Prepare for B.Pharm, D.Pharm, GPAT, and pharmacist recruitment examinations with these 30 important Antidepressant Drugs MCQs. This practice set covers selective serotonin reuptake inhibitors (SSRIs), serotonin-norepinephrine reuptake inhibitors (SNRIs), tricyclic antidepressants (TCAs), monoamine oxidase inhibitors (MAOIs), mechanisms of action, therapeutic uses, and adverse effects.
Each question includes four options, the correct answer, and a brief explanation to help you revise important pharmacology concepts.
Section 1: Classification of Antidepressant Drugs
1. Which of the following is a selective serotonin reuptake inhibitor (SSRI)?
A. Amitriptyline
B. Fluoxetine
C. Phenelzine
D. Imipramine
Correct Answer: B. Fluoxetine
Explanation: Fluoxetine is an SSRI that inhibits serotonin reuptake. Other examples include sertraline, escitalopram, paroxetine, and citalopram.
2. Which of the following belongs to the serotonin-norepinephrine reuptake inhibitor (SNRI) class?
A. Venlafaxine
B. Fluoxetine
C. Phenelzine
D. Clomipramine
Correct Answer: A. Venlafaxine
Explanation: Venlafaxine inhibits the reuptake of serotonin and norepinephrine. Duloxetine and desvenlafaxine are other examples of SNRIs.
3. Which of the following is a tricyclic antidepressant (TCA)?
A. Sertraline
B. Escitalopram
C. Amitriptyline
D. Venlafaxine
Correct Answer: C. Amitriptyline
Explanation: Amitriptyline is a TCA that inhibits the reuptake of serotonin and norepinephrine. It also blocks several other receptors, contributing to its adverse effects.
4. Which of the following is a monoamine oxidase inhibitor (MAOI)?
A. Phenelzine
B. Fluoxetine
C. Duloxetine
D. Bupropion
Correct Answer: A. Phenelzine
Explanation: Phenelzine is an MAOI that inhibits monoamine oxidase enzymes, reducing the breakdown of certain neurotransmitters.
5. Which antidepressant primarily inhibits the reuptake of norepinephrine and dopamine?
A. Bupropion
B. Sertraline
C. Escitalopram
D. Fluvoxamine
Correct Answer: A. Bupropion
Explanation: Bupropion acts mainly by inhibiting norepinephrine and dopamine reuptake. It is used for depression and, in some formulations and settings, smoking cessation.
Section 2: Mechanism of Action
6. What is the primary mechanism of action of SSRIs?
A. Inhibition of serotonin reuptake
B. Inhibition of dopamine receptors
C. Blockade of GABA-A receptors
D. Inhibition of acetylcholinesterase
Correct Answer: A. Inhibition of serotonin reuptake
Explanation: SSRIs block the serotonin transporter (SERT), increasing serotonin availability in the synaptic space.
7. Which enzyme is inhibited by MAOIs?
A. Acetylcholinesterase
B. Monoamine oxidase
C. Cyclooxygenase
D. Carbonic anhydrase
Correct Answer: B. Monoamine oxidase
Explanation: Monoamine oxidase normally breaks down monoamine neurotransmitters. Inhibiting this enzyme increases the availability of certain neurotransmitters.
8. Which neurotransmitters are principally affected by SNRIs?
A. Serotonin and norepinephrine
B. GABA and glycine
C. Acetylcholine and histamine
D. Glutamate and glycine only
Correct Answer: A. Serotonin and norepinephrine
Explanation: SNRIs inhibit the reuptake of both serotonin and norepinephrine, enhancing their neurotransmission.
9. Which antidepressant is classified as a serotonin antagonist and reuptake inhibitor (SARI)?
A. Trazodone
B. Fluoxetine
C. Phenelzine
D. Bupropion
Correct Answer: A. Trazodone
Explanation: Trazodone inhibits serotonin reuptake and antagonises certain serotonin receptors. Its effects also include sedation.
10. What is an important mechanism of action of mirtazapine?
A. Antagonism of presynaptic alpha-2 adrenergic receptors
B. Inhibition of acetylcholinesterase
C. Direct activation of dopamine D2 receptors
D. Blockade of voltage-gated sodium channels as its primary antidepressant action
Correct Answer: A. Antagonism of presynaptic alpha-2 adrenergic receptors
Explanation: Mirtazapine blocks alpha-2 adrenergic receptors and certain serotonin receptors, enhancing noradrenergic and serotonergic neurotransmission.
Section 3: Important Antidepressant Drugs
11. Which of the following is an SSRI commonly used to treat depression and certain anxiety disorders?
A. Sertraline
B. Phenelzine
C. Amitriptyline
D. Imipramine
Correct Answer: A. Sertraline
Explanation: Sertraline is an SSRI used for depression and several other approved indications, including certain anxiety-related disorders.
12. Which antidepressant is also used for certain neuropathic pain conditions?
A. Duloxetine
B. Fluvoxamine
C. Phenelzine
D. Flumazenil
Correct Answer: A. Duloxetine
Explanation: Duloxetine is an SNRI used for depression and certain chronic pain conditions, including some forms of neuropathic pain.
