An extraction device is designed to use suction to remove snake venom if applied within 3 to 5 minutes of a snakebite. It should be left in place for 30 minutes for best results. Do not cut the skin over the bite to use the suction device. An extraction device is not likely to be beneficial if it is not placed within 3 to 5 minutes of a snakebite.

These devices come with different-sized suction cups that attach to the barrel of a syringe. The suction cup is applied over the bite, and the vacuum suction of the syringe draws fluid and venom out. As fluid and venom fill the syringe, the suction vacuum is lost. The devices can be emptied and then reapplied during transport to emergency care.

Extraction devices may cause skin and tissue damage at the application site. Treatment may be needed to prevent infection.

An extraction device is only a temporary first aid measure. Using an extraction device does not guarantee any venom will be removed. A person who has been bitten by a poisonous snake or lizard still requires immediate transport to emergency care. If you were bitten by a known or suspected poisonous snake or lizard, call 911 or other emergency services immediately. Medication (antivenin) to counteract the effects of the poison can save a limb or your life.