Hi,
Incomplete data like age and gender not mentioned. I can understand your concerns regarding the safety of prescribed medications for a prolonged period.
Nicovit (niacinamide) is a form of vitamin B3 that is used for the treatment of its deficiency as well as in a combination with other medicines or supplements to treat
hyperpigmentation, and blistering of the skin.
Exifol a nutritional supplement which contains various
micronutrient and multivitamins is commonly prescribed to treat the deficiency states and also for certain skin disorders.
Based on your clinical condition, these medications have to be taken as prescribed by your
dermatologist.
I recommend you to use over-the-counter
hydroquinone or azelaic acid or kojic acid containing creams to help in getting rid off 'darken skin'.
I also advise you to:
1. Avoid exposure to sunlight. Use hats, sunglasses, and sunblock with physical blockers.
2. Use 'sun screens' with sun protection factor (SPF) of at least 50 that contains physical blockers, such as
zinc oxide and titanium dioxide
3. Keep yourself well hydrated.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr. Mohammed Taher Ali, General & Family Physician