This build-up is often an early warning that something is wrong in the body and it is best that a health care provider is consulted without delay. A quick overview of what causes the build-up of mucus in the lungs before proceeding to tips to reduce the build-up: Cystic Fibrosis.
Best Answer: they usually do have a run through of the ceremony before the dinner, that's why it's called a rehearsal dinner. If I were you, I'd try and have the rehearsal the night before and spend time with the wedding party..I wouldn't want my fiance coming to the wedding all tired and hung over-but it's up to you.
If your wedding is an evening wedding, guests should know this, since it's a typical rule of etiquette. You can write on the invitation, Black tie invited so that your guests know that it's a formal wedding. Based on your description of what you want them to wear, this is considered formal wear.