Interstitial pneumonias (acute, lymphocytic)
Lung malignancy
Aspiration pneumonia or pneumonitis
Bacterial, viral, or fungal pneumonia
Cryptogenic organizing pneumonia<unk>  associated with collagen vascular<unk> 
Drug-induced pulmonary toxicity (amiodarone, bleomycin, amphotericin B, carbamazepine, etc.)
Eosinophilic granuloma (Histiocytosis X)
Radiation pneumonitis
Sarcoidosis
Pneumoconiosis (Workplace exposure)
Asbestosis
Berylliosis
Chemical worker's lung
Coal worker's pneumoconiosis
Silicosis
Asbestosis
Berylliosis
Chemical worker's lung
Coal worker's pneumoconiosis
Silicosis
Pulmonary
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic pulmonary edema
Pneumonia
Pneumocystis Pneumonia (PCP)
Pulmonary embolism
Pulmonary hypertension
Tension pneumothorax
Idiopathic pulmonary fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac
Cardiac tamponade
Cardiogenic pulmonary edema (CHF)
Myocardial Infarction
Pericarditis
Myocarditis
Other Associated with Normal/↑ Respiratory Effort
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Other Associated with ↓ Respiratory Effort
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick paralysis
Airway obstruction
Anaphylaxis
Angioedema
Aspiration
Asthma
Cor pulmonale
Inhalation exposure
Noncardiogenic pulmonary edema
Pneumonia
Pneumocystis Pneumonia (PCP)
Pulmonary embolism
Pulmonary hypertension
Tension pneumothorax
Idiopathic pulmonary fibrosis acute exacerbation
Cystic fibrosis exacerbation
Cardiac tamponade
Cardiogenic pulmonary edema (CHF)
Myocardial Infarction
Pericarditis
Myocarditis
Abdominal distension
Anemia
CO Poisoning
Salicylate toxicity
Diabetic ketoacidosis (DKA)
Diaphragm injury
Electrolyte abnormalities
Epiglottitis
Flail chest
Hypotension
Metabolic acidosis
Pneumonia
Pneumothorax/hemothorax
Renal Failure
Sepsis
Toxic ingestion
Guillain-Barre syndrome
Multiple sclerosis
Myasthenia Gravis
Lambert-Eaton Syndrome
Organophosphate toxicity
Stroke (Main)
Tick paralysis
ALS
Ascites
Uncorrected ASD
Congenital heart<unk> 
COPD exacerbation
Fever
Hyperventilation<unk> 
Neoplasm
Obesity
Panic attack
Pleural effusion
Polymyositis
Porphyria
Pregnancy
Rib fracture
Spontaneous pneumothorax
Thyroid<unk> 
URI
Interstitial lung disease
Interstitial pneumonias 
Pneumoconiosis
Lung malignancy
Atypical pneumonia
Aspiration pneumonia or pneumonitis
Lung transplant complications
Bacterial, viral, or fungal pneumonia