Respiratory System Drugs Practice Questions

Q: Advantage of formoterol over salmeterol is?

It has got a faster onset of action. ***It has got a faster onset of action*** - **Formoterol** has a **faster onset of action** (within 1-3 minutes) compared to salmeterol, making it suitable for both maintenance and quick relief of bronchoconstriction. - This rapid onset allows it to act similarly to short-acting beta-agonists (SABAs) for symptom control, while also providing long-acting benefits. *Both can be used for prophylaxis in asthmatics* - While both **formoterol** and **salmeterol** are **long-acting beta-2 agonists (LABAs)** [1] and are used for prophylaxis (maintenance therapy) in asthma, this statement does not highlight an advantage of formoterol over salmeterol. - Their primary role is in preventing symptoms, not necessarily in acute relief due to this shared characteristic. *It is a long-acting beta 2 agonist* - Both **formoterol** and **salmeterol** are **long-acting beta-2 agonists** [1]. - This is a shared characteristic and not a unique advantage of formoterol over salmeterol. *It has minimal beta 1 agonistic action* - Both **formoterol** and **salmeterol** are *highly selective* for **beta-2 receptors** [1], meaning they both have minimal beta-1 agonistic action. - Therefore, this is not a distinguishing advantage of formoterol over salmeterol.

Q: Which of the following is not an anti histaminic drug of the ethanolamine group?

Chlorpheniramine. ***Chlorpheniramine*** - belongs to the **propylamine chemical class** of antihistamines. - It is a first-generation antihistamine known for its modest **sedative effects** and significant **anticholinergic activity**. *Clemastine* - is a first-generation antihistamine of the **ethanolamine class**. - It is known for its relatively **long duration of action** and pronounced **sedative** and **anticholinergic effects**. *Diphenhydramine* - is a classic first-generation antihistamine belonging to the **ethanolamine class**. - It is commonly used for **allergies**, **insomnia**, and **motion sickness** due to its strong **sedative** and **anticholinergic properties**. *Dimenhydrinate* - is a salt of **diphenhydramine** and 8-chlorotheophylline, and thus falls under the **ethanolamine class** as its primary active component. - It is primarily used to prevent and treat **nausea**, **vomiting**, and **dizziness associated with motion sickness**.

Q: What is the classification of Omalizumab?

Anti-IgE antibody. ***Anti-IgE antibody*** - **Omalizumab** is a **monoclonal antibody** specifically designed to bind to free **immunoglobulin E (IgE)** in the blood [1], [2]. - By binding IgE, it prevents IgE from attaching to its receptors on **mast cells** and **basophils**, thus inhibiting the release of inflammatory mediators involved in allergic reactions [3]. *Anti-IgM antibody* - **Anti-IgM antibodies** are not used as a therapeutic intervention for asthma or allergies as IgM is primarily involved in primary immune responses and forms a pentamer. - Therapeutic antibodies typically target specific molecules involved in disease pathology, and IgM is not a primary target for allergic conditions. *Anti-IgG antibody* - **Anti-IgG antibodies** are generally not used in the treatment of allergic conditions or asthma, as **IgG** is mainly involved in secondary immune responses and provides long-term immunity. - While IgG can be targeted in some autoimmune conditions, it is not the mechanism of action for omalizumab. *Anti-IgD antibody* - **Anti-IgD antibodies** have no known therapeutic application in allergic asthma or similar conditions. - **IgD** is found on the surface of B cells and plays a role in B cell activation, but it is not directly involved in the allergic cascade targeted by omalizumab.

Q: What is the primary use of leukotriene antagonists in asthma management?

For long-term control of asthma symptoms.. ***For long-term control of asthma symptoms.*** - Leukotriene antagonists, such as **montelukast** and **zafirlukast**, work by blocking the action of leukotrienes, which are inflammatory mediators. - This action helps to reduce airway inflammation and bronchoconstriction, leading to improved **lung function** and fewer asthma symptoms over time. - They are classified as **controller medications** for long-term asthma management, not rescue medications. *To reduce the frequency of asthma attacks in mild to moderate cases.* - While leukotriene antagonists can help reduce asthma attack frequency, their primary role is broader, focusing on **overall long-term symptom control**. - Their efficacy in preventing attacks in mild to moderate cases is part of their long-term control mechanism, rather than their sole or primary use. *As an adjunct therapy to inhaled corticosteroids.* - Leukotriene antagonists are often used as an **add-on therapy** when inhaled corticosteroids alone are insufficient, but this describes their placement in treatment rather than their primary purpose. - Their primary use is to achieve better symptom control and reduce inflammation, complementing, rather than simply supplementing, first-line treatments. *As a first-line treatment for acute asthma attacks.* - Leukotriene antagonists have a **slow onset of action** and are not suitable for the rapid relief required during an acute asthma attack. - **Short-acting beta-agonists (SABAs)** are the preferred medication for immediate relief of acute asthma symptoms due to their rapid bronchodilatory effects.

