Hydroquinone is banned in the European Union, Australia and Japan for reasons you can look up on your own.
It is probably safe to use, but you are not suppose to use long term, so why use it while having electrolysis, which can take 9-18 months when any hyperpig problems will naturally resolve on it's own?
Prescription strength hydroquinone (4%) works better than the over the counter stuff (2%). Sun exposure is bad when using hydroquinone.
Continuous use is not good. Cycling on and off is recommended, like 4 weeks on and 4 weeks off? or 8 weeks on and 8 weeks off? Do whatever is recommended by your doctor.
Watch where it is sourced. Some products have mercury in them.
There are more natural products you can choose to use that don't come with so many warnings.
Dee Fahey RN CT LLC
Licensed by the State Medical Board of Ohio for Cosmetic Therapy/Electrolysis and the State Nursing Board of Ohio