First, let me welcome you to our family here. I am glad that you found us and that you decided to join.
One of the most common features of lupus is the mouth/throat ulcers. This often occurs when the disease is active and sometimes is accompanied by increased joint pains, rashes and hair loss. Like you, I suffered greatly from the mouth ulcers and, also like you, I was unable to eat as it was torture!! I also had the ulcers on my hands, feet, and my scalp.
Plaquenil was the drug that worked for me. However, you need to know that Plaquenil is a cumulative drug. This means that it must build up in your body before you can see significant results. So, it can take weeks to months before you really notice it working. But, for me, once the Plaquenil started working, the ulcers began to heal quickly and they never came back.
This issue is how to deal with them while you are waiting for the Plaquenil to work. Unfortunately, there are not a lot of remedies that work because the ulcers are systemic, not topical. What most doctors recommend is antiseptic mouthwashes and sometimes steroid lozenges or paste.
1) Some people say that rinsing their mouth with hydrogen peroxide helps.
2) I've also heard that the following helps: EQUAL PARTS CHILDRENS BENEDRYL AND MILK OF MAGNESIA. SWISH AND SWALLOW. JUST USE THE LITTLE CUP THAT COMES WITH ONE OF THEM. FILL WITH EQUAL PARTS OF EACH. DO THIS A COUPLE TIMES A DAY.
3) Also, 3 parts benedryl, milk of magnisia and lidocan
I cannot attest to any of these as I've never tried them myself. Perhaps someone else will be along with more helpful information for you. In the meantime, keep taking the Plaquenil as it is one of the best treatments for the oral ulcers.
Peace and Blessings
Look For The Good and Praise It!