[Zmith]

I haven't tested it ingame, but it should work I guess.

PHP Code:

public OnPlayerTakeDamage(playerid, issuerid, Float: amount, weaponid, bodypart)
{
    new Float:HP;
    GetPlayerHealth(playerid, HP);
    if(HP == 5)
    {
        SetPlayerHealth(playerid, 5);//If this doesn't work, you could set the player's health -1 and create a timer to set it back to 5.
    }
    return 1;
}