I have been dying my beard using Just for Men

Patient: I have been dying my beard using Just for Men for several years. Last year, I developed a PPD allergy. Since then, I have tried PPD free alternatives, but the results have been mixed. I have read that Benadryl alleviates the effects of a PPD allergy. If I were to take Benadryl directly before using Just for Men, would that stop the allergic reaction from happening? Alternatively, are there any prescriptions available to combat a PPD allergy?

Doctor: