antihistamines

Sneeze-stopping medication

Antihistamines are drugs that block histamine, a compound the body releases during allergic reactions.

They treat symptoms like sneezing, itching, hives, and runny nose: I took an antihistamine before visiting my friend's cat.

Older antihistamines cause drowsiness; newer ones generally don't.

Some are sold over the counter, others require a prescription.

allergies

allergens

Immune reaction triggers

  • pollenFloral reproductive grains
  • dustFine settled particles
  • moldForm-giving container

pet dander · hay fever · sneezing · itchy eyes · runny nose · congestion · hives · seasonal allergies · skin rash · eczema

conditions

allergic rhinitis

Nasal inflammation from allergens

motion sickness · insomnia · nausea · vertigo · sinusitis · conjunctivitis · dermatitis · pruritus

medications

loratadine

Antihistamine compound for allergies

chlorpheniramine · doxylamine · promethazine · meclizine · cromolyn · Benadryl · Claritin · Zyrtec · Allegra · first-generation

drowsiness

sedation

Drug-induced calm state

grogginess · impairment · non-drowsy · first-generation · nighttime formula · sleep aid · anticholinergic

pharmacy

prescription

Medical dispensing authorization

tablets · capsules · syrup · dosage · generic · brand-name · refill · contraindications · drug interactions · side effects

Categories
Opposites
pharmacological mechanism

antihistamineshistamine

Allergy-response compound

histamines · allergens · histidine · sensitizers

drug class function for similar symptoms

antihistaminesdecongestants

Medicines reducing nasal swelling

corticosteroids · bronchodilators · expectorants

therapeutic effect

antihistaminesstimulants

Agents that heighten arousal

caffeine · amphetamines · decongestants

Phrases
Family

antihistamine

Familiarity
Top 100,000
Profile
Used worldwide · Timeless · Concrete · Rated G