Moclobemide and hayfever, any advice?

I have been suffering from depression since childhood, and tried every single SSRI, SNRI etc and nothing worked until I read about MAOI Moclobemide, which has literally saved my life. Unfortunately I also have a pollen allergy/hayfever which without prescribed pills and nasal spray (the otc stuff never worked) is actually pretty disabilitating, consisting of almost constant sneezing and coughing. The allergy always kicks in early in the year (which has always confused me in regards to what I am actually allergic to) but has always been fine when I take cetirizine and mometasone furoate nasal spray. Moclobemide seems to have a crazy amount of bad interactions with other meds, antihistamines being one of them, but little to no available information about these interactions. I've just started on the allergy meds and the combination has destroyed me in terms of drowsiness, and I don't know if it's a coincidence, but also mood-wise. Bizarrely, I've had two days of pure rage in my head, but been so drowsy i can barely sit upright.

Does anyone know of any allergy drugs that work with moclobemide? Is it also possible that the drowsiness might dissipate if I persevere with this combination? My GP is utterly useless in advising me, as is my psych. It feels like the options are either to have what is essentially a constant heavy cold, but not feel depressed and suicidal, or vice versa, neither of which is acceptable. 

Thank you in advance for any help or advice anyone can provide

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