Combinations - Gabapentin+Tramadol

[Lehendakari]

SWIM has been taking gabapentin when going out and found it fun when combined with alcohol and ritalin.

He's also been taking tramadol in low doses (alone) and found it a great pro-social drug, so he's going to add tram to the equation above anybody knows possible interactions??

I know it's a potential dangerius combo but swim is going to use very low amounts of every drug. He usually does:

t+0: 2000-2400 mg Gabapentin
t+2-3 h: 3-5 drinks
t+5h: 20-40 mg Methylphenidate

He found no problems with this combo and wants to boos it a bit with 150 mg tramadol.