After a rather disappointing non-trip with insuffulated ground columbrina seeds I decided to give this substance and route another try, this time with better preparation.
5 seeds of anandenanthera c. were microwave-popped, and crushed in my new-bought mortar (tadaaa! - did I mention that? get a mortar if you plan on doing such preparations), together with some limestone and baking soda (after learning that limestone is nothing more than chalk [CaCO3], I got slight doubts about its solubility - might be that actually caustic potash [CaCO - quite dangerous stuff!] is to be used - these things often get confused in translations - so I added some baking soda to have at least *some* base. End product was nearly a teaspoon of grayish-brownish powder (about as fine as flour) with some dark speckles of seed shells which I just wasnt able to grind down.
The insuffulation was uncomplicated this time, no pain to speak of, and not as nasty a taste (just grind this stuff FINE, then it's ok).
The effects were milder than the last time, though the peak was far more noticeable (quicker insuffulation). I learned that maybe my limestone was none, though, so that might be explained by less base (baking soda).
The effects basically were: noticeable intoxication, slight motor effects, some visuals, general mood elevation.