A nimodipine injection concentrate and diluted formulation comprises nimodipine (base or salt), an effective amount of a hydrophilic surfactant, and a pharmaceutically acceptable carrier for injection which is an aqueous solution, an organic solvent, an oil, or a cyclodextrin, such that the nimodipine is substantially contained in a concentrated injection solution, suspension, emulsion or complex as a micelle or a colloidal particle or an inclusion complex and the formulation is stable and clear. In certain embodiments, the hydrophilic surfactant is polysorbate 80.