Will Sleeping Upright Help my Breasts Drop?

If your PS surgeon advised you to sleep elevated, follow his instructions.  Sleeping upright may help with swelling as well. 

SEE VIDEO with EXERCISES BELOW. This video illustrates some of the exercises as well as upper pole band to promote descent of the breast implants. I sometimes encourage patients to do this twice or three times as frequently on the higher side

Disclaimer: Every surgeon has different post-operative instructions, or preferences, regarding post-operative care. You should listen to your own surgeon.
It is standard protocol for a patient to sleep on their back with their head slightly elevated after surgery. This will help with the swelling. But it is also only for the first few days.
If you really want to sleep on your side and feel comfortable doing so, it’s ok. Feeling comfortable is the key here, and the timing is different from patient to patient.
There is no long term benefit to how you sleep. It has more to do with managing the initial states of the recovery period.

Breast
implant position would be minimally impacted by sleeping in the upright
position. Although this maneuver might
have a slight impact on swelling, its biggest impact would be upon your ability
to sleep. For this reason, we see no
benefit to sleeping in this position for prolonged periods of time.The period of time immediately
following breast augmentation surgery is characterized by rapid change. During this period, swelling, muscle spasm,
and the healing process itself all contribute to changes in the appearance of a
woman’s breast.In some cases, swelling
and muscle spasm can cause upper breast fullness.When swelling and muscle spasm
resolve, the implants will drop into a more normal position.Significant progress can be seen in four to
six weeks, but changes can be expected up to six months following surgery.