13. Which tricyclic antidepressant is particularly associated with anticholinergic adverse effects?
A. Amitriptyline
B. Escitalopram
C. Sertraline
D. Venlafaxine
Correct Answer: A. Amitriptyline
Explanation: Amitriptyline blocks muscarinic receptors, which can cause dry mouth, constipation, blurred vision, and urinary retention.
14. Which of the following antidepressants is commonly associated with increased appetite and weight gain?
A. Mirtazapine
B. Fluoxetine in every patient
C. Phenelzine in every patient
D. Escitalopram in every patient
Correct Answer: A. Mirtazapine
Explanation: Mirtazapine commonly causes increased appetite and weight gain. The extent of these effects varies between individuals.
15. Which antidepressant is also used in some treatment plans for smoking cessation?
A. Bupropion
B. Amitriptyline
C. Clomipramine
D. Fluvoxamine
Correct Answer: A. Bupropion
Explanation: Bupropion is used for depression and is available in specific formulations for smoking cessation. It is not appropriate for everyone because it can increase seizure risk.
Section 4: Therapeutic Uses
16. Which of the following is a recognised use of clomipramine?
A. Obsessive-compulsive disorder
B. Bacterial pneumonia
C. Type 1 diabetes mellitus
D. Acute opioid overdose
Correct Answer: A. Obsessive-compulsive disorder
Explanation: Clomipramine is a TCA with an established role in treating OCD. SSRIs are also commonly used for this condition.
17. Which class of antidepressants is commonly used as a first-line pharmacological option for depression?
A. SSRIs
B. Barbiturates
C. Opioid analgesics
D. General anaesthetics
Correct Answer: A. SSRIs
Explanation: SSRIs are commonly used because of their efficacy and generally more favourable safety profile than older antidepressants such as TCAs and MAOIs. The best treatment depends on the individual patient.
18. Which antidepressant class may be used in selected patients with depression and certain chronic pain conditions?
A. SNRIs
B. Antacids
C. Antihistamines only
D. Antimalarials
Correct Answer: A. SNRIs
Explanation: Some SNRIs, particularly duloxetine, are used for selected chronic pain conditions as well as depression.
19. Which antidepressant class is associated with clinically important food and drug interactions involving tyramine and other substances?
A. MAOIs
B. SSRIs only
C. SNRIs only
D. All antidepressants to the same extent
Correct Answer: A. MAOIs
Explanation: Certain MAOIs can interact with tyramine-rich foods and various medicines, potentially causing dangerous reactions. Precautions depend on the specific drug.
20. Which statement about the onset of antidepressant effects is correct?
A. All antidepressants work fully within minutes
B. Meaningful improvement often takes several weeks
C. Antidepressants have no delayed effects
D. Every patient responds within exactly 24 hours
Correct Answer: B. Meaningful improvement often takes several weeks
Explanation: Some symptoms may improve earlier, but the full therapeutic response often takes several weeks. The time to benefit varies by medicine and patient.
Section 5: Adverse Effects and Safety
21. Which adverse effect is commonly associated with SSRIs?
A. Sexual dysfunction
B. Permanent hearing loss in every patient
C. Severe hypoglycaemia in every patient
D. Complete suppression of breathing at normal doses
Correct Answer: A. Sexual dysfunction
Explanation: Sexual dysfunction is a recognised adverse effect of SSRIs. Other possible effects include nausea, headache, sleep disturbances, and increased sweating.
22. Which adverse effects are commonly associated with TCAs?
A. Dry mouth and constipation
B. Increased salivation in every patient
C. Complete absence of sedation
D. Guaranteed weight loss
Correct Answer: A. Dry mouth and constipation
Explanation: TCAs can block muscarinic receptors, producing anticholinergic effects such as dry mouth, constipation, blurred vision, and urinary retention.
23. Which serious condition can occur when excessive serotonergic activity develops?
A. Serotonin syndrome
B. Scurvy
C. Rickets
D. Iron-deficiency anaemia
Correct Answer: A. Serotonin syndrome
Explanation: Serotonin syndrome can cause agitation, sweating, fever, tremor, abnormal reflexes, and muscle rigidity. Severe symptoms require urgent medical assessment.
24. Why is TCA overdose particularly dangerous?
A. It can cause serious cardiac toxicity and seizures
B. It always causes only mild nausea
C. It has no effect on the cardiovascular system
D. It cannot affect consciousness
Correct Answer: A. It can cause serious cardiac toxicity and seizures
Explanation: TCA overdose can produce dangerous cardiac conduction abnormalities, arrhythmias, seizures, and reduced consciousness. Suspected overdose requires emergency medical care.
25. What is an important precaution when stopping an antidepressant after regular use?
A. Stop suddenly in every case
B. Consult the prescriber about an appropriate discontinuation plan
C. Double the dose before stopping
D. Replace it with alcohol
Correct Answer: B. Consult the prescriber about an appropriate discontinuation plan
Explanation: Abrupt discontinuation of certain antidepressants can cause symptoms such as dizziness, nausea, sleep disturbances, and flu-like feelings. Some patients need a gradual dose reduction.
