Talk to Neuro Physician on Neuro Psych

AoA I Hope all Drs. will be well. My question is that i am using the psych med from very long time 2008. But now on Zylex SR 300mg, Dowvigil 400 mg. My psych dr. was told me you can take zylex sr at once here i read on every forum of med DO NOT TAKE WELLBUTRIN SR 300 mg AT ONCE MINIMUM 8 HOURS GAP IS MUST. So my Dr. is right to give me this advice you can take at once? 2nd question is that i am also on Dowvigil 400 mg again read this on all this is the highest dose but i am using and don't give any major side effect till now can i continue it because on others dose ranges increased like the rapid days just to wanted it to increase on 400 mg and satisfy on this dose from 6 months and never wanted to increase it but also don't stop Modafinil more than 2 days. Your suggestion advice will be greatly appreciated doctors. Thanks.