current use of ay nitrate medication or medications that interact with nitroglycerin

patients with a known allergy to nitroglycerin or topical gel ingredients

patients with a history of migraine headaches

patients with unstable medical problems

patients with cognitive or language difficulties

patients with screening lab values more than 20% outside of normal

patients with open lesions at site of application

women of child-bearing potential who are unwilling to comply with contraceptive requirements.

Lab Study of MQX-503 in Treatment of Raynaud's