Q: Which of the following drugs is commonly used as a rescue medication for acute asthma attacks?

Salbutamol. ***Salbutamol*** - **Salbutamol** (albuterol) is a **short-acting beta-2 agonist (SABA)** that rapidly relaxes bronchial smooth muscle. - Its quick onset of action makes it ideal for immediate relief of **bronchoconstriction** during an acute asthma attack. - It is the **most commonly used** and **first-line rescue medication** for acute asthma worldwide. *Terbutaline* - **Terbutaline** is also a **short-acting beta-2 agonist (SABA)** similar to salbutamol and can be used as a rescue medication. - While it has comparable bronchodilator effects, **salbutamol is more commonly used** as the preferred rescue inhaler in clinical practice. - Both are SABAs, but salbutamol has become the standard first-choice rescue medication globally. *Theophylline* - **Theophylline** is a **methylxanthine** that acts as a bronchodilator but has a **narrow therapeutic index** and slower onset of action. - It is used as a **maintenance therapy** for chronic asthma and not as a rescue drug for acute exacerbations. *Budesonide* - **Budesonide** is an **inhaled corticosteroid (ICS)** used as a **long-term controller medication** to reduce airway inflammation. - It has a slow onset of action and is *not* effective for immediate relief during an acute asthma attack.

Q: What is an atypical side effect of montelukast?

Churg-Strauss syndrome. ***Churg-Strauss syndrome*** - The apparent development of **Churg-Strauss syndrome** (eosinophilic granulomatosis with polyangiitis) has been reported in patients treated with montelukast, although it is believed to be related more to the unmasking of the disease rather than a direct drug effect. - This typically occurs when **corticosteroids** are tapered or withdrawn as montelukast takes over, revealing the underlying vasculitis. *Goodpasture syndrome* - **Goodpasture syndrome** is an autoimmune disease causing rapidly progressive glomerulonephritis and pulmonary hemorrhage, characterized by anti-glomerular basement membrane (GBM) antibodies. - There is no established association between montelukast use and the development of Goodpasture syndrome. *Membranous glomerulonephritis* - **Membranous glomerulonephritis** is a common cause of nephrotic syndrome, characterized by immune complex deposition on the glomerular basement membrane. - This condition is not typically linked to the use of montelukast. *Bronchial asthma* - **Bronchial asthma** is the condition montelukast is used to treat, acting as a leukotriene receptor antagonist to reduce inflammation and bronchoconstriction. - It is a primary indication for the drug, not a side effect.

Q: Maximum effect of bronchodilatation in asthma is caused by -

Beta 2-Agonist. ***Beta 2-Agonist*** - **Beta-2 agonists** directly relax bronchial smooth muscle by stimulating beta-2 adrenergic receptors, leading to significant and rapid bronchodilation. - This direct action on airway muscle relaxation makes them the most potent and fastest-acting bronchodilators for acute asthma symptoms. *Corticosteroids* - **Corticosteroids** reduce airway inflammation and hypersensitivity over time but do not provide immediate or maximal bronchodilation. - Their primary role is in long-term control of asthma, preventing exacerbations rather than acutely reversing bronchospasm. *Theophylline* - **Theophylline** is a methylxanthine that causes modest bronchodilation by inhibiting phosphodiesterase and blocking adenosine receptors. - It has a narrow therapeutic index, numerous side effects, and is less effective than beta-2 agonists for bronchodilation. *Anticholinergic* - **Anticholinergics** (e.g., ipratropium) block muscarinic receptors, preventing acetylcholine-induced bronchoconstriction. - They provide bronchodilation but are generally less potent and have a slower onset of action compared to beta-2 agonists in asthma.

Q: Which of the following is a long-acting beta-2 agonist?

Formoterol. ***Formoterol*** - **Formoterol** is a **long-acting beta-2 agonist (LABA)** commonly used in the treatment of asthma and COPD. - It provides **bronchodilation** for up to 12 hours due to its high lipophilicity, allowing it to remain in the cell membrane and continuously activate beta-2 receptors. *Isoprenaline (non-selective adrenergic agonist)* - **Isoprenaline** is a **non-selective beta-adrenergic agonist**, meaning it activates both beta-1 and beta-2 receptors. - It is **short-acting** and primarily used as a vasodilator or to stimulate heart rate, not as a long-acting bronchodilator. *Ephedrine (non-selective adrenergic agonist)* - **Ephedrine** is a **mixed-acting sympathomimetic amine** that increases the release of norepinephrine and directly stimulates alpha and beta receptors. - It has a short duration of action and is primarily used as a decongestant or bronchodilator in emergency situations, not as a long-acting agent. *Salbutamol (short-acting beta-2 agonist)* - **Salbutamol** is a **short-acting beta-2 agonist (SABA)**, providing rapid onset but a short duration of action (typically 4-6 hours). - It is used for **relieving acute bronchospasm** and is not considered a long-acting medication for maintenance therapy.

Q: What is the drug of choice for most forms of interstitial lung disease?

Corticosteroids. ***Corticosteroids*** - **Corticosteroids** are the **drug of choice** for many forms of **interstitial lung disease (ILD)** due to their potent **anti-inflammatory** and **immunosuppressive properties**, which help reduce lung inflammation and prevent fibrosis. - They are particularly effective in inflammatory ILDs such as **sarcoidosis**, **hypersensitivity pneumonitis**, and some **connective tissue disease-associated ILDs**. *Antibiotics* - **Antibiotics** are primarily used to treat bacterial and other microbial infections and are **not effective** against the **inflammatory and fibrotic processes** characteristic of most ILDs. - They might be used if there's a **secondary bacterial infection** complicating ILD, but not as primary treatment for the ILD itself. *Bronchodilators* - **Bronchodilators** work by relaxing the muscles around the airways, making them wider and easier to breathe through, which is beneficial in conditions like **asthma** or **COPD**. - They are **not primarily used** in ILD as the main problem is **inflammation and scarring of the lung tissue**, not reversible airway constriction. *Aspirin* - **Aspirin** is an **NSAID** with **anti-inflammatory**, **anti-platelet**, and **analgesic properties**, commonly used for pain relief, fever reduction, and cardiovascular protection. - It has **no established role** in the primary treatment of **interstitial lung disease**, as its anti-inflammatory effects are typically insufficient for the severe inflammation seen in ILD.

Q: Which of the following is NOT a beta-2 agonist?

Ketotifen. ***Ketotifen*** - **Ketotifen** is an **oral anti-allergic drug** that acts as a **mast cell stabilizer** and **H1-antihistamine**, not a beta-2 agonist. - It is used for **prophylactic treatment** of asthma and allergic conditions, working through different mechanisms than bronchodilators. *Terbutaline* - **Terbutaline** is a **short-acting beta-2 agonist (SABA)** used for bronchodilation in asthma and COPD [2]. - Available in **oral, inhaled, and injectable forms** for rapid relief of bronchospasm. *Salbutamol* - **Salbutamol** (also known as albuterol) is a **short-acting beta-2 agonist (SABA)** and the most widely used rescue inhaler for asthma [1], [2]. - Provides **rapid bronchodilation** by stimulating beta-2 receptors in airway smooth muscles [3]. *Bambuterol* - **Bambuterol** is a **long-acting beta-2 agonist (LABA)** that is a prodrug of **terbutaline**. - It is slowly converted to the active form in the body, providing **sustained bronchodilation** for maintenance therapy.

Question 1

Advantage of formoterol over salmeterol is?

Accepted Answer

It has got a faster onset of action

Answer

Both can be used for prophylaxis in asthmatics

Answer

It is a long-acting beta 2 agonist

Answer

It has minimal beta 1 agonistic action

Question 2

Which of the following is not an anti histaminic drug of the ethanolamine group?

Accepted Answer

Chlorpheniramine

Answer

Diphenhydramine

Answer

Clemastine

Answer

Dimenhydrinate

Question 3

What is the classification of Omalizumab?

Accepted Answer

Anti-IgE antibody

Answer

Anti-IgM antibody

Answer

Anti-IgG antibody

Answer

Anti-IgD antibody

Question 4

What is the primary use of leukotriene antagonists in asthma management?

Accepted Answer

For long-term control of asthma symptoms.

Answer

To reduce the frequency of asthma attacks in mild to moderate cases.

Answer

As an adjunct therapy to inhaled corticosteroids.

Answer

As a first-line treatment for acute asthma attacks.

Question 5

Which of the following drugs is commonly used as a rescue medication for acute asthma attacks?

Accepted Answer

Salbutamol

Answer

Theophylline

Answer

Terbutaline

Answer

Budesonide

Question 6

What is an atypical side effect of montelukast?

Accepted Answer

Churg-Strauss syndrome

Answer

Goodpasture syndrome

Answer

Membranous glomerulonephritis

Answer

Bronchial asthma

Question 7

Maximum effect of bronchodilatation in asthma is caused by -

Accepted Answer

Beta 2-Agonist

Answer

Corticosteroids

Answer

Theophylline

Answer

Anticholinergic

Question 8

Which of the following is a long-acting beta-2 agonist?

Accepted Answer

Formoterol

Answer

Isoprenaline

Answer

Ephedrine

Answer

Salbutamol

Question 9

What is the drug of choice for most forms of interstitial lung disease?

Accepted Answer

Corticosteroids

Answer

Antibiotics

Answer

Bronchodilators

Answer

Aspirin

Question 10

Which of the following is NOT a beta-2 agonist?

Accepted Answer

Ketotifen

Answer

Terbutaline

Answer

Salbutamol

Answer

Bambuterol

Respiratory System Drugs — MCQs

Respiratory System Drugs — MCQs

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