Need a Quick Answer: Do Amp+Mph really counteract each other

[StonedCold]

I've read on multiple occasions that amp-based stims and mph-based stims dont work well together. Does anyone know definitively if this is true?

Since this morning i've had:
10mg Adderall sublingual
5mg Adderall sublingual
10mg Adderall Sublingal
30mg Vyvanse down the hatch, with a cap of baking soda for pH

Can i tack on some MPH, or is it a waste?

Thanks Bros!

 

[amapola]

Does mph stand for miles per hour or what?

methamphetamine
mephedrone
methylphenidate

etc.

I'm also going to move this to BDD for you.

 

[NeighborhoodThreat]

If you're talking about methylphenidate (which you may not be), then they won't counter-act each other, they will synergize with each other and produce a much more pronounced, strong and potentially dangerous effect.

Please tell us which drug you mean by "MPH"...

Edit:

What experience do you have with stimulants/do you have any tolerance to amphetamines or methylphenidate?