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With drugs of this type, muscarine-like symptoms (nausea, vomiting, diarrhea, sweating, increased bronchial and salivary secretions and bradycardia) often appear with overdosage (cholinergic crisis). An important complication that can arise is obstruction of the airway by bronchial secretions. These may be managed with suction (especially if tracheostomy has been performed) and by the use of atropine. Many experts have advocated a wide range of dosages of atropine (for Enlon (edrophonium injection) ®, see atropine dosage below), but if there are copious secretions, up to 1.2 mg intravenously may be given initially and repeated every 20 minutes until secretions are controlled. Signs of atropine overdosage such as dry mouth, flush and tachycardia should be avoided as tenacious secretions and bronchial plugs may form. A total dose of atropine of 5 to 10 mg or even more may be required. The following steps should be taken in the management of overdosage of Enlon (edrophonium injection) ®:
2. Cardiac function should be monitored until complete stabilization has been achieved.
3. Atropine sulfate in doses of 0.4 to 0.5 mg should be administered intravenously. This may be repeated every 3 to 10 minutes. Because of the short duration of action of Enlon (edrophonium injection) ® the total dose required will seldom exceed 2 mg.
4. Pralidoxime chloride (a cholinesterase reactivator) may be given intravenously at the rate of 50 to 100 mg per minute; usually the total dose does not exceed 1000 mg. Extreme caution should be exercised in the use of pralidoxime chloride when the cholinergic symptoms are induced by double-bond phosphorous anticholinesterase drugs.9
5. If convulsions occur or shock is present, appropriate measures should be instituted.
Known hypersensitivity to anticholinesterase agents; intestinal and urinary obstructions of mechanical type.
Last reviewed on RxList: 1/15/2005
This monograph has been modified to include the generic and brand name in many instances.
Additional Enlon Information
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