I've done a lot of adderall and weed, but i have done ritalin and weed before too. Any CNS stimulant will greatly increase the effect of weed, so ritalin makes it a lot stronger. you don't need much ritalin, even non-recreational doses work. The amount of weed mostly determines how high you get when you mix them, you just need some ritalin in your system for the combination to be effective. Weed can make your heart beat faster and can cause anxiety in large doses, ritalin overdose is cause by your heart beating too fast and can also cause anxiety, so I'd assume it would take less ritalin to kill you with weed than without weed, although i'm not certain. I'd recommend a smaller dose than you'd normally do without weed because it could be more dangerous and because you don't need a large dose to really get the effects of the combo. Take the ritalin before the weed and wait until it kicks in because if you smoke before you'll get higher and higher as the ritalin kicks in and it might be too much to handle. Start yourself off with a small hit too. Also, the combination can be hallucinogenic, but i'm not sure if it can for all people. With ritalin, I've experienced much more of the normal visual changes with weed, like brighter colors and 3-D, and "zooming in". Like I'd be standing there and my vision zooms into a small area and the rest of my vision is cut out. I haven't been really all that high with ritalin and weed though, so you might experience a lot more. With adderall however, I've been really really really high and have experienced seeing rainbow spirals, multi-color tunnels, flashing patterns, flashing designs(example a diamond with ripples in it and an eye in the middle), moving patterns(like a real pattern that doesn't really move that i see moving), pictures moving and changing, colors "bleeding" out of my computer screen(example i was playing a game and a deep blueish-purpleish starting oozing out of the screen, then changed into a bunch of other colors, although i only specifically remember the blueish-purplish and deep red), solid surfaces appearing liquid, sometimes with waves, a full out of body out of reality trip(way too long to explain but i'll put a link to a bluelight post i explained it in), and a lot more. It's fucking awesome. Smoke an Indica strain if you want the hallucinations, Sativa does make you trip but indica's better. I started mixing them around last janruary and mixed them every single time i smoked weed until late june, and now I experience hallucinations on only weed, but they're lessening over time so i think it isn't permanent, and they aren't as strong. It makes weed more fun for me, but I figured i should warn you that weed might not be the same drug after you mix them a lot, and it may or may not stay that way. Also, weed can unmask psychosis and so can ritalin, along with most other CNS stimulants, so mixing them might increase the chance of psychosis being unmasked. Other than psychosis, anxiety, and increased heart beat i don't think there's any danger in mixing them.
Link to OBE trip----->
http://www.bluelight.org/vb/threads...ll-hallucinogenic-experience-powerful-visuals