Looks like 4mg a day is closer to the optimum dose for someone your age. At least according to
this website. See dosage chart below
selegiline dosage chart by age.JPG 49.24KB
112 downloadsI did a trial of selegiline at 5-10mg a day for a couple months or so at the beginning of 2011. Didn't notice much anti-depressant effect, which was slightly disappointing since I suffer from mild depression. Orally (swallowed), it works solely through MAO-B inhibition in doses up to 10mg a day and at about 15mg + starts being non-selective and begins to inhibit MAO-A as well.
When used for depression the dose is built up slowly and ends up at around 30-40mg a day (you'll want to cross reference this dose, I could be off a bit), at which point it is a non-selective MAO-I, the kind of antidepressant that has food interactions and can throw you into serotonin syndrome if you aren't careful. Definitely don't take those kinds of dosages without Dr. supervision.
It does metabolize into Levo-amphetamine and levo-methamphetamine which are not the same (not as stimulating and different effects... levo-methamphetamine is the active ingredient in vicks inhalers for treating nasal congestion) as the illegal d-enantiomers of the same molecules. This may have something to do with the central stimulating properties of selegiline use, separate from the MAO-B inhibition.
Usually selegiline is touted as an anti-aging supplement at the dosage you're taking it. It allegedly protects the brain from oxidation and helps prevent Parkinson's disease. The recommended anti-aging dose starts very low for someone around 30 years old, and increases with age.
Although it wasn't really effective for my depression it did increase libido and also intensified the effects of caffeine very significantly. Made energy drinks feel almost like cocaine or something.
I'm not familiar with the sublingual dosages and how they correspond with oral doses, but sounds like 2 - 4mg per day should be right around your recommended dose.
I think your approach is a good one. Personally I always have trouble sticking with a steady plan when supplementing. I'm too impulsive and end up stepping up to the maximum recommended dose within a few days.
The added energy boost and increased libido may be all you need to pull yourself out of this slump. Hope it works out for you and hopefully the increase to 4mg per day does it.
Personally I've finally gotten relief from my depression with the help of Stablon (tianeptine sodium). I've been taking it 12.5mg TID for about 8 months now and am quite happy with the results. The adjustment period to the Stablon was not the easiest transition I've gone through but worth it in the end.
Again good luck, hope you're back to your normal self soon.