Oral and topical drug for nasal decongestion is -
Ans. is 'a' i.e., Phenylephrine Phenytephrineo It is selective alpha 1 agonist.o Topically it is used as nasal decongestant and in eye for producing mydriasis when cycloplegia is not required,o It is also a part of oral nasal decongestant preparations.
Phenylephrine
Histamine
Methoxamine
Dopamine
Adrenergic System