Yes, they are related. The -pine drugs, strange as it may sound, all contain a benzodiazepine structure (or a derivative of the benzodiazepine structure). That's where the "-pine" comes from. They don't act like benzodiazepines in the sense that they aren't addictive, but they are chemically similar. Zyprexa (olanzapine) is a thienobenzodiazepine, Seroquel (quetiapine) is a dibenzothiazepine, and Clozaril is a dibenzodiazepine. They tend to be more sedating and cause more weight gain than the other atypicals in the population as a whole, though personally my experience was that they caused the least weight gain and Abilify caused the most, so I think in some sense you have to take the side effects with a grain of salt because they're so variable from person to person. Anyway, this is off topic, but hopefully it answers your question