As an adjective sedative

is .

As a noun methapyrilene is

a pyridine antihistamine drug with relatively strong sedative effects.

As nouns the difference between receptor and roxatidine

is that receptor is (biochemistry|medicine) a protein on a cell wall that binds with specific molecules so that they can be absorbed into the cell in order to control certain functions while roxatidine is a particular h₂ receptor antagonist.

As nouns the difference between antagonist and roxatidine

is that antagonist is antagonist (all senses) while roxatidine is a particular h₂ receptor antagonist.

As nouns the difference between nonsedative and mizolastine

is that nonsedative is a drug that is not a sedative while mizolastine is a particular nonsedative antihistamine drug.

As an adjective nonsedative

is not sedative.

As nouns the difference between antihistamine and mizolastine

is that antihistamine is a drug or substance that counteracts the effects of a histamine commonly used to alleviate the symptoms of hay fever and other allergies while mizolastine is a particular nonsedative antihistamine drug.

As nouns the difference between drug and mizolastine

is that drug is (pharmacology) a substance used to treat an illness, relieve a symptom, or modify a chemical process in the body for a specific purpose or drug can be (obsolete) a drudge while mizolastine is a particular nonsedative antihistamine drug.

As a verb drug

is to administer intoxicating drugs to, generally without the recipient's knowledge or consent or drug can be (drag).

As nouns the difference between drug and dexbrompheniramine

is that drug is (pharmacology) a substance used to treat an illness, relieve a symptom, or modify a chemical process in the body for a specific purpose or drug can be (obsolete) a drudge while dexbrompheniramine is a particular antihistamine drug, the dextrorotatory isomer of brompheniramine.

As a verb drug

is to administer intoxicating drugs to, generally without the recipient's knowledge or consent or drug can be (drag).

As an adjective dextrorotatory

is (chemistry|of an optically active compound or crystal) that rotates the plane of polarized light to the right, or clockwise.

As a noun dexbrompheniramine is

a particular antihistamine drug, the dextrorotatory isomer of brompheniramine.

As nouns the difference between isomer and dexbrompheniramine

is that isomer is any of two or more compounds with the same molecular formula but with different structure while dexbrompheniramine is a particular antihistamine drug, the dextrorotatory isomer of brompheniramine.

As nouns the difference between brompheniramine and dexbrompheniramine

is that brompheniramine is an antihistamine drug of the propylamine class while dexbrompheniramine is a particular antihistamine drug, the dextrorotatory isomer of brompheniramine.