Differential Diagnosis
DDx Strength: Weak
Antihistamine, Multiple skin lesions Add or remove findings

Urticaria

2/2
UrticariaUrticaria

Exanthematous drug eruption

2/2
Exanthematous drug eruptionExanthematous drug eruption

Allergic contact dermatitis

2/2
Allergic contact dermatitisAllergic contact dermatitis

Anaphylaxis

2/2
Anaphylaxis

Candidiasis

2/2
CandidiasisCandidiasis

Dermographism

2/2
DermographismDermographism

Livedo reticularis

2/2
Livedo reticularisLivedo reticularis

Psoriasis

2/2
PsoriasisPsoriasis

Seborrheic dermatitis

2/2
Seborrheic dermatitisSeborrheic dermatitis

Xerosis

2/2
XerosisXerosis

Drug-induced photosensitive reaction

2/2
Drug-induced photosensitive reactionDrug-induced photosensitive reaction

Drug-induced hepatotoxicity

2/2
Drug-induced hepatotoxicity

Fixed drug eruption

2/2
Fixed drug eruptionFixed drug eruption

Angioedema

2/2
AngioedemaAngioedema

Subacute cutaneous lupus erythematosus

2/2
Subacute cutaneous lupus erythematosusSubacute cutaneous lupus erythematosus

Acquired ichthyosis

2/2
Acquired ichthyosisAcquired ichthyosis

Erythema multiforme

2/2
Erythema multiformeErythema multiforme

Erythroderma

2/2
ErythrodermaErythroderma

Leukocytoclastic vasculitis

2/2
Leukocytoclastic vasculitisLeukocytoclastic vasculitis

Lichenoid drug eruption

2/2
Lichenoid drug eruptionLichenoid drug eruption

Pruritus without rash

2/2
Pruritus without rashPruritus without rash

Urticarial vasculitis

2/2
Urticarial vasculitisUrticarial vasculitis

Vasculitis

2/2
VasculitisVasculitis

Acute generalized exanthematous pustulosis

2/2
Acute generalized exanthematous pustulosisAcute generalized exanthematous pustulosis

Baboon syndrome

2/2
Baboon syndromeBaboon syndrome

Interstitial granulomatous drug reaction

2/2
Interstitial granulomatous drug reactionInterstitial granulomatous drug reaction

