I'm coming in late to this thread...
If using a bulberator, be sure to cut a piece of a coffee filter and tape it over the nozzle. This will catch any metal particles from the piercing of the cream charger and also filters any residue that is contained in the cheaper charges. Replace the filter every 50 or so bulbs and you will no longer cough up crud after a good nang session. I no longer get headaches when nanging since i started using a filter, so they could have been associated with breathing in other shit and not the nitrous itself. Even a bit of cloth will suffice, but coffee filters are cheap, readily available and much better for the job.
I used to smash a case+ a night (60 bulbs or more) for over a year and then got onto tanks which was good and bad. My tolerance to nitrous went through the roof and my circulation deteriorated some what. I found myself getting blue feet and hands at times, even when not doing nitrous... This problem seemed to cure itself after cutting back my intake. Definitely did some damage, but nothing and I mean
NOTHING will ever kill my love affair with nitrous. Now days I only use it every 3-7 days, which may sound like a bit, but it's far from where I was at 1-4 years back. I hate to think of the thousands of dollars which I have spent on buying charges from shops, best off buying them online is all I'm going to say in regards to sourcing...
My personal preference of drugs enhanced by nitrous are LSD, psilocybin, mescaline, synthetic phenethylamines, GHB and it's analogues, ketamine/pcp/dxm (some of the best nangs I have ever had have been on combo's of these or one of these substances combo'd with LSD. Dissociatives and nangs just have to be experienced!). Not a big fan of nitrous and MD**, it lost it's magic real quick for me. I've had nitrous on every drug I have tried (which is just about every drug worth trying and many that aren't worth a sack of shit). Alcohol and nitrous doesn't do it for me, yet I hear many boast about it. Cannabinoids (synthetic and natural) can be a bit of fun, but best thrown in with some stronger psychs for a real trip down the rabbit hole or into space or, my favorite, back to the future. Some of my time trips on nitrous still head fuck me to this day. I've had 30 seconds to a minute worth of people at festivals or in a room, go completely into reverse as if someone hit rewind, that's visually and acoustically

some very weird shit indeed. My favorite part (euphoria aside) would have to be the extreme auditory hallucinations and after that would come the visits from various 'beings' when coupling nitrous with large doses of mushrooms

A hard one to time and even be able to do is nitrous while tripping on DMT, great if you can manage it. Also, recently I have been doing nitrous whilst using opiates and it increases the euphoric rushes sometimes, but also does fuck all at other times, even during the same opiate session...
I wonder if nanging is bigger in SE Aus than other parts of the country. I was recently at a large doof in SE Qld with my trusty nanger on me at all times and to my surprise, I saw no other punter carrying or using a nanger for the entire psy festival. Here I was with my gorgeous girl, on a glorious combo of 1,4-b, methylone and LSD, doing bulb after bulb to some of Aus's best psy producers and no one else was hitting the gas in a sea of thousands of crew. Down here in Vic, every third man and his dog is smashing nitrous throughout the festival, you even see tanks on the dance floor at smaller events.
To all those who have not indulged, I just hope that you can control your use if you ever start. I am yet to meet anyone who hasn't enjoyed or REALLY enjoyed nitrous. Once you pop you can't stop.
Looking forward to sharing a case with the first mushrooms of the southern Aus season in coming weeks
The love affair continues %)