I have gone through your case and I can understand your concern. Both brands that produce Hydroxychloroquine, have the same inactive ingredient (full name of drug is Hydroxychloroquine sulphate), so sulphate is inactive ingredient. Your problem is related to side effects from longterm use, while using hydroxychloroquine, you may need frequent blood tests. Some people taking this medication over long periods of time or at high doses have developed irreversible damage to the retina of the eye. Stop taking hydroxychloroquine and call your doctor at once if you have trouble focusing, if you see light streaks or flashes in your vision, or if you notice any swelling or color changes in your eyes. Please don t forget to give your valuable feedback and five star rating, to help me assist you in a better way. Click at I Find This Answer Helpful too . Please, write a review about your experience with me.