Pharmacology explores the interactions between drugs and biological systems, as well as the body’s responses to these drugs. This discipline covers a wide range of topics, including the origins, chemical properties, biological effects, and therapeutic uses of drugs. The impact of drugs can range from therapeutic benefits to potential toxicity, and is influenced by various factors. GuruMCQs.com provides an extensive array of pharmacology MCQs, continuously updated to encompass a wide range of topics. These MCQs span various areas such as neuropharmacology, psychopharmacology, toxicology, clinical pharmacology, molecular and cellular pharmacology, and more. Curated from reputable pharmacology references, these MCQs serve as valuable resources for interviews, entrance exams, competitive assessments, and certifications, catering to individuals at all stages of their careers. Additionally, explore MCQson Dental Materials for further study.

**141. Bleeding from the oral mucosa can be reduced by topical use of______________?**
A. Epinephrine
B. Lidocaine
C. Hydrocortisone
D. Dicoumarol
**Answer: A. Epinephrine**

**142. Various insulin preparations useful in the treatment of diabetes mellitus differ primarily in______________?**
A. Focus of action
B. Onset and duration of action
C. Mode of biotransformation
D. None of the above
**Answer: B. Onset and duration of action**

**143. If a patient is given Noradrenaline, what will happen_______________?**
A. Cause an increase in B.P, due to its action on Beta receptors only
B. Cause a decrease in B.P, due to its action on Alpha receptors only
C. Cause a decrease in cardiac output and relax bradycardia
D. None of the above
**Answer: A. Cause an increase in B.P, due to its action on Beta receptors only**

**144. Rebound phenomenon is most commonly seen with the use of_________________?**
A. Epinephrine
B. Norepinephrine
C. Phenylephrine
D. Levo norepinephrine
**Answer: C. Phenylephrine**

**145. The anticoagulant of choice during pregnancy is______________?**
A. Warfarin sodium
B. Sodium oxalate
C. Heparin
D. Phenindione
**Answer: C. Heparin**

**146. Identify the factors that decrease the effect of Oral anticoagulants_______________?**
A. Pregnancy
B. Nephrotic syndrome
C. Newborn
D. Liver disease
E. Both A & B
**Answer: E. Both A & B**

**147. The highest risk associated with the use of oral contraceptives is________________?**
A. Hepatic necrosis
B. Permanent sterility
C. Thromboembolic disorders
D. Cancer of the breast
**Answer: C. Thromboembolic disorders**

**148. Which of the following drugs is not hypoglycemic?**
A. Ethosuximide
B. Tolbutamide
C. Glibenclamide
D. Glucagon
**Answer: A. Ethosuximide**

**149. Steroids________________?**
A. Reduce the rate of repair of tissues thus delay healing
B. Exacerbate the inflammatory response
C. Can be safely given to immunocompromised patients
D. Indicated in oral thrush
**Answer: B. Exacerbate the inflammatory response**

**150. All of the following are endogenous corticosteroids released by all adrenal cortex EXCEPT______________?**
A. Cortisol
B. Cortisone
C. Dexamethasone
D. Aldosterone
**Answer: C. Dexamethasone**

**151. Therapeutic uses of α-adrenoceptor blockers include all of the following EXCEPT______________?**
A. Hypertension
B. Anxiety
C. Peripheral Vascular disease
D. Benign Prostatic hypertrophy
**Answer: B. Anxiety**

**152. Which one of the following drugs is not a non-depolarizing competitive neuromuscular blocker?**
A. Doxacurium
B. Decamethonium
C. Rocuronium
D. Mivacurium
**Answer: B. Decamethonium**

**153. Dry mouth during antidepressant therapy is caused by blockade of______________?**
A. Muscarinic acetylcholine receptors
B. Serotonergic receptors
C. Dopaminergic receptors
D. GABA receptors
**Answer: A. Muscarinic acetylcholine receptors**