XIV.a

Methemoglobinemia

See also under XIVa. Known since the 1940s (PMID 18883450). Comprehensive list of causal drugs and chemicals available at PMID 1564446. Methemoglobin is the oxidized (Fe3+) species of hemoglobin (Fe2+). Patients present with slate-grey cyanosis, low SpO2, normal SaO2 and PaO2. Normally, methemoglobin is <1%. Levels above 40% can be life-threatening, producing pulmonary edema, cardiovascular collapse (PMID 17122537) CNS disturbances and death. Management includes i.v. methylene blue. A possible rebound increase in MeHb upon treatment requires close monitoring. Excess methylene blue can also produce methemoglobinemia

Last update : 01/01/1970
 

Causative drugs

81

Chemicals

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute, severe (may occasion an ARDS picture)
I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD)
I.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging)
I.j I - Interstitial/parenchymal lung disease
I.j - Lipoid pneumonia, exogenous
I.af I - Interstitial/parenchymal lung disease
I.af - Chemical (toxic) pneumonitis
II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE)
II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury
III.a III - Pulmonary/alveolar hemorrhage
III.a - Alveolar hemorrhage, diffuse (DAH)
III.b III - Pulmonary/alveolar hemorrhage
III.b - Pneumorenal syndrome (w/wo ANCAs)
IV.c IV - Airway involvement
IV.c - Obliterative bronchiolitis (a pattern consistent with) (see also IVn, XVx)
IV.n IV - Airway involvement
IV.n - Obstructive airway dysfunction (see also IVc, XVx)
IV.q IV - Airway involvement
IV.q - Reactive airway dysfunction syndrome (RADS)
V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion
VIII.c VIII - Central-large-upper airway (incl pharyngeal-nasal) involvement
VIII.c - Upper airway obstruction other than angioedema or hematoma
VIII.h VIII - Central-large-upper airway (incl pharyngeal-nasal) involvement
VIII.h - Vocal cord dysfunction, adduction, closure
X.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (Pulmonary and/or systemic) - ANCA status unknown or negative)
X.u X - Systemic/Distant conditions, syndromes and reactions
X.u - Multiple organ dysfunction/failure (MODS/MOF)
X.ac X - Systemic/Distant conditions, syndromes and reactions
X.ac - Anti-GBM antibody disease (Goodpasture-like or flare of preexisting GS)
XI.s XI - Miscellaneous
XI.s - Sniffing death - Death from inhalation of compound
XII.m XII - Cardiovascular involvement / toxicity
XII.m - Cardiac/cardiopulmonary arrest
XIV.a XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.a - Methemoglobinemia
XIV.b XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.b - Sulfhemoglobinemia
XV.x XV - Pathology
XV.x - Path: Acute/subacute bronchiolitis (see also IVc, IVi)
XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp)
XVII.p XVII - Infections & related conditions
XVII.p - Lung abscess/abscesses (see also VIr)
5

Chloroquine

I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD)
I.c I - Interstitial/parenchymal lung disease
I.c - Eosinophilic pneumonia (pulmonary infiltrates and eosinophilia)
I.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging)
I.e I - Interstitial/parenchymal lung disease
I.e - Acute eosinophilic pneumonia (AEP)
II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury
VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension
IX.a IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.a - Diaphragm/inspiratory muscle weakness/paralysis (w/wo ARF)
IX.i IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.i - Respiratory arrest - Apnea
X.a X - Systemic/Distant conditions, syndromes and reactions
X.a - DRESS - DRESS-like reaction
XI.r XI - Miscellaneous
XI.r - Death following exposure or poisoning
XII.f XII - Cardiovascular involvement / toxicity
XII.f - Cardiomyopathy (acute, subacute, chronic)
XII.h XII - Cardiovascular involvement / toxicity
XII.h - Eosinophilic myocarditis
XII.l XII - Cardiovascular involvement / toxicity
XII.l - Cardiac arrhythmias or dysrhythmias (AF, VT, VF, TdP)
XII.m XII - Cardiovascular involvement / toxicity
XII.m - Cardiac/cardiopulmonary arrest
XII.p XII - Cardiovascular involvement / toxicity
XII.p - QT prolongation
XII.s XII - Cardiovascular involvement / toxicity
XII.s - Conduction disorders - Heart block (bundle branch- or AV-)
XIV.a XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.a - Methemoglobinemia
XV.b XV - Pathology
XV.b - Path: Eosinophilic pneumonia (subacute or acute) (see also Ic)
XV.c XV - Pathology
XV.c - Path: Organizing pneumonia (OP/BOOP) pattern (see also Id)
XIX.c XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.c - BAL: An excess proportion of eosinophils
1

