Questions on Drowning [ShrewsCon Stay Out!]

[Reynard]

I am wondering if there are any rules -- official, preferably, but others will do in a pinch -- regarding what happens to a character underwater and holding his breath when he gets hit in combat, if anything? The rules seem to indicate that you can hold your breath for 2x your Con score in rounds, unless you swimming when it is 1x, or unless you are fighting when it is 1/2x. But say you are injured or grappled? Does injury require a save of any sort? Usually D&D doesn't go into this level of detail, but I thought I would ask just in case.

 

[Patryn of Elvenshae]

No rules as such. You get to keep holding your breath until time runs out, at which point you need to start rolling dice to determine whether or not you can keep it held.

Note that the rules on holding your breath are as follows:

You can hold your breath for a number of rounds equal to your Constitution score, but only if you do nothing other than take move actions or free actions. If you take a standard action or a full-round action (such as making an attack), the remainder of the duration for which you can hold your breath is reduced by 1 round. (Effectively, a character in combat can hold his or her breath only half as long as normal.)