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

83

Phenytoin (diphenylhydantoin)

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute and/or severe (may cause ARDS)
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.k I - Interstitial/parenchymal lung disease
I.k - Lung nodule or nodules
II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury
III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage, diffuse (DAH)
III.b III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.b - Pneumorenal syndrome (w/wo ANCAs)
IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma
IV.d IV - Airway involvement
IV.d - Cough (lone)
IV.n IV - Airway involvement
IV.n - Obstructive airway dysfunction (see also IVc, XVx)
VI.d VI - Pulmonary vasculopathies
VI.d - Pulmonary vasculitis or capillaritis
VII.a VII - Mediastinal involvement
VII.a - Lymphadenopathy (intrathoracic)
VII.b VII - Mediastinal involvement
VII.b - Lymphadenopathy with reactive changes
VII.m VII - Mediastinal involvement
VII.m - Malignant lymphoma
X.a X - Systemic/Distant conditions, syndromes and reactions
X.a - DRES syndrome - DRESS-like reaction
X.d X - Systemic/Distant conditions, syndromes and reactions
X.d - Lupus - Lupus syndrome (see also Vd)
X.h X - Systemic/Distant conditions, syndromes and reactions
X.h - Eosinophilic granulomatosis with polyangiitis (Churg-Strauss)
X.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (pulmonary, extrathoracic or systemic)-ANCA status unknown or negative)
X.u X - Systemic/Distant conditions, syndromes and reactions
X.u - Multiple organ dysfunction/failure (MODS/MOF)
XI.ab XI - Miscellaneous
XI.ab - Gingival hypertrophy
XII.m XII - Cardiovascular involvement / toxicity
XII.m - Cardiac/cardiopulmonary arrest
XII.x XII - Cardiovascular involvement / toxicity
XII.x - Sinus arrest
XII.as XII - Cardiovascular involvement / toxicity
XII.as - Giant cell myocarditis
XIII.b XIII - Neoplastic conditions
XIII.b - Lymphoproliferative disease (pulmonary, endobronchial, endothoracic)
XIV.a XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.a - Methemoglobinemia
XV.m XV - Pathology
XV.m - Path: Lymphoid hyperplasia (including nodular- or a lymphocytic interstitial pneumonia pattern)
XV.ab XV - Pathology
XV.ab - Path: Pulmonary capillaritis
XV.ac XV - Pathology
XV.ac - Path: Pulmonary vasculitis other than capillaritis
XV.af XV - Pathology
XV.af - Path: Granulomatous pulmonary vasculitis
XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes
1

Quinine

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)
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
II.j II - Pulmonary edema - Acute lung injury - ARDS
II.j - Transient pulmonary opacities/infiltrates (see also under Iav)
III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage, diffuse (DAH)
III.m III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.m - Coagulopathy
VIII.b VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.b - Hematoma of/around central airway wall potentially causing UAO
VIII.d VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.d - Thermal (burns, frostbite), chemical or caustic facial and/or airway injury
X.a X - Systemic/Distant conditions, syndromes and reactions
X.a - DRES syndrome - DRESS-like reaction
X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal)
X.g X - Systemic/Distant conditions, syndromes and reactions
X.g - Hypersensitivity reaction (may manifest with fever and/or skin, throat or airway involvement)
X.h X - Systemic/Distant conditions, syndromes and reactions
X.h - Eosinophilic granulomatosis with polyangiitis (Churg-Strauss)
X.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (pulmonary, extrathoracic or systemic)-ANCA status unknown or negative)
X.ad X - Systemic/Distant conditions, syndromes and reactions
X.ad - Skin purpura, ecchymoses or necrosis
X.af X - Systemic/Distant conditions, syndromes and reactions
X.af - Thrombotic microangiopathy
XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent
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)
1