A composition including a peptide agent including amino acid sequence LKKTET or LKKTNT, a conservative variant thereof, or a stimulating agent that stimulates production of an LKKTET or LKKTNT peptide, or a conservative variant thereof, the composition including at least one amino acid stabilizing agent or lyophilization bulking agent, the composition being in lyophilized form, or in a form capable of being lyophilized.