Immunotherapy

Sublingual refers to 'under the tongue'. Therefore a sublingual spray would be a spray that is to be sprayed under the tongue.

According to the HealthMad link below, immunotherapy involves the giving of allergen extracts (teeny tiny bits of the allergic material in question - peanut, tree nut, etc) to the patient. This is usually done by either plain old injections or through painless drops under the tongue, known as sublingual therapy. Immunotherapy is far more effective than any other known form of allergy relief, as it is the sole one that can reduce the patient's sensitivity to the allergen. Check out the link I sourced below for more indept information.

Sublingual refers to 'under the tongue'. Therefore a sublingual spray would be a spray that is to be sprayed under the tongue.

Sublingual for easily absorption of the medicine