It seems a little strange to me that you took 5 grams of harmala with 250mg extract and felt nothing, but everyone is different. I feel the effects at 3 grams, and 4 is usually enough to be in a trance with the nausea and distinct harmala-heavy-headspace... but that's just me.
I believe you were certainly MAOI'd with that dose, and your Spice could have worked much more strongly than with just 3g... but maybe not, considering you are in a small percentage (is he?) of users who don't feel the harmala alks. I know I and everyone I have given them to for sure have.
بسم الله الرحمن الرحيم
Fairly responsible Kratom user.
"whenever he drank ayahuasca, he had such beautiful visions that he used to put his hands over his eyes for fear somebody might steal them."
in between the grinding-brakes of a train crash while aluminum-foil robots make obnoxious sex noises on a static-filled walkie-talkie radio.