Taking medications under your tongue produces faster action of the medication, sometime not for your benefit

This is called sublingual dosing of a drug. For some medications, slow action is better than fast action, especially for drugs that drop the blood pressure or have heart effects that are supposed to be taken as a pill. See this article here: http://journalofpharmaceuticalresearch.org/index.php/kpc/article/viewFile/118766/81984