Is it nontoxic to pour Liquid Plumber down my toilet? Needless to say it is clogged up. I own tried using...

Needless to say it is clogged up. I own tried using a plunger to no avail. I have not flushed anything except usual things you would flush. I have never used Liquid Plumber and not sure if it would mess up the toilet or pipes. I know it may nouns stupid, but any help on the concern would be appreciated.

DRAGON 2008
"I BELIEVE IN U.S."
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I thought that's what solution plumber is for? I have used it several times to flush through the system and have never have a problem.