Symmetric drug-related intertriginous and flexural exanthema

2/2
Symmetric drug-related intertriginous and flexural exanthema

Erythema annulare centrifugum

2/2
Erythema annulare centrifugumErythema annulare centrifugum

Systemic contact dermatitis

2/2
Systemic contact dermatitisSystemic contact dermatitis

Toxic epidermal necrolysis

2/2
Toxic epidermal necrolysisToxic epidermal necrolysis

Drug-induced hypersensitivity syndrome

2/2
Drug-induced hypersensitivity syndromeDrug-induced hypersensitivity syndrome

Bullous drug eruption

2/2
Bullous drug eruptionBullous drug eruption

Drug-induced photoallergic reaction

2/2
Drug-induced photoallergic reactionDrug-induced photoallergic reaction

Erosive balanitis

2/2
Erosive balanitisErosive balanitis

Pseudolymphoma

2/2
PseudolymphomaPseudolymphoma

Pustular psoriasis

2/2
Pustular psoriasisPustular psoriasis

Stevens-Johnson syndrome

2/2
Stevens-Johnson syndromeStevens-Johnson syndrome

Aplastic anemia

2/2
Aplastic anemiaAplastic anemia

Henoch-Schönlein purpura

2/2
Henoch-Schönlein purpuraHenoch-Schönlein purpura

Keratoconjunctivitis sicca syndrome

1/2
Keratoconjunctivitis sicca syndrome

Drug-induced cough

1/2
Drug-induced cough

Drug-induced diarrhea

1/2
Drug-induced diarrhea

Drug-induced nausea or vomiting

1/2
Drug-induced nausea or vomiting

Migraine headache

1/2
Migraine headache

Orthostatic hypotension

1/2
Orthostatic hypotension

Parkinsonism

1/2
Parkinsonism

Asthma

1/2
Asthma

Depressive disorders

1/2
Depressive disorders

Drug-induced abdominal pain

1/2
Drug-induced abdominal pain

Drug-induced ataxia

1/2
Drug-induced ataxia

Drug-induced dyspepsia

1/2
Drug-induced dyspepsia

Drug-induced syncope

1/2
Drug-induced syncope

Gynecomastia

1/2
GynecomastiaGynecomastia

Insomnia

1/2
Insomnia

Ventricular tachycardia

1/2
Ventricular tachycardia

Drug-induced somnolence

1/2
Drug-induced somnolence

Drug-induced headache

1/2
Drug-induced headache

Drug-induced constipation

1/2
Drug-induced constipation

Delirium

1/2
Delirium

Drug-induced fatigue

1/2
Drug-induced fatigue

Drug-induced myopathies

1/2
Drug-induced myopathies

Seizure

1/2
Seizure

Drug-induced dysgeusia

1/2
Drug-induced dysgeusia

Drug-induced epistaxis

1/2
Drug-induced epistaxis

Drug-induced erectile dysfunction

1/2
Drug-induced erectile dysfunction

Prolonged QT interval

1/2
Prolonged QT interval

Acute interstitial nephritis

1/2
Acute interstitial nephritis

Acute kidney injury

1/2
Acute kidney injury

Acute pancreatitis

1/2
Acute pancreatitisAcute pancreatitis

Anticholinergic syndrome

1/2
Anticholinergic syndrome

Brugada syndrome

1/2
Brugada syndrome

Bruxism

1/2
Bruxism

Complete atrioventricular block

1/2
Complete atrioventricular block

Drug-induced akathisia

1/2
Drug-induced akathisia

Drug-induced alopecia

1/2
Drug-induced alopeciaDrug-induced alopecia

Drug-induced anorexia

1/2
Drug-induced anorexia

Drug-induced anxiety

1/2
Drug-induced anxiety

Drug-induced arthralgia

1/2
Drug-induced arthralgia

Drug-induced diaphoresis

1/2
Drug-induced diaphoresis

Drug-induced dizziness

1/2
Drug-induced dizziness

Drug-induced dyspnea

1/2
Drug-induced dyspnea

Drug-induced hypertension

1/2
Drug-induced hypertension

Drug-induced hypotension

1/2
Drug-induced hypotension

Drug-induced leukopenia

1/2
Drug-induced leukopenia

Drug-induced palpitations

1/2
Drug-induced palpitations

Drug-induced rhinitis

1/2
Drug-induced rhinitis

First-degree atrioventricular block

1/2
First-degree atrioventricular block

Follicular conjunctivitis

1/2
Follicular conjunctivitisFollicular conjunctivitis

Hairy tongue

1/2
Hairy tongueHairy tongue

Heat stroke

1/2
Heat stroke

Hypocalcemia

1/2
Hypocalcemia

Hypoglycemia

1/2
Hypoglycemia

Labyrinthitis

1/2
Labyrinthitis

Ocular drug reaction

1/2
Ocular drug reaction

Serotonin syndrome

1/2
Serotonin syndrome

Sick sinus syndrome

1/2
Sick sinus syndrome

Sinus bradycardia

1/2
Sinus bradycardia

Substance-induced sexual dysfunction

1/2
Substance-induced sexual dysfunction

Vitamin B12 deficiency

1/2
Vitamin B12 deficiencyVitamin B12 deficiency

Acute eosinophilic pneumonia

1/2
Acute eosinophilic pneumoniaAcute eosinophilic pneumonia

Acute intermittent porphyria

1/2
Acute intermittent porphyria

Cervical dystonia

1/2
Cervical dystonia

Drug-induced dysphagia

1/2
Drug-induced dysphagia

Drug-induced dystonia

1/2
Drug-induced dystonia

Drug-induced fever

1/2
Drug-induced fever

Drug-induced hepatitis

1/2
Drug-induced hepatitis

Torsades de pointes

1/2
Torsades de pointes

Acute liver failure

1/2
Acute liver failure

Aseptic meningitis

1/2
Aseptic meningitis

Drug-induced chest pain

1/2
Drug-induced chest pain

Drug-induced hyperlipasemia

1/2
Drug-induced hyperlipasemia

Drug-induced leukocytosis

1/2
Drug-induced leukocytosis

Drug-induced menstrual changes

1/2
Drug-induced menstrual changes

Drug-induced movement disorders

1/2
Drug-induced movement disorders

Drug-induced ototoxicity

1/2
Drug-induced ototoxicity

Drug-induced paresthesia

1/2
Drug-induced paresthesia

Drug-induced psychosis

1/2
Drug-induced psychosis

Drug-induced weakness

1/2
Drug-induced weakness

Galactorrhea

1/2
GalactorrheaGalactorrhea

Hemolytic anemia

1/2
Hemolytic anemia

Hyperprolactinemia

1/2
Hyperprolactinemia

Hyponatremia

1/2
Hyponatremia

Rhabdomyolysis

1/2
Rhabdomyolysis

Suppurative parotitis

1/2
Suppurative parotitis

Tardive dyskinesia

1/2
Tardive dyskinesia

Acute otitis media

1/2
Acute otitis media

Drug-induced anemia

1/2
Drug-induced anemia

Drug-induced hyperamylasemia

1/2
Drug-induced hyperamylasemia

Drug-induced jaundice

1/2
Drug-induced jaundiceDrug-induced jaundice

Gastric hypochlorhydria

1/2
Gastric hypochlorhydria

Idiopathic intracranial hypertension

1/2
Idiopathic intracranial hypertensionIdiopathic intracranial hypertension

Talc-associated lung disease

1/2
Talc-associated lung disease