Robb medicated menthol dusting powder 200 g Robb medicated menthol dusting powder is intended for pleurodesis, arthritic pain, shoulder joint pain, tendon pain, muscle strains or sprains, back pain. back, bruises, cramps, eczema, skin irritations and other conditions. Robb Medicated Mint Dusting Powder may also be used for purposes not listed in this medication guide. Should not be used if you have the following conditions: Allergic reactions. Hypersensitivity. Seizures.