What is Revlimid?
Revlimid® (also called lenalidomide) is an oral cancer drug that is used for the treatment of multiple myeloma. It is part of a class of drugs called Immunomodulatory drugs or IMiDs®. IMiDs work against cancer cells partly by impacting the functioning of the immune system.
Revlimid is chemically related to Thalomid® (thalidomide, Celgene), another IMiD, but has been found to be more potent in the laboratory and has different side effects. For example, significant sleepiness, constipation and painful nerve problems (neuropathy), common side effects of Thalomid, are seen much less frequently with Revlimid.
In addition to multiple myeloma, Revlimid is also used to treat other diseases (myelodysplastic syndrome or MDS, and mantle cell lymphoma).
Revlimid is made by the Celgene Corporation.
How is Revlimid used in multiple myeloma?
Revlimid is used throughout all stages of multiple myeloma.
The combination of Revlimid® (lenalidomide, Celgene) and dexamethasone, also called Revlimid-dex, is approved by the FDA for the treatment of patients with multiple myeloma. Revlimid-dex has been shown to be effective in both newly diagnosed myeloma and in disease that has relapsed or become refractory to current therapies.
Revlimid has also been shown to extend remission and survival time when used as maintenance therapy following high-dose chemotherapy and stem cell transplantation.
Further, Revlimid is also being studied in combination with other myeloma drugs as well as other new drugs in development.
What types of patients can benefit from Revlimid-dex?
Revlimid-dex has been shown to be effective in a wide range of patients including:
How does Revlimid work?
Revlimid works in multiple ways to slow or kill myeloma cells, although the exact way in which it works is not completely understood. It directly affects the tumor cells. It is also known to affect the blood vessels and other substances surrounding a tumor (known as the tumor microenvironment) which help to feed the cancer cell’s growth. Recently it has been shown in studies the Multiple Myeloma Research Consortium (MMRC) helped to fund that Revlimid and other IMiDs bind a protein in myeloma cells called cereblon. This binding triggers myeloma cell death. In some studies higher levels of cereblon are associated with better outcomes after treatment.
How long is Revlimid administered?
Revlimid® (lenalidomide, Celgene) is administered orally. Revlimid is a capsule that is taken every day for 3 weeks with a 1 week rest period. Each 4 weeks of therapy is known a treatment cycle. There are several available Revlimid doses (2.5 mg, 5 mg, 10 mg, 15 mg, 20 mg, and 25 mg capsules). The typical starting dose is 25 mg once a day. The minimum dose is 2.5 mg daily.
Revlimid is taken along with a pill called dexamethasone. The dose of dexamethasone is usually 40 mg and may be given in two different ways — on a high-dose schedule or on a low-dose schedule.
The initial studies with Revlimid-dex used dexamethasone in a high-dose schedule (considered to be the “standard” dose). However, more recent studies have shown that the combination of Revlimid and low-dose dexamethasone in newly diagnosed or untreated patients significantly improves survival with fewer side effects as compared with Revlimid and high-dose dexamethasone. Therefore, low-dose dexamethasone has increasingly become the standard approach.
Your doctor will recommend the right dose for you.
High-dose dexamethasone is typically taken only on certain days of the month, at a starting dose of 40 mg. For the first four months, it is taken on days 1-4, 9-12, and 17-20 of each month. Starting at month 5, dexamethasone is only taken on days 1-4 of each month.
In addition, a blood thinner such as aspirin is typically taken along with Revlimid-dex to reduce the chance of developing a blood clot.
How long is the treatment with Revlimid-dex?
The length of treatment with Revlimid-dex is determined on an individual basis and may depend on a number of factors including:
Patients who expect to proceed to high-dose chemotherapy and stem cell transplant may only receive a few cycles of Revlimid-dex, until they achieve a response. In this case, patients will also have their stem cells collected (harvested) within the first 4 cycles of treatment. Other patients may continue to receive Revlimid-dex indefinitely, as long as the treatment is working and side effects are manageable. You and your doctor will discuss the length of treatment that is right for you.
