In isolated synaptoneurosomes, Noopept (as well as the endogenous peptide cycloprolylglycine) appear to modulate neuronal membrane potential, causing depolarization but and being able induce hyperpolarization in a calcium-dependent manner (hyperpolarization abolished in calcium-free medium); Noopept was more effective than cycloprolylglycine in this regard but the two were competitive rather than additive.  The researchers noted this effect could be due to blocking calcium channels (noted previously in snail neurons  where 10nM Noopept as well as both Piracetam at 100mM and Vinpocetine at 30mM at inhibiting slow inactivating potassium channels without influencing calcium or fast acting potassium channels  ) and would result in increased excitatory potential of neurons. However, as Noopept is also associated with protection against stroke (a mechanism related to opening potassium channels) a modulatory effect was proposed. 
Other supplements that promote bone healing include calcium and magnesium supplements (ideally, a magnesium chelate supplement). Other things that can help are a fish oil supplement and a green superfood powder. Fish oil benefits your health and bones because the omega-3 fatty acids present can reduce inflammation and speed the healing process. Getting a green superfood that has beneficial spirulina and chlorella — along with other alkalizing fruits and vegetables — is very beneficial at healing broken bones as well.