Hello and welcome!
Sound words from King Tryptamine there. Here's what I've found by having a look at some readily available data, plus a bit of background knowledge:
Amlodipine clearance may be decreased through a Cyp450 interaction, leading to increased levels of amlodipine:
"
InteractionsSeveral drugs interact with amlodipine to increase its levels in the body. CYP3A inhibitors, by nature of inhibiting the enzyme that metabolizes amlodipine, CYP3A4, are one such class of drugs. Others include the calcium-channel blocker diltiazem, the antibiotic clarithromycin, and possibly some antifungals. Amlodipine causes several drugs to increase in levels, including cyclosporine, simvastatin, and tacrolimus (the increase in the last one being more likely in people with CYP3A5*3 genetic polymorphisms)."
Harmala alkaloids have more of an effect on CYP2D6 though, so the interaction is likely to be minor except at high dose levels. However, this in no way indicates that the combination would be safe (or dangerous) as it is merely an observation on my part, and I am not a medical practitioner. Lisinopril is not metabolised in this way and is instead entirely excreted via the kidneys due to its solubility in water.
"amlodipine overdose toxicity can result in widening of blood vessels, severe low blood pressure, and fast heart rate.[28] Toxicity is generally managed with fluid replacement[29] monitoring ECG results, vital signs, respiratory system function, glucose levels, kidney function, electrolyte levels, and urine output.
Vasopressors [emphasis added] are also administered when low blood pressure is not alleviated by fluid resuscitation."
If harmala alkaloids led to an amlodipine overdose then they would also potentially complicate treatment with vasopressors. Harmala alkaloids also act as vasodilators (and lisinopril and amlodipine are both vasodilators in some sense) so there would be a risk of postural hypotension. As a worst-case scenario, this suggests to me the possibly fatal combination of unconsciousness and vomiting. This is also mentioned in the thread that you linked to, under "vasodilators". If you decide to proceed with using Syrian rue having a qualified medic as a sitter would be strongly recommended.
One possible ROA to consider is sublingual doses of extracted harmine, starting really low, like 1mg or less. Ideally, get your vitals monitored even while doing this - but equally you would want to stay calm and peaceful.
Above all else, King Tryptamine's advice still stands - speak to your doctor. Indeed, this is
one of the foundations of the Nexus attitude. βThere is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
β Jacques Bergier, quoting Fulcanelli