Adverse Effects - Pharmacy Technician Certification Exam Ptce

1. Identify the severe mucocutaneous reaction with skin sloughing and oral lesions that is life-threatening.

   Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN). This severe hypersensitivity reaction involves immune-mediated epidermal necrosis, resulting in widespread skin detachment and mucosal involvement.

2. What boxed-warning adverse effect is most associated with fluoroquinolones in tendons?

   Tendinitis and tendon rupture. Fluoroquinolones impair tendon matrix integrity through mechanisms like collagen degradation, increasing rupture risk especially in Achilles tendons.

3. Which antibiotic is classically associated with photosensitivity and tooth discoloration in children?

   Tetracyclines (for example, doxycycline). Tetracyclines increase skin sensitivity to UV light via phototoxic reactions and bind to developing teeth, causing permanent staining.

4. Identify the life-threatening adverse effect of opioids that requires urgent intervention.

   Respiratory depression. Opioids activate mu receptors in the brainstem, suppressing the respiratory drive and potentially causing hypoventilation or arrest.

5. Identify the severe adverse effect of antipsychotics with fever, rigidity, and autonomic instability.

   Neuroleptic malignant syndrome (NMS). Antipsychotics block dopamine receptors, disrupting thermoregulation and muscle control, leading to hyperthermia and rigidity.

6. What common adverse effect is associated with dihydropyridine calcium channel blockers like amlodipine?

   Peripheral edema. Dihydropyridines cause vasodilation, increasing capillary hydrostatic pressure and fluid extravasation into peripheral tissues like ankles.

7. What is the key counseling allergy risk for sulfonamide antibiotics such as sulfamethoxazole?

   Sulfonamide hypersensitivity (rash to SJS/TEN possible). Sulfonamides can trigger type II to IV hypersensitivity reactions due to their chemical structure, ranging from mild rash to severe skin necrosis.

8. What is the most common adverse effect of opioid analgesics that often needs prophylaxis?

   Constipation. Opioids slow gastrointestinal motility via mu receptor activation, leading to fecal impaction that requires laxatives for prevention.

9. What dangerous adverse effect is associated with statins that presents with muscle pain and dark urine?

   Rhabdomyolysis (severe myopathy). Statins inhibit HMG-CoA reductase, disrupting muscle cell membranes and causing breakdown with myoglobin release that can damage kidneys.

10. Identify the serious adverse effect of beta blockers in susceptible patients with reactive airway disease.

    Bronchospasm (especially nonselective beta blockers). Nonselective beta blockers antagonize beta-2 receptors in bronchi, reducing bronchodilation and exacerbating constriction in asthmatic patients.

11. Identify the serious acetaminophen adverse effect seen with overdose or chronic high use.

    Hepatotoxicity (acute liver failure). Excess acetaminophen depletes glutathione, allowing toxic NAPQI metabolite to accumulate and cause centrilobular hepatic necrosis.

12. Identify the serious adverse effect of metformin that is rare but life-threatening, especially in renal impairment.

    Lactic acidosis. Metformin impairs mitochondrial function in low-oxygen states like renal failure, leading to lactate accumulation and acidosis.

13. Which adverse effect is most characteristic of aminoglycosides such as gentamicin?

    Nephrotoxicity and ototoxicity. Aminoglycosides accumulate in renal tubules and inner ear, causing direct cellular toxicity to kidneys and auditory/vestibular systems.

14. What immediate reaction with hives, wheeze, and hypotension indicates a severe drug allergy?

    Anaphylaxis. This type I hypersensitivity reaction involves IgE-mediated mast cell degranulation, leading to systemic symptoms like hives, wheezing, and hypotension.

15. What adverse effect is characteristic of warfarin that must be monitored for and counseled on?

    Bleeding. Warfarin inhibits vitamin K-dependent clotting factors, prolonging prothrombin time and increasing hemorrhage risk that requires INR monitoring.

16. What dangerous adverse effect is suggested by new facial swelling of lips or tongue after starting an ACE inhibitor?

    Angioedema. ACE inhibitors inhibit bradykinin breakdown, causing fluid leakage into tissues and potentially life-threatening swelling in the face and airways.

17. What serious adverse effect is associated with vancomycin infusion given too rapidly?

    Red man syndrome (infusion-related flushing). Rapid infusion causes histamine release from mast cells, leading to flushing, hypotension, and pruritus that can be prevented by slower administration.

18. Identify the classic severe adverse effect of clindamycin that presents with profuse diarrhea.

    Clostridioides difficile–associated diarrhea/colitis. Clindamycin disrupts gut flora, allowing overgrowth of toxin-producing C. difficile, which causes inflammatory diarrhea and colitis.

19. Which antibiotic class commonly causes rash and anaphylaxis in patients with true penicillin allergy?

    Penicillins (beta-lactams). True allergies to this class involve IgE reactions to the beta-lactam ring, triggering histamine release and anaphylactic symptoms.

20. Which NSAID adverse effect involves stomach lining damage and can cause bleeding?

    Gastrointestinal ulceration/bleeding. NSAIDs inhibit COX-1, reducing protective prostaglandins in the gastric mucosa, which increases acid exposure and erosion risk.

21. What severe NSAID allergy-type reaction presents with bronchospasm in aspirin-sensitive patients?

    Aspirin-exacerbated respiratory disease (bronchospasm). In susceptible individuals, aspirin inhibits COX-1, shunting arachidonic acid to leukotriene pathways that provoke airway constriction.

22. What serious adverse effect is associated with heparin that causes low platelets and thrombosis risk?

    Heparin-induced thrombocytopenia (HIT). Heparin can induce antibodies against platelet factor 4 complexes, triggering platelet activation, consumption, and paradoxical thrombosis.

23. What common adverse effect is characteristic of inhaled corticosteroids if the mouth is not rinsed?

    Oral candidiasis (thrush). Inhaled corticosteroids suppress local immunity in the oropharynx, allowing overgrowth of Candida albicans without post-inhalation rinsing.

24. Which electrolyte abnormality is a serious adverse effect risk with ACE inhibitors and ARBs?

    Hyperkalemia. These agents reduce aldosterone-mediated potassium excretion in the kidneys, leading to elevated serum potassium levels.

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