Perhaps you or someone you know has been prescribed a medicine called 'Siltuximab' (brand name: Sylvant). Hearing this name may sound a little strange, because this is not a medicine we hear every day and buy from the pharmacy. So, don't be afraid. Today, we will talk about this special treatment called Siltuximab, the condition it treats, and the things you need to be careful about when taking this treatment.
Simply put, what is Siltuximab?
Imagine that our body has an immune system. This is what fights disease-causing germs and viruses. This system has special soldier-like parts, which we call ' antibodies '. Siltuximab is like that, but it is a very special type of artificial antibody made in a laboratory. To be precise, it is a 'monoclonal antibody ' . Its job is to find a specific protein that helps to cause certain diseases in the body, target it, and stop it from working.
This drug is mainly used to treat a rare condition called multicentric Castleman disease (MCD) . This is a condition in which cells in our lymph nodes grow out of control. Siltuximab works by controlling a protein that causes this unwanted cell growth, thereby controlling the disease.
Things you need to tell your doctor before starting treatment
It is important that your medical team is fully aware of your health status to determine if this treatment is right for you. Therefore, if you have any of the conditions listed below, be sure to tell your doctor about them without hiding them.
| Situation you need to report | Description |
|---|---|
| Current infections | If you have HIV or AIDS, or if you currently have any other type of infection (fever, cough, cold), including viral infections such as chickenpox or herpes. |
| Vaccinations | If you have recently received a vaccine or are scheduled to receive one soon. |
| Stomach or intestinal problems | If you have stomach inflammation, gastritis, or other related problems. |
| Allergies | If you are allergic to siltuximab or any other medicine, food, or dye. |
| Pregnancy and breastfeeding | If you are pregnant, trying to get pregnant, or breastfeeding. |
How do you get this medicine?
This is not a pill or syrup that you can take home. Siltuximab is an infusion that is given into the body through a vein. Simply put, it is like saline. It is given only in a hospital or clinic, under the close supervision of a trained medical professional .
Important: If you think you have taken more of this medicine than the doctor prescribed, inform the hospital staff immediately. In case of an emergency, go directly to the Emergency Treatment Unit (ETU) . You can also call the National Poisons Information Centre at the Colombo National Hospital for further information.
What if treatment is missed?
If you miss your scheduled dose, call your doctor immediately . He or she will decide when you should get your next dose. Getting your dose on time is important for the success of your treatment.
Other medications that may interact with siltuximab
Siltuximab may interact with other medications you are taking. This is called a 'drug interaction'. Therefore, you should tell your doctor about all the medications you are taking (including those prescribed by other doctors, over-the-counter medications, vitamins, traditional medicines, and even Ayurvedic medicines) .
Some of the main types of medications that can cause problems are:
- `atorvastatin`, `lovastatin` (cholesterol-lowering drugs)
- Birth control pills
- `cyclosporine` (an immune-suppressing drug)
- Live virus vaccines
- `theophylline` (a medicine used for respiratory diseases such as asthma )
- `warfarin` (a medicine that prevents blood clotting )
Remember, this list is not complete. The safest thing to do is to tell your doctor about everything you take.
Things you should be aware of during treatment
Protect yourself from infections
This medicine slightly reduces your body's ability to fight disease (immunity). This makes you more likely to get infections .
- If you develop symptoms such as fever, cold, sore throat, or cough, do not self-medicate and tell your doctor immediately .
- Minimize going to crowded places and coming close to sick people as much as possible.
Pregnancy and birth control
This is a very important matter.
- Birth control pills may be less effective while taking siltuximab. Therefore, talk to your doctor about using an additional form of birth control, such as condoms.
- You should completely avoid getting pregnant while taking this medicine and for 3 months after the last dose , as it can cause serious harm to the unborn baby.
- If you are expecting to become pregnant or have even the slightest suspicion that you are pregnant, tell your doctor immediately.
Breastfeeding
Do not breastfeed your baby while taking this medicine and for 3 months after the last dose.
Medical tests
During treatment, your doctor will often order blood tests to monitor your condition. It is essential to have these tests done on time and without skipping them to ensure the success of your treatment.
Side effects of the medicine
Like any medicine, Siltuximab can cause side effects in some people. Most of these are not serious, but there are some things you should be especially careful about.
| Side effect | Description |
|---|---|
| Symptoms that should be reported to your doctor or hospital staff immediately | |
| Allergic Reactions | Skin rash, itching, swelling of the face, lips, tongue. |
| Difficulty breathing | Shortness of breath, feeling of tightness in the chest. |
| Changes in heart rate | Feeling like your heart is beating fast or irregularly, fainting. |
| Signs of infection | Fever, chills, sore throat, pain when urinating. |
| Other serious symptoms | Severe headache, stomach ache, back pain, nausea, vomiting. |
| Symptoms that should be reported to the doctor if they persist or are bothersome | |
| Weight gain | Weight gain. |
| Leg swelling | Swelling in the legs or ankle area. |
| Changes in the digestive system | Constipation or diarrhea. |
Take-Home Message
- Siltuximab is a specific treatment for a rare disease called multicentric Castleman disease (MCD), given through a vein in a hospital.
- Tell your doctor about your other illnesses and all medications you are taking before starting treatment.
- This medicine may reduce the body's immunity. Therefore, if you develop symptoms of infection such as fever and cough, tell your doctor immediately.
- Avoid becoming pregnant during treatment and for 3 months after stopping. Use an additional form of birth control.
- If you experience any serious side effects, such as an allergic reaction or difficulty breathing, seek medical advice immediately.
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