constipation
"Warning: it does not necessarily take 6-12 hours for this medication to work. Less than an hour after taking 2 of the dulcolax pink pills, the effects began. I have been in the bathroom every 10-20min for the past 4 hours. I recommend taking this medication when you have zero plans or zero intention of getting any sleep. 

On the plus side, tomorrow might be a really great day to wear those jeans that are just a little bit too tight, surely I've lost a couple pounds between these incredibly frequent bathroom trips."