Just to verify you are asking if the drug can be taken under the tounge?
Sublingual, literally ‘under the tongue’, from Latin, refers to a pharmacological route of administration in which certain drugs are entered directly into the bloodstream via absorption under the tongue. Many pharmaceuticals are prepared for subligual administration. These commonly include cardiovascular drugs, steroids, barbituates, some enzymes and increasingly frequently, certain vitamins and minerals.
From Drugs.com :
How should I take trazodone?
• Take trazodone exactly as directed by your doctor. If you do not understand these directions, ask your pharmacist, nurse, or doctor to explain the instructions to you.
• Take each dose with a full glass of water.
• Take trazodone with a meal or a light snack. Food increases the amount of medicine that is absorbed by the body and it may help to decrease dizziness.
• Do not stop taking trazodone without first talking to your doctor, even if you begin to feel better. It may be several weeks before your symptoms begin to improve, and you may require continuous treatment for quite some time.
• Store trazodone at room temperature away from moisture and heat.
From the FDA website:
There appears to be a form of the medication that can be taken sublingually, but this does not mean the particular form of medication you are asking about can.
Jim