Describe in detail the synthesis of Methadone and enlist any two of its
therapeutic uses.
Explain how ionization influences drug absorption and distribution.
Discuss the role of solubility and partition coefficient in drug action.
Explain the biosynthesis of acetylcholine, mentioning the key enzymes
involved. Describe the role of acetylcholinesterase in the catabolism of
acetylcholine.
Describe the structural modifications in acetylcholine to increase its
selectivity and stability.
What are major tranquilizers? Classify them with examples and discuss
their mechanism of action.
Discuss the structural requirements for a compound to exhibit
anticonvulsant activity.
Drugs can influence adrenergic responses through a variety of
mechanisms. Write a note on biosynthesis, storage and release
mechanism of catecholamines
Outline the synthesis of Carbamazepine and describe its metabolic
pathways, including major metabolites.
An antifungal agent forms strong chelates with divalent metal ions,
reducing its efficacy in vivo.Discuss how chelation affects drug action
and propose strategies to overcome this challenge.Describe the role of
hydrogen bonding in modulating drug-receptor interactions for
antifungal activity.
How does the addition of a carbamate group in carbachol enhance its
activity compared to acetylcholine?Explain the importance of the β-
methyl group in methacholine and its effect on receptor selectivity.
Write a detailed note on opioid based anti-diarrheal agents
, Why does the introduction of an aromatic ring in the structure of
carbamazepine enhance its anticonvulsant activity compared to urea
derivatives like phenacemide?
What is bioisosterism? Provide examples to explain its application in
drug design.How does the partition coefficient influence the
pharmacokinetics of a drug?
Match the following
Drug Column A Column B
1 Physostigmine a)Longer duration of action i)used in Alzheimer’s disease
2 Neostigmine b)Reversible inhibitor; ii)used in myasthenia gravis
penetrates CNS
3 Pyridostigmine c)Irreversible inhibitor iii)enhances neuromuscular
transmission
4 Edrophonium d)Quaternary amine iv)widely used as an insecticide
5 Malathion e)Rapid and short-acting; v) used for diagnostic purposes in
myasthenia gravis
Describe in detail the synthesis of Methadone and enlist any two of its
therapeutic uses.
Discuss the role of solubility and partition coefficient in drug action.
What is chelation, and how does it enhance or inhibit drug activity?
With respect to cholinergic drugs answer the following questions
1). Why is Pralidoxime ineffective if administered 36 hrs after exposure
to insecticide?
2) Name a muscarinic antagonist belonging to the class of aminoamides,
draw its
structure and give its therapeutic use
Give reason for the following. Support your answer - with suitable