muzikbiz22
Contributor
I always use generic/house brand pseudoephedrine 4-6 hour tabs (go my last batch at Walgreen pharmacy). I have never had a problem when doing two dives, as we're typically talking about no more than 1 hour down, then maybe an hour surface interval at most, then another hour down. I take them usually just before getting on the boat. And for me, I find that clearing my ears on the way up is easier than on the way down, so while the pseudoephedrine has never worn off while I was diving, even if it did (and it would not completely wear off anyway) I figure it would not be a huge problem at the end of a dive.
Exactly what this person has posted. Get the generic/house brand, from behind the counter at Target or Walmart, Pseudophedrine HCI, 30mg. These are the 4 to 6 hour versions, and do wonders if needed, YMMV. Target seems to be the cheapest. I'm not a doctor, just sayin' what works for me.