Undergo glutathione therapy.... Otherwise, few creams also available.. contact me by direct online consultation for treatment.

Hi : Thanks for your query. Physical protection is by far the cheapest and best way to prevent and reverse darkening. It can be in the form of cap, umbrella, etc. along with that chemical protection in the form of a good SPF sunscreen is also important. Chemical peeling helps to exfoliate skin thus removing darkening  and helps in lightening and brightening the skin. A series of chemical peels are generally required which helps you achieve your colour.

Depending on the medicines you used they can be rthe of cause darkening of your skin.. But there can be many other causes..start using a good medicated sunscreen and moisturisers. Also take foods rich in vitamin c