Sileo (dexmedetomidine oromucosal) Oromucosal Gel for Dogs, 0.09-mg/mL, 3-mL

Sileo is the first and only FDA-approved treatment for canine noise aversion associated with fear and anxiety. Sileo has been proven to work on its own without other treatments or training.

• Fast-acting and easy to administer.
• Helps treat your dog's anxiety due to loud noises such as fireworks and thunder.

Sileo is formulated as a gel that is absorbed into your dog’s body when you apply it to the mucous membranes between your dog’s cheek and gums. Dexmedetomidine (the active ingredient) calms your dog by preventing or reducing specific reactions in the nervous system.

Noise aversion is the set of anxiety- or fear-based behaviors that dogs can display when subjected to “noise triggers.”

Sileo is supplied in a 3-milliliter oral syringe. Each syringe comes with a dosing ring and end cap along with a prescribing information leaflet.

Six dots is equivalent to 1.5 mL, a dose volume that is too great to administer effectively to one side of the mouth without the risk of some of the dose being swallowed or flowing out of the mouth. Administering half of the dose on one side of the mouth and half on the other side maximizes absorption through the mucous membranes.

Much of the excess gel may flow out of the mouth or be swallowed, which would limit the effects on your dog. In a worst case scenario where the entire syringe (3 mL) is accidentally applied to a smaller dog and is fully absorbed, mild to moderate sedation may occur. As always, contact your veterinarian in any situation where you feel your dog has received too much of the prescribed medication.

State and federal medical waste laws apply. The easiest method could be to place the used syringe back into the box and return it to the veterinary clinic. Ask your veterinarian about proper disposal of empty or partially used Sileo syringes.

No. This will cause incorrect dosing. (Also, remember to wear impermeable gloves; see more in the Human Safety questions below.)

Yes, within two weeks, but only if there is enough gel remaining for a complete dose (to minimize the risk of incorrect dosing).

Although dexmedetomidine (the active ingredient in Sileo) cannot be absorbed through intact skin, it can be absorbed through breaks in the skin and through mucous membranes. Therefore, as a precaution, you should wear impermeable disposable gloves when administering SILEO to your dog.

In the case of accidental exposure to the skin, the area should be immediately and thoroughly washed; remove contaminated clothing and contact your physician if you have questions.If Sileo comes in contact with your eyes, nose or mouth, it can be absorbed into your body, so you should flush the exposed area with water for 15 minutes. If you are wearing contact lenses, flush the eyes and then remove contact lenses and continue flushing; seek medical advice immediately. If the drug is absorbed into your body, it can cause symptoms such as lowered blood pressure (which may result in dizziness, fainting, lack of concentration, blurred vision, nausea, cold, clammy or pale skin, rapid, shallow breathing), sleepiness and slower heart rate. Share package information with your physician and tell him/her that SILEO contains an alpha-2 adrenoceptor agonist.