to retain narcotic and controlled drug records for a minimum of five years to allow regulatory inspection and audit trail verification.

Which DHA document authorises a pharmacist to practice at a specific facility before the full license is issued?

Answer: Letter of Good Standing / Interim Approval

DHA may issue an interim approval or letter of good standing allowing conditional practice at a specified facility while the full license application is being processed.

What inventory management requirements does DHA impose on pharmacies?

Answer: Regular inventory counts, expiry date monitoring, first-expiry-first-out dispensing, controlled substance inventory reconciliation, and shortage reporting

DHA requires systematic inventory management including regular physical counts, expiry date tracking with FEFO dispensing, controlled substance reconciliation, near-expiry product management, and reporting of critical drug shortages.

What is the standard validity period for a DHA pharmacist license before renewal is due?

Answer: 2 years

DHA pharmacist licenses are valid for two years, after which renewal with evidence of continuing professional development is required.

When should a patient taking a bisphosphonate (e.g., alendronate) for osteoporosis take the medication?

Answer: Once weekly on an empty stomach with a full glass of water, remaining upright for 30 minutes afterward

Oral bisphosphonates require fasting administration with plain water and maintaining an upright posture for at least 30 minutes to maximise absorption and prevent oesophageal irritation or ulceration.

Which ISO cleanroom classification is required for the preparation of sterile injectable medications?

Answer: ISO 5 (Class 100) for the critical zone within a laminar airflow workbench

Sterile product compounding requires the critical working zone to be ISO 5 (Class 100), ensuring ≤100 particles ≥0.5 µm per cubic foot to prevent microbial and particulate contamination.

A patient with renal impairment (GFR 20 mL/min) is prescribed gentamicin. Why is dose adjustment needed?

Answer: Gentamicin is renally excreted; reduced GFR causes drug accumulation leading to nephrotoxicity and ototoxicity

Gentamicin is almost entirely eliminated by glomerular filtration; reduced GFR leads to drug accumulation, increasing plasma levels and the risk of nephrotoxicity and irreversible ototoxicity.

What does the endotoxin (pyrogen) test in sterile preparation quality control detect?

Answer: Bacterial endotoxins (lipopolysaccharides from Gram-negative bacteria) that can cause fever and septic reactions

Endotoxin (pyrogen) testing using the Limulus Amebocyte Lysate (LAL) assay detects Gram-negative bacterial endotoxins that survive sterilisation and can cause severe febrile reactions when injected.