Tachypnea/hyperventilation | Sympathomimetics | Amphetamines | Cocaine | Caffeine | Theophylline | Nicotine | Cathinones | Central hallucinogens | Lysergic acid diethylamide (LSD) | Phencyclidine | Designer amphetamines | Synthetic cannabinoids | Anticholinergics | Drug withdrawal states | Salicylates | Dinitrophenol, pentacholorphenol | Drug-associated hepatic failure | Acetaminophen | Amanita mushrooms | Cellular asphyxiants | Carbon monoxide | Cyanide | Hydrogen sulfide | Methemoglobinemia | Toxins that induce pulmonary edema | Opioids | Pulmonary irritants | Drugs that induce metabolic acidosis (respiratory compensation) | Methanol | Ethylene glycol | Alcoholic ketoacidosis | Iron | Isoniazid | | Bradypnea/hypoventilation | CNS depressants | Opioids | Sedative-hypnotics | Alcohols | Antidepressants | Antipsychotics | Sympatholytics | Volatile inhalants (solvents) | Cholinergics | Muscle relaxants | Antiseizure medications | Respiratory muscle failure | Botulism | Carbamates | Neurotoxic snake envenomation | Neuromuscular blocking agents | Organophosphates | Paralytic shellfish poisoning (saxitoxin) | Puffer fish poisoning (tetrodotoxin) | Strychnine | Tetanus | |