What are Revlimid side effects?
Revlimid® (lenalidomide, Celgene) can have a variety of side effects depending on the patient’s health history as well as the stage of their multiple myeloma. Most side effects of Revlimid-dex can be managed.
The most common side effects of Revlimid-dex seen in large clinical studies are:
The most common severe side effects of Revlimid-dex seen in large clinical studies are:
Due to the possibility of low blood counts, patients taking Revlimid-dex will have their blood counts checked weekly during the first 2 cycles, every other week during cycle 3, and monthly afterward.
Because Revlimid-dex can increase the risk of blood clots in the legs and lungs, patients taking Revlimid-dex also receive a blood thinner (anticoagulant) such as aspirin or heparin. The choice of agent will be tailored to the patient based on their individual risk factors.
Other serious side effects that have been seen with Revlimid-dex include heart attack and stroke, liver failure, and allergic reactions, including severe skin reactions.
Women who are pregnant or who plan to become pregnant must not take Revlimid. This precaution is due to its similarity to Thalomid® (thalidomide, Celgene), and some signs of birth defects in animals. A program called RevlimidREMSTM has been created to prevent exposure to Revlimid during pregnancy. Patients must register and meet all the conditions of the program in order to take Revlimid.
How are side effects of Revlimid-dex managed?
Management of side effects depends on the type and severity of the problem. Some side effects such as mild or moderate diarrhea can be managed with additional medications.
More serious side effects may require you to stop Revlimid-dex either temporarily or permanently. In many cases, Revlimid-dex is stopped temporarily, until the side effect improves, and then re-started at a lower dose. Studies have shown that Revlimid-dex is still effective at lower doses.
Does Revlimid cause second cancers?
There have been reports of new second cancers (also called second primary malignancies or SPMs) developing in a small number of myeloma patients who received Revlimid therapy in clinical studies. In all of these studies Revlimid was used in combination with melphalan chemotherapy. The types of second cancers seen include MDS (myelodysplastic syndrome, a form of preleukemia) and AML (acute myelogenous leukemia). There have been very few additional second cancers in other studies with Revlimid where melphalan was not part of the treatment. Overall, the information available to date indicates that therapy with Revlimid significantly decreases the risk of myeloma disease progression. Hence, some doctors believe that the benefits of Revlimid therapy may outweigh any potential risk of second cancers.
What have Revlimid clinical studies shown?
Revlimid® (lenalidomide, Celgene) clinical studies have shown improved survival in patients with newly diagnosed/untreated myeloma.
Is Revlimid-dex effective in previously untreated myeloma?
The combination of Revlimid and dexamethasone is an effective therapy for patients with myeloma, including those who are eligible for stem cell transplant and those who are not. One study showed that Revlimid plus high-dose dex was more effective than high-dose dex alone.[Zonder Blood 2007 abstract] Another important study showed that patients taking Revlimid plus low-dose dex had significantly improved survival and fewer side effects than patients taking Revlimid plus high-dose dex [Rajkumar Lancet Oncol 2010].
The FDA approval for use of Revlimid in newly diagnosed myeloma was based on the results of the large Phase III FIRST™ Trial. This study compared 3 different treatments in myeloma patients who were not candidates for stem cell transplant: continuous Revlimid-low-dose dex until disease progression, a fixed course of Revlimid-low-dose dex (18 cycles), and the combination of melphalan, prednisone, and thalidomide [Benboubker NEJM 2014].
Is Revlimid-Velcade-dex effective in previously untreated myeloma?
Revlimid is thought to make myeloma cells more sensitive to Velcade® (bortezomib, Takeda Oncology) and dexamethasone. The combination of Revlimid, Velcade, and dexamethasone (RVD or VRD) has been shown to be very effective as frontline therapy, with unprecedented activity seen, even in patients with high-risk features. In some cases, a lower dose of dexamethasone is used and the combination is referred to as VRd or RVd.
