why does a dissolvable medication work better when dissolved, but not swallowed?

Question

I take hyoscyamine (an anti-spasmodic used for IBS), which no matter the manufacturer is directed to be dissolved under the tongue, not swallowed. Why does it work best when dissolved?

In: 1

Answer 1

Under the tongue the medication is going straight in to the blood stream via the thin skin in your mouth, if you swallow it there’s a whole lot of other things involved before it gets in to your blood… if it even can without being destroyed.