Live it up sure, but remember you will suffer the consequences. Crohn's symptoms are indifferent to our desires no matter how badly you may want something. There are plenty of celebrations where I think 'maybe just one piece of cake? one glass of rum?' but the fact is that it is a mistake to be messing with your body that way.
It's really your choice. There are plenty of GI's who say live it up, and there are plenty who say it is all in our heads, and plenty who say you can eat whatever you want. Bull.
Use common sense here and see if the positives outweigh the negatives. Also, remember what you are doing to your body. Just keep in mind the consequences...
I personally would not be messing with it. There are plenty of other ways to have fun on your 21st birthday besides becoming inebriated. I should hope that our society's big 'to do' about an arbitrary number would mean less than your health. You don't have to get your first kiss on your 13th birthday, you don't have to get your permit on the 15th, license on the 16th, you don't have to move out when you're 18, and you certainly don't have to drink on your 21st...
Sorry to be harsh but I just really hope you are truly thinking about the next day, week, month, and so forth. A friend of mine decided it would be okay to have beer 'just this once' and ended up in the hospital with a $3,000 bill on the work that had to be done to ease the damage.
Health seems more important than that kind of fun..
20 years old, Diagnosed with moderate to severe Crohn's and Colitis in May of 2008.
Prednisone 15 mg, pentasa 2 pills 4x a day, bentyl as needed, omeprazole in the morning, multivitamin, humira every other week, and good probiotics.
Surgery for ectopic pregnancy most likely the result of severe Crohn's inflammation in July of 2008.
Attempting a diet without refined sugars, high fat content, bleached or bromated flour, most dairy, red meat, and avoiding anything spicy like the plague. Also refuse to eat anything with trans fat or high fructose/corn syrup.
"He who has a why to live for can bear with almost any how."