Method for treating pain or associated condition or symptom

A method for treating pain or a condition or symptom associated therewith in a subject in need thereof, said method comprising administering to said subject a therapeutically effective amount of a compound of the general formula (I):

• or a salt, enantiomer, diastereomer, or mixture thereof,
• wherein
• R1, R2 and R3 are each independently a (C1-C10)alkyl, (C2-C10)alkenyl or (C2-C10) alkynyl, optionally substituted by at least one substituent each independently selected from the group consisting of hydroxy and halogen;
• R4 is a (C1-C10)alkyl, (C2-C10)alkenyl or (C2-C10)alkynyl, substituted by at least one substituent of general formula (II):
• X is selected from the group consisting of N, N+H, N+(C1-C10 alkyl), O+, S+, P, and P+H;
• and
• R5 and R6 are each independently selected from the group consisting of H, (C1-C10) alkyl, (C2-C10)alkenyl, and (C2-C10)alkynyl, or both R4 and R6 together with X may form a (C3-C8)heterocyclic ring, wherein R5 and R6 each independently is optionally interrupted by at least one group each independently selected from the group consisting of —O—, —NH—, N+(C1-C10 alkyl), and —S—.