I'm thinking about trying a 48 hour sleep cycle. Would this cause any adverse side effects? How would this affect my productivity along the 32 hours?

I tried this the day before yesterday. I was sleepy for the ~7 hours I would usually sleep, then the sleepiness went away, like I had slept the night before. I felt sleepy again when it was near the time I would usually sleep. I stayed up for the full 32 hours and slept for 13 hours and I'm not tired, or lazy today. What changes will I see if I continue doing this?

I'm asking this here because I know our body has internal clocks and what not, but I also know that it's fairly adaptive. Suffice it to say I'm a midwit when it comes to biology. Serious replies please.