Piracetam

Piracetam may facilitate the deformability of erythrocytes in capillary which is useful for cardiovascular disease.
Potential for vertigo, dyslexia, Raynaud's phenomenon and sickle cell anemia.
Symptoms including anxiety, insomnia, irritability, headache, agitation, tremor, and hyperkinesia are occasionally reported. Other reported side effects include somnolence, weight gain, clinical depression, weakness, increased libido, and hypersexuality.
PAM of the AMPA receptor
GABA brain metabolism and GABA receptors are not affected
Increases the action of the neurotransmitter acetylcholine via muscarinic cholinergic (ACh) receptors
Inhibits N-type calcium channels