Piracetam doesn't increase BDNF and NGF at all. It's a positive allosteric modulator of the AMPA receptor. The same is true of Aniracetam, Phenylpiracetam, Pramiracetam. Most of their stimulation comes from an increase in dopaminergic sensitization (especially with Aniracetam, it seems to be the most potent traditional racetam when it comes to dopamine).
Noopept/Oberacetam, on the other hand, has all the same effects, benefits and mechanisms of action as the standard racetams, such as being a modulator for AMPA, , but what sets it apart from other cognitive enhancers is that it *also* acts on BDNF production, NGF production, serotonin/dopamine modulation (not just increased sensitization of the D2 receptors, but secretion as well). It also seems to have a larger effect on glutamate than the older racetams.
This is why Noopept achieved better results in cognitive disorders in the Soviet studies when compared to the older smart drugs. Noopept's benefits seem to last beyond cessation as well. The other racetams have more transient effects for mental cognition.
I think it'd be better to use Noopept with Lenire, since increased neurogenesis and synaptic generation are its forte. The only effects of Noopept that don't last beyond cessation is the AMPA modulation and dopamine/serotonin sensitization (basically what the other racetams do).
My current dosage for Noopept is 10mg twice a day. Piracetam is much weaker than Noopept, so the dose is 2-3 grams twice a day, instead of 10-30mg to achieve comparable effects.