Weleda Arnica 30c (125). Weleda Arnica 30C is ideal for active or acute over the counter use. It can be used when there is an emotional and/or a physical element to the condition, such as occasional sleeplessness. 30C remedies should be taken as a short course only, unless prescribed by a practitioner.. Homeopathic medicinal product. May help with Symptomatic relief of muscular pain and stiffness. Suitable for vegetarians. This homeopathic medicinal product may help with Symptomatic relief of muscular pain and stiffness. Vegetarian friendly.