RVD is included in myeloma treatment guidelines as one of several preferred options for initial therapy for transplant candidates, and is one of the most commonly used regimens in transplant candidates in the United States. RVD is also one of several preferred options for treating myeloma in patients who are not transplant candidates.
What other Revlimid combination therapies are effective in previously untreated myeloma?
Revlimid-low-dose dexamethasone (Rd) is being evaluated in Phase III studies in combination with a variety of newer agents for treatment of patients with newly diagnosed myeloma.
Is Revlimid effective as maintenance therapy following high dose chemotherapy and stem cell transplantation?
Two large studies have shown that patients who received Revlimid as maintenance therapy following high-dose chemotherapy and stem cell transplantation have a significantly longer remission time compared with those who did not receive any maintenance treatment. Revlimid maintenance therapy was taken at a dose of 10-15 mg/day in these studies—which is lower than the typical dose of 25 mg/day.
One study, conducted in the United States, showed that maintenance therapy with Revlimid significantly prolonged the time until disease progression. In addition, the overall survival rate was higher for patients who received Revlimid. This is the first study to show a survival benefit with Revlimid maintenance therapy.
The other study, conducted in France, showed that in patients who received Revlimid as maintenance therapy, there were fewer patients who had progression of their myeloma after 3 years of follow-up. However, in this study there has been no improvement in the overall survival among those receiving Revlimid.
There was a small increase in second new cancers in these studies, which did not affect the overall benefit of Revlimid on disease progression. Thus, some researchers believe that the benefits of maintenance therapy with Revlimid may outweigh the risks of a second new cancer.
Patients who have undergone a stem cell transplant should discuss with their doctors the pros and cons of maintenance therapy with Revlimid.
Is Revlimid-dex effective in treating relapsed or refractory myeloma?
Two large clinical trials showed that Revlimid-high-dose-dex is significantly more effective than high-dose dexamethasone in treating relapsed or refractory myeloma. Over 700 patients throughout the world participated in these studies.
Revlimid-dex significantly delayed disease progression and extended survival. Response rates were superior with Revlimid-dex as well:
Is Revlimid-Velcade-dex effective in treating relapsed or refractory myeloma?
Results from a multicenter Phase II trial show that the combination of Revlimid, Velcade, and dexamethasone is very effective as a treatment for relapsed or refractory myeloma. As a result, RVD is often used in this setting and is listed as one of several preferred options for treatment of relapsed or refractory myeloma in current treatment guidelines.
What Revlimid combination therapies are effective in relapsed and/or refractory myeloma?
Revlimid is commonly used as part of combination therapy for the treatment of relapsed and/or refractory myeloma. Recent clinical trials have shown that, as with RVD, adding a third agent to Revlimid-dex improves outcomes over that seen with Revlimid-dex alone.
Three myeloma drugs have been evaluated in combination with Revlimid-low-dose dexamethasone (Rd) in Phase III clinical trials in patients who had received one to three prior therapies. Results of these studies supported the approval of these drugs for use in the treatment of myeloma and they are listed as preferred regimens in myeloma treatment guidelines.
How is Revlimid currently being studied in myeloma?
Revlimid is being evaluated in a number of ongoing clinical trials in newly diagnosed and relapsed and/or refractory myeloma, as well as in patients with asymptomatic high-risk smoldering multiple myeloma to see if it can delay progression to active myeloma.
For example, Revlimid-low-dose dex is being tested in Phase III trials in newly diagnosed myeloma in combination with a variety of agents, including:
The combination of Revlimid, Velcade, and low-dose dex (RVd) is being evaluated alone and in combination with high-dose chemotherapy and autologous stem cell transplant in a Phase III trial in newly diagnosed myeloma. Results from this trial will help determine if transplant is still necessary in the initial management of myeloma in younger patients or whether novel agents alone provide similar outcomes.