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Posts Tagged ‘Kineret’

As noted in another post, I seem to have a refractory case of rheumatoid arthritis and have even been labeled as such by my rheumatologist. I’ve been on 16 different RA medications (see list bel0w) since being diagnosed in early 2009 (see https://rheumatoidarthritis.net/living/already-shot/). Some of these medications were taken in combination with one another. For example, methotrexate and Humira. All of these medications failed for a variety of reasons.

The latest drug on the heap of failed drugs is Kineret. I started injections starting Feb 7 after finally getting over a thrush infection which required two different anti-fungals to control. Within a day I started getting migraines and nausea. The migraines were present every day and increased in intensity to the point where I ended up taking migraine abortive medicines multiple times to knock them down. This happened after only having two significant migraine episodes the entire month of January. The nausea was primarily in the lower abdomen, got bad the second day, and increased to the point where it was waking me up in the middle of the night. I was not able to function well during the day. One evening I experienced sharp pains in the lower abdomen and also had some diarrhea periodically . Upon waking one morning, I just couldn’t stomach (pun intended) the thought of injecting Kineret and dealing with the migraines and nausea anymore. I contacted my rheumatologist and asked what to do. She stated, “I agree with stopping Kineret – thanks for trying. Let me chat with my partners to see what they think. There are several new drugs out for psoriatic arthritis that may have early data for RA too.

It’s hard to fathom untreated RA as the impact can be debilitating and disabling so treatment is needed. As my rheumatologist mentioned at the last appointment and in the recent message, it may be time to try something experimental and off label which would require insurance approval. Perhaps it’s time to investigate clinical trials as there are a host of drugs being tested for RA.

Rheumatoid Arthritis Drug  Duration  Reason for Stoping
Sulphasalazine oral

1 week

Allergic reaction – hives

Methotrexate oral and self-injection

2 years

Triggered migraines

Enbrel self-injection

5 months

Lack of efficacy

Meloxicam (Mobic) oral

3 weeks

Gastritis

Salsalate oral

3 weeks

Gastritis

Cimzia self-injection

5 months

Lack of efficacy

Humira self-injection

1.5 years

Reduced efficacy over time

Orencia infusion

1 year

Reduced efficacy over time

Imuran (azathioprine) oral

5 months

Gastric pain, nausea

Leflunomide (Arava) oral

5 months

Gastric pain, nausea, diarrhea

Actemra (tocilizumab) infusion

5 months

Raised cholesterol and triglycerides

Remicade (Infliximab) infusion

6 months

Triggered migraines

CellCept oral

6 months

Gastric pain, nausea

Rituxan (Rituxamab) infusion

2.5 years

Reduced efficacy over time, recurrent and serious infections

Xeljanz oral

3 months

Triggered migraines, gastric pain

Kineret (Anakinra) self- injection

1 week

Triggered migraines, nausea, diarrhea

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My rheumatologist reiterated with me yesterday that I have a tough to treat case of RA – called refractory RA. She displayed disappointment that all of the treatment plans we’ve tried over the years have not had the intended impact. We’ve cycled through four TNF inhibitors (Enbrel, Cimzia, Humira, and Remicade), Orencia, and Actemra. And that’s in addition to various DMARDs including sulphasalzine, azathioprine, and leflunomide (Arava). The reasons for stopping the use of these drugs runs the gamut of lack of efficacy to intolerable side effects. My doctor was apologetic, felt bad I wasn’t helped by all of the treatment plans, and genuinely expressed concern for the impact RA has had on my life recently. But I reassured her that I trusted her medical judgement and that the impact comes over time allowing time to adjust. I appreciated her empathy and deep desire to help.

We discussed the few remaining options which includes Xeljanz, Kineret, and Rituxan. Xeljanz (tofacitinib) was approved in the United States but not approved in Europe. We both felt that more data was needed on this “oral biologic” before giving it a try. Kineret, or anakinra is a biological response modifier that targets interleukin 1. My rheumy said that is not used that much anymore because of more effective options. A recently published report indicates that a Swedish company just purchased the rights for Kineret from biological pharmaceutical giant Amgen. Such a move seems like Amgen is dumping the drug likely because it is not profitable and is moving onto other new drugs. After much discussion, we both agreed to try Rituxan and I will continue to inject 20mg of methotrexate weekly. 

As I was describing my new treatment regimen to friends and family, I found myself trying to explain the drugs, how they are administered, how they act to treat RA, and the possible side effects. As I read more about these drugs, it struck me as interesting that both medicines were originally developed to treat certain forms of cancer. Methotrexate is a chemotherapy drug developed in the 1950s and is still used to treat forms of leukemia, breast cancer, lung cancer, non-Hodgkin lymphoma, and head and neck cancers (see American Cancer Society). It stops the growth of cancer cells by affecting their metabolism. Given the immunosuppressing nature of methotrexate, it is now commonly used in lower doses to treat various autoimmune diseases including rheumatoid arthritis. It’s also used to treat tubal ectopic pregnancies by inducing abortion. In spite of the low doses used in treating RA, some of the chemotherapy side effects remain including hair loss and nausea. This paints a picture of a rather toxic medicine! But I’ve been injecting 20mg weekly for some time now and seem to tolerate it rather well.

Rituxan is also known by the names MabThera and Rituxamab. This monoclonal antibody is a biological medicine that was originally developed in the late 1990s to target the protein CD20 present in certain phases of B lymphocytes. It was originally approved for the treatment of B cell related lymphomas and leukemias (see the Rituxan website). In the early 2000s, it was shown in clinical trials to be effective in treating rheumatoid arthritis and gained FDA approval for use in refractory RA cases in 2006. The involvement of B cells in autoimmune diseases likely led to the investigation of Rituxan as a treatment for RA. The side effect profile appears similar to other biologicals but with some additional infusion side effects requiring some pre-medications along with a few more rare serious infections.

The use of cancer drugs to treat RA points to the connection of both diseases to the immune system. It also demonstrates the serious nature of RA. Given the fact that both methotrexate and Rituxan were originally designed to treat certain cancers, and that they are now secondarily being used to treat RA, may point to the fact that a much larger proportion of research funding goes to cancer (see this earlier post). While I don’t mind receiving the “leftovers” or being an “afterthought” if the medicines effectively treat RA, the ideal would be for the development of new treatments or even cures specifically designed for the processes involved in autoimmune diseases. In the meantime, I’ll go to the infusion clinic and begin Rituxan infusions along with cancer patients and see if it can take care of this refractory case of RA!

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