The invention relates to, for example, a respirable dry powder that contains respirable dry particles that contains a tiotropium salt, one or more amino acids, sodium chloride, and optionally one or more additional therapeutic agents, where the tiotropium salt is about 0.01% to about 0.5%, the one or more amino acids is about 5% to about 40%, the sodium chloride is about 50% to about 90%, and the optional one or more additional therapeutic agents are up to about 30%, where all percentages are weight percentages on a dry basis and all the components of the respirable dry particles amount to 100%, and wherein the majority of the one or more amino acids are present in a crystalline state.
