Zyrtec-D Allergy tablets?

I have a hard time swallowing pills. The tablets are as big as an M&M. I've tried swallowing skittles and M&Ms to practice, and I keep gagging. My mom told me that gargling should work, but it doesn't. I tried a lot of things. And I don't wanna waste it, my mom made 20 dollars for it. I have nasal congestion, and my doctor prescribed this to me. Is there any other way I can take it? Is it safe for me to crush them, or break it into little pieces? I'm 16 years old btw.