I'm sure the CVS I stopped at was just out...but every box I saw name brand and store brand was extra strenghth. Which is no worries since these pads work. Sleeping hasnt been a problem yet. Yesterday when I got home I just laid in bed all night and I wasn't hurting...untill I got up to to whatever.
The thing is for OTC drugs they always seem to say "extra strength". The key is that the higher dose is taken every 6 hours instead if every 4, but its still safe for preg women to follow recommended dosage instructions. And if all else fails XS is apparently 1000mg for 2 pills vs 650mg for normal strength, so you could always just take 1 pill for 500mg.
I can't remember the last time I bought or took non "extra strength" OTC pills!