Pharmacology Practice Questions
Pharmacology questions on dental board exams are rarely about memorising doses in isolation. They ask how a drug interacts with a patient's condition or with other medicines. This set covers general pharmacology principles, analgesics and anti-inflammatories, drug considerations by medical condition, drugs of abuse and their dental relevance, fluoride pharmacology and the pharmacological management of xerostomia. It is relevant to the AFK, INBDE, ORE and ADC, and to dental students taking pharmacology courses. Expect questions that ask which analgesic is safest, which interaction matters, or what a medication history implies for treatment.
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Questions
Question 1 of 10
Drugs of Abuse: Dental Relevance
Which combination strongly contributes to the severe caries pattern associated with methamphetamine use?
The answer is A.
Methamphetamine can markedly reduce salivary flow, promote bruxism, and accompany frequent intake of sugary acidic drinks and poor oral hygiene. Loss of salivary buffering and repeated carbohydrate exposure create a highly cariogenic environment. The pattern is multifactorial rather than a direct drug effect alone.
Question 2 of 10
Drug Considerations by Medical Condition
A renally eliminated dental drug accumulates when kidney function declines. Which dosing response is pharmacokinetically appropriate?
The answer is D.
When renal clearance falls, repeated standard doses can accumulate and increase toxicity. Depending on the drug, exposure can be reduced by lowering each dose, extending the dosing interval, or both. Estimated kidney function, therapeutic window, and current prescribing information guide the specific adjustment.
Question 3 of 10
Fluoride Pharmacology
Why may a calcium-containing liquid be advised after a small, nonsevere fluoride ingestion under toxicology guidance?
The answer is C.
Calcium can bind fluoride in the gastrointestinal tract and reduce absorption. This is only one part of dose-based management and does not replace expert assessment when the amount is uncertain, symptoms are present, or the exposure is substantial. Serious toxicity requires urgent medical monitoring.
Question 4 of 10
General Pharmacology Principles
What is the usual pharmacokinetic consequence of phase II glucuronidation?
The answer is B.
Glucuronidation conjugates a drug or metabolite with a polar group. The resulting product is generally more water soluble and therefore more readily eliminated in urine or bile. Phase II reactions do not necessarily inactivate every drug, but enhanced excretion is their usual pharmacokinetic consequence.
Question 5 of 10
Pharmacologic Management of Xerostomia
Which measure is most important alongside symptom treatment for medication-induced xerostomia?
The answer is D.
Reduced salivary flow weakens buffering, clearance, and remineralization, sharply increasing caries risk. High-quality plaque control, appropriate topical fluoride, noncariogenic saliva stimulation or substitutes, and dietary counseling address this consequence. Symptom relief alone does not protect teeth.
Question 6 of 10
Analgesics & Anti-inflammatories
Why can appropriately dosed ibuprofen plus acetaminophen provide stronger post-operative analgesia than either drug alone?
The answer is A.
Ibuprofen reduces peripheral prostaglandin production, whereas acetaminophen acts mainly through central analgesic pathways. Combining complementary mechanisms can improve pain relief without relying on an opioid. Each component still retains its own dose ceiling, contraindications, and toxicity risks.
Question 7 of 10
Pharmacologic Management of Xerostomia
Which coexisting condition creates a mechanistically similar concern when prescribing a systemic muscarinic sialogogue?
The answer is B.
Muscarinic stimulation can narrow airways and increase secretions, making poorly controlled obstructive airway disease relevant to systemic sialogogue safety. Other cholinergic effects also require review of cardiovascular and ocular history. The listed dental and refractive findings do not share this receptor-mediated respiratory hazard.
Question 8 of 10
Pharmacologic Management of Xerostomia
Why can a sugar-containing salivary stimulant worsen disease even if it temporarily relieves xerostomia?
The answer is D.
A sweet may briefly increase flow, but repeated fermentable carbohydrate exposure supplies plaque bacteria and lowers pH. In a poorly buffered mouth, the added cariogenic challenge can exceed the benefit of transient clearance. Sugar-free stimulation, fluoride, diet control, and plaque removal better address both comfort and disease.
Question 9 of 10
Drugs of Abuse: Dental Relevance
A malnourished patient who drinks heavily has unintentionally combined several acetaminophen-containing products. Which mechanism most increases hepatotoxic risk?
The answer is B.
Multiple products can produce an excessive cumulative acetaminophen dose. Malnutrition and chronic heavy alcohol exposure may reduce glutathione reserves or increase formation of NAPQI, allowing this reactive metabolite to bind hepatic proteins. Product reconciliation is critical because toxicity can occur without one obviously massive dose.
Question 10 of 10
Pharmacologic Management of Xerostomia
A patient uses several essential xerogenic medicines and has no contraindication to pilocarpine. Which outcome would justify continuing it after a monitored trial?
The answer is B.
A therapeutic trial is justified only when measurable or meaningful benefit outweighs adverse effects. Essential xerogenic medicines may remain, but pilocarpine should not be continued solely because it was prescribed. Lack of viable gland response or serious cholinergic toxicity shifts management toward local measures and prevention.
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