Depends what type of aircraft we are talking about, i.e. SEP, MEP, twin-turboprop, jet, etc.
On a SEP, it's usually OK to try to regain the profile by keeping it clean and pushing the stick forward momentarily (fairly small momentum). On a heavier a/c, when on profile (assuming you refer to an instrument approach), the aircraft should already have some flaps out. Any alterations would be done through power, not by messing about with the attitude or the config. These have to be kept within very specific limits (much more so than on a light aircraft) in order to get the right performance.
That is, obviously, within reason; if the loc or glideslope merely start to creep one way or another, then a quick correction on the control column would do the trick - but keeping an eye on the speed too! If you happen to be close to an airliner on short finals, you may hear the quick power alterations (even with autothrottle on).
Cheers
