diphenhydramine
Drowsy allergy pill
Diphenhydramine is an antihistamine drug used to treat allergies, insomnia, and motion sickness.
It blocks histamine receptors, reducing symptoms like sneezing, itching, and hives, while also causing drowsiness—which makes it the active ingredient in many over-the-counter sleep aids.
Brand names include Benadryl and Nytol.
I took some diphenhydramine for my allergies and could barely stay awake.
Substance promoting drowsiness
- insomniaPersistent inability to rest
- drowsinessState of near-sleep
- nighttime formulaSedating medicine for evening
- sedatingCalming with medication
bedtime · sleeplessness · somnolence · grogginess · drowsy · jet lag · sleep cycle · fatigue
Buyable without medical authorization
- anticholinergicBlocks acetylcholine receptors
- first-generationEarliest iteration of something
- allergy reliefTreatment for immune overreactions
- hay feverAllergic rhinitis from pollen
allergic rhinitis · urticaria · allergic reaction · immune response · rash treatment · antipruritic · seasonal allergies · pet dander
Nausea from perceived movement
- nauseaPre-vomiting stomach discomfort
- cough suppressantDrug reducing throat spasms
- ParkinsonismMotor syndrome with tremor, rigidity
- anxiety reliefEasing of mental distress
bee sting · poison ivy · dermatitis · bug bite · skin irritation · vertigo
Flat portable computing device
- capsuleEnclosed dose container
- liquidFree-flowing substance
- dosageMeasured medicine amount
- 25mgSmall measured quantity
50mg · pharmacist · drugstore · active ingredient · generic · brand name · Tylenol PM · drug interactions
Insufficient saliva production
- blurred visionUnclear visual perception
- constipationDifficult, infrequent waste elimination
- confusionMental disorientation or bewilderment
- dizzinessUnsteady, spinning sensation
impaired coordination · cognitive impairment · tachycardia · sedation · delirium · tolerance · dependence
sleep aid
Substance promoting drowsiness
- insomniaPersistent inability to rest
- drowsinessState of near-sleep
- nighttime formulaSedating medicine for evening
sedating · bedtime · sleeplessness · somnolence · grogginess · drowsy · jet lag · sleep cycle · fatigue
over-the-counter
Buyable without medical authorization
- anticholinergicBlocks acetylcholine receptors
- first-generationEarliest iteration of something
- allergy reliefTreatment for immune overreactions
hay fever · allergic rhinitis · urticaria · allergic reaction · immune response · rash treatment · antipruritic · seasonal allergies · pet dander · dust mite allergy
motion sickness
Nausea from perceived movement
- nauseaPre-vomiting stomach discomfort
- cough suppressantDrug reducing throat spasms
- ParkinsonismMotor syndrome with tremor, rigidity
anxiety relief · bee sting · poison ivy · dermatitis · bug bite · skin irritation · vertigo
tablet
Flat portable computing device
25mg · 50mg · pharmacist · drugstore · active ingredient · generic · brand name · Tylenol PM · drug interactions · contraindications
dry mouth
Insufficient saliva production
- blurred visionUnclear visual perception
- constipationDifficult, infrequent waste elimination
- confusionMental disorientation or bewilderment
dizziness · impaired coordination · cognitive impairment · tachycardia · sedation · delirium · tolerance · dependence
diphenhydraminecaffeine
Methylxanthine stimulant compound
amphetamine · ephedrine · stimulant · epinephrine · dextroamphetamine
diphenhydraminecetirizine
Second-generation antihistamine drug
loratadine · Claritin · Zyrtec · Allegra