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Pharmacology Principles and Therapeutic Interventions
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Pharmacology Principles and Therapeutic Interventions
Pharmacology Principles and Therapeutic Interventions
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1
Question
What is the primary mechanism of action for first-generation antihistamines?
Page 1
Answer
They block H1 receptors in both the central nervous system and the periphery.
2
Question
Why are first-generation antihistamines often associated with sedation and drowsiness?
Page 1
Answer
These medications are able to cross the blood-brain barrier and penetrate the central nervous system.
3
Question
Which specific adverse effects result from the blockade of muscarinic receptors by first-generation antihistamines?
Page 1
Answer
Anticholinergic effects such as dry mouth, urinary retention, and constipation occur.
4
Question
Why does the Beers criteria recommend avoiding first-generation antihistamines in the elderly population?
Page 1
Answer
They increase the risks of confusion, delirium, and falls due to central nervous system penetration.
5
Question
Name three examples of second-generation antihistamine medications.
Page 1
Answer
Loratadine, Cetirizine, and Fexofenadine are common second-generation antihistamines.
6
Question
What is the clinical advantage of second-generation antihistamines over first-generation agents?
Page 1
Answer
They exhibit selective peripheral H1 blockade and cause minimal sedation.
7
Question
Which allergic condition is ideally treated with second-generation antihistamines as first-line therapy?
Page 1
Answer
Allergic rhinitis is the primary indication for first-line treatment with these agents.
8
Question
What paradoxical reaction can occur in children when taking antihistamines?
Page 2
Answer
Children may experience paradoxical excitation rather than sedation.
9
Question
Which common upper respiratory symptom is NOT effectively treated by antihistamines?
Page 2
Answer
Antihistamines do not treat nasal congestion.
10
Question
What is the primary mechanism of action for nonendocrine glucocorticoids?
Page 2
Answer
They inhibit phospholipase A2, leading to decreased levels of arachidonic acid, prostaglandins, and leukotrienes.
11
Question
List four systemic adverse effects associated with the use of glucocorticoids.
Page 2
Answer
Hyperglycemia, increased infection risk, osteoporosis, and adrenal suppression are major side effects.
12
Question
Why is it critical for patients to avoid stopping glucocorticoids abruptly?
Page 3
Answer
Abrupt cessation can lead to an adrenal crisis due to the suppression of the adrenal glands.
13
Question
How does the half-life of a corticosteroid relate to the risk of adrenal suppression?
Page 3
Answer
A longer half-life is associated with a greater risk of adrenal suppression.
14
Question
What is the mechanism of action for the influenza medication Oseltamivir?
Page 3
Answer
It is a neuraminidase inhibitor that blocks the release of the virus from infected cells.
15
Question
Within what timeframe must Oseltamivir be initiated for it to be effective?
Page 3
Answer
It must be started within 48 hours of the onset of symptoms.
16
Question
What is the primary mechanism of action for intranasal Cromolyn sodium?
Page 3
Answer
It stabilizes mast cells, thereby preventing the release of histamine.
17
Question
Why should Cromolyn sodium be administered before exposure to an allergen?
Page 3
Answer
It is used for prevention and is not effective for treating acute allergic symptoms.
18
Question
How do sympathomimetic decongestants achieve their effect in the nasal passages?
Page 3
Answer
They stimulate alpha-1 receptors to cause vasoconstriction, which reduces mucosal edema and congestion.
19
Question
What is the maximum recommended duration for using topical decongestant sprays like phenylephrine?
Page 4
Answer
They should be used for no more than 3 to 5 days.
20
Question
Which drug class is considered first-line therapy for allergic rhinitis due to its ability to reduce inflammation at all levels?
Page 4
Answer
Intranasal corticosteroids, such as Fluticasone or Budesonide, are the first-line choice.
21
Question
What are the common side effects of prostaglandin analogs used in the eye?
Page 4
Answer
Side effects include permanent darkening of the iris, enhanced eyelash growth, and hyperemia.
22
Question
What is the mechanism of action and primary indication for ophthalmic Cyclosporine?
Page 5
Answer
It inhibits T-cell inflammation and is used for the treatment of chronic dry eye.
23
Question
What are the primary contraindications for the use of Ustekinumab?
Page 5
Answer
It should be avoided in patients who are immunocompromised or have active infections.
24
Question
What education should be provided to a patient starting topical Tacrolimus?
Page 5
Answer
Patients should be told that initial burning is normal and they must avoid sunlight.
25
Question
Which topical medication is considered first-line treatment for impetigo?
Page 5
Answer
Mupirocin is the first-line topical antibiotic for treating impetigo.
26
Question
What is the first-line pharmacological treatment for common warts?
Page 6
Answer
Salicylic acid is the first-line treatment for warts.
27
Question
Describe the stepwise treatment approach for acne based on severity.
Page 6
Answer
Mild acne is treated with retinoids, moderate with combination therapy, and severe with isotretinoin.
28
Question
What are the common adverse effects and necessary monitoring for a patient on Isotretinoin?
Page 6
Answer
Side effects include severe dryness, elevated LFTs, and increased triglycerides; pregnancy testing and labs are required.
29
Question
Which antibiotic is the first-line treatment for acute otitis media (AOM)?
Page 6
Answer
Amoxicillin is the standard first-line antibiotic for acute otitis media.
30
Question
What medications are indicated for persistent or resistant acute otitis media (AOM)?
Page 7
Answer
Amoxicillin-clavulanate or Ceftriaxone are used when first-line therapy fails.