Section 6: Advanced Pharmacology MCQs
26. Which antidepressant is associated with inhibition of serotonin reuptake and antagonism of certain serotonin receptors?
A. Trazodone
B. Phenelzine
C. Bupropion
D. Imipramine
Correct Answer: A. Trazodone
Explanation: Trazodone is a serotonin antagonist and reuptake inhibitor. Its receptor effects contribute to its sedating properties.
27. Which of the following is a recognised concern when using bupropion?
A. Increased seizure risk in susceptible patients
B. Guaranteed severe constipation in every patient
C. Complete inhibition of all serotonin receptors
D. Guaranteed respiratory arrest at therapeutic doses
Correct Answer: A. Increased seizure risk in susceptible patients
Explanation: Bupropion can lower the seizure threshold and is contraindicated in certain conditions, including seizure disorders and current or prior bulimia or anorexia nervosa.
28. Which statement about antidepressant drug interactions is correct?
A. Antidepressants never interact with other medicines
B. Combining certain serotonergic medicines can increase the risk of serotonin syndrome
C. Every antidepressant can safely be combined with an MAOI
D. Drug interactions occur only with food
Correct Answer: B. Combining certain serotonergic medicines can increase the risk of serotonin syndrome
Explanation: Certain combinations of antidepressants and other serotonergic medicines can cause serious interactions. Combining an MAOI with incompatible medicines requires particular caution and appropriate washout periods.
29. Which of the following is an important monitoring consideration when starting or changing antidepressant treatment?
A. Monitor for worsening mood or suicidal thoughts when clinically indicated
B. Assume symptoms cannot worsen
C. Stop monitoring as soon as the first dose is taken
D. Increase the dose without consulting the prescriber
Correct Answer: A. Monitor for worsening mood or suicidal thoughts when clinically indicated
Explanation: Monitoring is important after starting treatment or changing the dose, particularly in younger patients. New or worsening suicidal thoughts require prompt professional assessment.
30. Which statement about selecting an antidepressant is most accurate?
A. One antidepressant is best for every patient
B. The choice depends on the patient’s condition, medical history, adverse effects, and other medicines
C. Antidepressants should be selected only by their brand names
D. The same dose is suitable for every patient
Correct Answer: B. The choice depends on the patient’s condition, medical history, adverse effects, and other medicines
Explanation: Treatment should be individualised. A healthcare professional considers diagnosis, previous response, side effects, interactions, patient preferences, and other clinical factors.
📑Quick Revision: Important Antidepressant Drugs
- Fluoxetine: SSRI.
- Sertraline: SSRI.
- Escitalopram: SSRI.
- Venlafaxine: SNRI.
- Duloxetine: SNRI; also used for certain pain conditions.
- Amitriptyline: Tricyclic antidepressant.
- Imipramine: Tricyclic antidepressant.
- Clomipramine: Tricyclic antidepressant used in OCD.
- Phenelzine: MAOI.
- Bupropion: Norepinephrine-dopamine reuptake inhibitor.
- Mirtazapine: Alpha-2 adrenergic receptor antagonist with serotonergic effects.
- Trazodone: Serotonin antagonist and reuptake inhibitor.
- Major SSRI adverse effect: Sexual dysfunction.
- Major TCA safety concern: Cardiac toxicity in overdose.
- Important MAOI precaution: Drug and food interactions.
- Important treatment point: Antidepressants may take several weeks to produce their full therapeutic effect.
📋Frequently Asked Questions
1. What are antidepressant drugs?
Antidepressants are medicines used primarily to treat depression. Depending on the medicine, they may also be prescribed for certain anxiety disorders, OCD, and some chronic pain conditions.
2. What are the main classes of antidepressants?
The major classes include SSRIs, SNRIs, TCAs, MAOIs, and other antidepressants such as bupropion, mirtazapine, and trazodone.
3. Which antidepressant is an SSRI?
Fluoxetine, sertraline, escitalopram, citalopram, paroxetine, and fluvoxamine are examples of SSRIs.
4. Which antidepressants are used for neuropathic pain?
Certain medicines, including duloxetine and amitriptyline, may be used for selected neuropathic pain conditions.
5. Are these MCQs useful for GPAT and pharmacist examinations?
These questions help revise core antidepressant pharmacology for B.Pharm, D.Pharm, GPAT, and pharmacist recruitment examinations. Compare your preparation with the latest official syllabus for your examination.
🎯 Conclusion
These 30 Antidepressant Drugs MCQs cover important drug classes, mechanisms of action, therapeutic uses, and adverse effects. Revise the explanations and practise the questions regularly to strengthen your pharmacology knowledge for pharmacy examinations.
Medical disclaimer: This article is intended for educational and examination-preparation purposes only. It does not replace professional medical advice. Antidepressant medicines should be used under the guidance of a qualified healthcare professional.
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