E-cigarette - e-vaporizers-ENDS-Vaping-Dabbing

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute, severe (may occasion an ARDS picture)
I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD)
I.c I - Interstitial/parenchymal lung disease
I.c - Eosinophilic pneumonia (pulmonary infiltrates and eosinophilia)
I.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging)
I.e I - Interstitial/parenchymal lung disease
I.e - Acute eosinophilic pneumonia (AEP)
I.j I - Interstitial/parenchymal lung disease
I.j - Lipoid pneumonia, exogenous
I.m I - Interstitial/parenchymal lung disease
I.m - ILD with a granulomatous component
I.u I - Interstitial/parenchymal lung disease
I.u - Relapsing or migrating pneumonitis/pneumonia (see also Id)
I.v I - Interstitial/parenchymal lung disease
I.v - Altered lung function/PFTs (can be subclinical)
I.aw I - Interstitial/parenchymal lung disease
I.aw - Persistent reduction in diffusing capacity for CO upon resolution of the adverse effect
I.ax I - Interstitial/parenchymal lung disease
I.ax - Chronic pneumonitis
II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury
II.u II - Pulmonary edema - Acute lung injury - ARDS
II.u - Acute respiratory failure (ARDS, pulmonary edema, severe bronchospasm) requiring ECMO
III.a III - Pulmonary/alveolar hemorrhage
III.a - Alveolar hemorrhage, diffuse (DAH)
III.c III - Pulmonary/alveolar hemorrhage
III.c - Hemoptysis
IV.d IV - Airway involvement
IV.d - Cough (lone)
IV.f IV - Airway involvement
IV.f - Severe, catastrophic asthma attack (can be fatal)
IV.n IV - Airway involvement
IV.n - Obstructive airway dysfunction (see also IVc, XVx)
IV.t IV - Airway involvement
IV.t - Sptutum production - Bronchorrhea - 'Bronchitis'
IV.v IV - Airway involvement
IV.v - Deterioration/exacerbation of preexisting asthma or COPD
V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax
VII.a VII - Mediastinal involvement
VII.a - Lymphadenopathy (intrathoracic)
VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum
VIII.d VIII - Central-large-upper airway (incl pharyngeal-nasal) involvement
VIII.d - Thermal (burns, frostbite), chemical or caustic facial and/or airway injury
VIII.al VIII - Central-large-upper airway (incl pharyngeal-nasal) involvement
VIII.al - Epiglottitis
VIII.an VIII - Central-large-upper airway (incl pharyngeal-nasal) involvement
VIII.an - Facial/labial/buccal/oral/dental trauma
IX.h IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.h - Dyspnea, unexplained otherwise
IX.af IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.af - Seizures
X.b X - Systemic/Distant conditions, syndromes and reactions
X.b - Antiphospholipid antibodies w/wo the APL syndrome
X.aq X - Systemic/Distant conditions, syndromes and reactions
X.aq - Relapse or flare of preexisting ulcerative colitis
XI.r XI - Miscellaneous
XI.r - Death following exposure or poisoning
XI.ac XI - Miscellaneous
XI.ac - Thermal skin/dermal injury
XI.ay XI - Miscellaneous
XI.ay - Chest tightness
XI.bc XI - Miscellaneous
XI.bc - Polycythemia
XI.bd XI - Miscellaneous
XI.bd - Nicotine poisoning
XI.be XI - Miscellaneous
XI.be - Burns
XII.ag XII - Cardiovascular involvement / toxicity
XII.ag - Bradycardia
XIV.a XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.a - Methemoglobinemia
XV.c XV - Pathology
XV.c - Path: Organizing pneumonia (OP/BOOP) pattern (see also Id)
XV.d XV - Pathology
XV.d - Path: Acute fibrinous organizing pneumonia (AFOP-pattern) (see also If)
XV.e XV - Pathology
XV.e - Path: ILD with a granulomatous component (see also Im)
XV.f XV - Pathology
XV.f - Path: Diffuse alveolar damage (DAD-pattern) (see also IL)
XV.g XV - Pathology
XV.g - Path: Alveolar hemorrhage (see also IIIa)
XV.p XV - Pathology
XV.p - Path: Exogenous lipoid pneumonia
XV.x XV - Pathology
XV.x - Path: Acute/subacute bronchiolitis (see also IVc, IVi)
XV.y XV - Pathology
XV.y - Path: Respiratory bronchiolitis (w/wo the RB-ILD-pattern)
XV.ab XV - Pathology
XV.ab - Path: Pulmonary capillaritis
XV.bi XV - Pathology
XV.bi - Path: Giant-cell interstitial pneumonia (GIP)-pattern
XVI.a XVI - Imaging
XVI.a - Imaging: Diffuse haze
XVI.b XVI - Imaging
XVI.b - Imaging: Ground-glass opacities (GGO) / shadowing
XVI.d XVI - Imaging
XVI.d - Imaging: Alveolar opacities or haze with a batwing or butterfly distribution
XVI.g XVI - Imaging
XVI.g - Imaging: Diffuse whiteout/alveolar shadowing (see also under IIb-ARDS)
XVI.af XVI - Imaging
XVI.af - Imaging: Lung cysts or bullae (see also XVI ah/bf)
XVII.a XVII - Infections & related conditions
XVII.a - Respiratory tract infection incl. pneumonia
XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes
XIX.b XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.b - BAL: An excess proportion of neutrophils
XIX.c XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.c - BAL: An excess proportion of eosinophils
XIX.d XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.d - BAL: Gross or microscopic bleeding/hemorrhage
XIX.f XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.f - BAL: Foamy macrophages
XIX.i XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.i - BAL: Oil red O-stainable material in BAL macrophages othen than exogenous lipids
XIX.n XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.n - BAL: Brown-pigmented macrophages
1