I've noticed that the ROA is a factor in the side effects methamphetamine induces. For the most part smoking is the worst way to use methamp because it kicks in way too fast, way too hard, and does not last long at all, it's extremely fiendish/moreish and let's just say I have a gram of top quality uncut ice, if I am smoking only, it will be gone in 24 hours. If I use other ROA's like my preferred rectal and oral routes often in combination, for example: Use some via the rectal route to kickstart the day, and have effects within 5-10 seconds after pushing the plunger down all the way in 1mL of water in a luer-slip-tip / taper-tip oral syringe.Then, I either put a bigger-looking shard in a capsule, or more often just backload it into an oral syringe and draw up some water [I like the 5mL syringes for this instead of a 5x more concentrated solution in 1mL] and if you have primo shard it should pretty much instantly melt away and dissolve into the water, but I shake the syringe just in case to do my best to homogenize the solution even though it's not going to be IV'd, then I put the syringe tip in my mouth and press the plunger down and drink the methamphetamine / H20 mixture and chase it with a full glass of water or gatorade or something else to ensure it reaches the stomach. It's EXTREMELY fat AND water soluble, so it rapidly is absorbed which is why 99% or more is absorbed using the rectal ROA which is why I like to implement it and eliminate the need to inject crystal, which does have a stronger rush for some but I get pretty much the same rush administering my dose rectally as I would via the intravenous route. So no need to inject it.
Smoking methamphetamine is just way too crazy with it's ups and downs, and waves, and In my experiences and opinion, it's overall the most uncomfortable way of using methamphetamine, and I always wonder what health consequences there are regarding the lungs being exposed to methamphetamine. In general I avoid drugs or anything that uses the lungs / inhaled ROA as a vessel to the bloodstream.
I remember the first time I ever vaporized crystal, I'll never be able to forget that feeling, but the comedown is just so insane its not worth it. However everyone's different, I know many friends who just use the inhaled ROA and vaporize their shards but if I was going to do methamphetamine in crystal form (which I rarely do, or any street drug) I like snorting it because I love the burn and don't do crystal often, it's very very very rare occasions when it's free and high quality glass/ice, and it's a much smoother comedown vs vaporizing but it definitely can be fiendish/moreish but nowhere near the intensity of inhaled vaporized crystal.