Nardil was a wonder drug for me, the only that ever worked, but the side effects were a nightmare. I really want to recapture that effects somehow without the side effects.
ok ..
The side effects, indeed extensive, tend to get a little easier after a long time, from the anecdotes I've read.
I think that Nardil's antidepressant efficacy has a lot to do with:
1) metabolism into phenethylamine (whose metabolism by MAO-B is interrupted)
2) actions at GABA transaminase
and (purely my personal supposition) 3) some weird roundabout NMDA antagonism. Anyway, these actions I think are why, after reaching 1mg/kg, lowering to a "maintenance dose" for MAO inhibition, does NOT work for most people. They also betoken additional problems with combining the MAOIs as you've suggested ... besides that it's quite dangerous (both selegiline and parnate have an adrenergic effect independent of MAO inhibition) and dose control goes out the window, you'll also be trading out some of Nardil's special properties.
The guy* who I talked to who eventually had a lot of success** with a combination of Nardil and dextroamphetamine*** shared the rough side effects that it seems everyone who is prescribed Nardil has to suffer through. For weight gain, which he suspected to be largely water retention, I think he used a low dose of hydrochlorothiazide. For insomnia (this got better after a year) he needed a GABAergic sleep aid, like zopiclone. For some drowsiness/thinking problems (also got better), he suspected central anticholinergic activity, and the symptoms responded quite well to galantamine.
* (his tag on another forum was Chairman MAO, if anyone here knows of him, really brilliant fella)
** (last I checked he's still doing great, his anhedonic depression, ADD, & social phobia, which ruined his life for years, now in remission)
***(60mg/day split into 4 doses, this dose was, with the help of his doctor, extremely carefully titrated upwards from 0 at like 1.25 mg at a time, nifedipine on hand at all times if things got nasty.)