A thickened composition that does not lose viscosity even in the presence of an organic acid. A thickened composition, including a polyhydric alcohol, water, an organic acid, and a lipid peptide-type compound containing at least one of a compound of Formula (1) to Formula (3) below and a pharmaceutically usable salt of compound of Formula (1) to Formula (3),where R1 is a C9-23 aliphatic group, R2 is a hydrogen atom or a C1-4 alkyl group that optionally has a C1-2 branched chain, R3 is a —(CH2)n—X group, n is a number of 1 to 4, X is an amino group, guanidino group, —CONH2 group, a 5-membered ring group optionally containing 1 to 3 nitrogen atom(s), a 6-membered ring group optionally containing 1 to 3 nitrogen atom(s), or a condensed heterocycle group that contains a 5-membered ring and a 6-membered ring optionally containing 1 to 3 nitrogen atom(s).
