Potassium dichromate is one of the most common culprits in causing chromium dermatitis. Chromium is highly likely to induce sensitization leading to dermatitis, especially of the hand and fore-arms, which is chronic and difficult to treat. As with other CrVI products, potassium dichromate is carcinogenic and should be handled with gloves and appropriate health and safety protection. However, Potassium dichromate is one of the key ingredients in the migraine over-the-counter medication called Headon.

Head On Migraine Active Ingredients

Ingredient 1: Blue Iris. Poisonous. Causes skin irritation

Ingredient 2: Potassium Dichromate. Poisonous. Causes Chromium Dermatitis.

Ingredient 3: White Bryony. Strange herb.

Not listed but actually effective ingredient 4: Menthol

Entrez Pubmed lists not a single article on any of these with keywords 'migraine' or 'headache.' So, no actual science behind this stuff.