It should be readily apparent that the tabs you have are LSD or not, if your experienced with LSD, Nbome and DOx. If not a test kit will help but there is also LSZ and AL LAD that are tryptamines and will test as such but may produce different subjective effects vs LSD. Not all that common though vs Nbome or DOx.
Usually Nbome tabs are dosed at 2-5 times a standard dose. A 1.5 mg tab of 25b Nbome, for example, is 3 x the 500 ug's that put me on my ass. Taste and size are often a give away LSD is usually dosed around 50-75 ugs and maybe a bit more, very rarely 150 ugs-200 ugs (more like fucking never). As a result the tabs are small and not usually overly thick card plus LSD has no taste. Dox, as well as having a distinct metallic taste,needs 1-2 mg to be active so tabs are correspondingly larger. Nbome is just so fucking cheap that tabs are dosed at such stupidly high levels and are often thick and oversized. Nbome makes ones mouth/tongue numb (possibly due to peripheral vaso-constriction) and tastes metallic as well.
One motherfucker you don't want to experience is bromodragonfly. I got a tab of "LSD" with this shit on it and went fucking mental for 20 hours or so...
SoonAJunkie has a point LSD can make emotional states difficult to deal with and blur the individuals perception of reality. She may find your company awful or amazing depending on how the drug effects one's psyche during the experience.