Bortezomib

Uses	Multiple Myeloma And Mantle Cell Lymphoma
Therapy	Anti-Neoplastic
Side Effects	Numbness And Tingling, Tiredness, Diarrhoea, Low Platelets

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Molecule Description

Bortezomib is a prescription anticancer medication that belongs to a class of drugs known as proteasome inhibitors. It is used to treat multiple myeloma (a cancer of plasma cells) and mantle cell lymphoma. The medication works by reversibly inhibiting the 26S proteasome, a cellular complex that breaks down unneeded or damaged proteins. This causes abnormal proteins to build up inside cancer cells, disrupting normal function and cell division and ultimately causing the cancer cells to die. This medicine is supplied as a sterile powder in vials and must be reconstituted by a trained healthcare professional before administration. Because of its cytotoxic nature and specific delivery requirements, clinicians prepare it in a clinical setting following standard safety protocols. Bortezomib is administered either by intravenous (IV) or subcutaneous (SC) injection under the supervision of an oncologist or haematologist. Regular blood tests and clinical monitoring are required during treatment.

Uses

Treatment Of Multiple Myeloma And Mantle Cell Lymphoma.

Contraindications

When should one not use Bortezomib

If you have a known hypersensitivity or severe allergic reaction to bortezomib, boron, or any of the inactive excipients.
Bortezomib for injection is contraindicated for intrathecal (injecting it into the spinal canal) administration.

Side effects

Common side effects of this drug are:

Common Side Effects
Nausea, diarrhoea, vomiting, and constipation
Low platelet count (thrombocytopenia), which may increase the risk of bruising or bleeding
Low white blood cell counts, including neutropenia and lymphopenia, which may increase the risk of infections
Peripheral neuropathy, which may cause numbness, tingling, pain, or weakness
Fatigue and weakness (asthenia)
Nerve pain (neuralgia)
Anaemia
Fever (pyrexia)
Loss of appetite
Rash
Less Common Side Effects
Difficulty sleeping (insomnia)
Muscle or joint pain
Low blood pressure, including a fall in blood pressure on standing
Serious Side Effects
Severe nerve problems: worsening numbness, tingling, nerve pain, or weakness
Severe blood-count changes: fever, signs of infection, unusual bruising, or bleeding
Heart problems: shortness of breath, swelling of the legs, or other symptoms of heart failure
Lung problems: new or worsening cough, shortness of breath, or difficulty breathing
Serious neurological problems: severe headache, confusion, seizures, vision changes, or other new neurological symptoms
Severe gastrointestinal problems: severe or persistent nausea, vomiting, diarrhoea, or constipation, particularly if associated with dehydration or dizziness

Precautions and Warnings

Pregnancy

No. Bortezomib may cause harm to an unborn baby.Women who can become pregnant should discuss effective contraception with their doctor before and during treatment

Breast Feeding

No. Breastfeeding is not recommended while receiving Bortezomib due to the potential risk of serious side effects on the nursing infant. Discuss with your doctor when you can safely resume breastfeeding.

Driving

Bortezomib may cause dizziness, fatigue, or low blood pressure, which can affect your ability to drive or operate machinery. Avoid these activities if you experience symptoms that impair your ability to do them safely.

Alcohol

There is no specific established alcohol interaction with bortezomib. However, alcohol may worsen dizziness, fatigue, or gastrointestinal symptoms. Discuss alcohol consumption with your doctor.

Other General Warnings

Talk to your doctor if

You develop new or worsening cough, shortness of breath, or difficulty breathing. Report these symptoms to your healthcare provider immediately because bortezomib can cause serious lung problems.
You develop fever, signs of infection, unusual bruising, or bleeding. These may be related to changes in your blood cell or platelet counts.
You develop signs or symptoms of heart problems, such as swelling of the legs or other symptoms of heart failure.
You experience dizziness, light-headedness, or fainting, particularly when standing up.
Attend all scheduled blood tests so your doctor can monitor your blood cell and platelet counts during treatment.
If your doctor recommends antiviral treatment to prevent herpes virus infection, take it exactly as prescribed.
Drink adequate fluids as advised by your doctor to help prevent dehydration, particularly if you have vomiting or diarrhoea.
Do not drive or operate machinery if you experience fatigue, dizziness, fainting, or low blood pressure.
Tell your doctor about all other medicines you are taking before starting bortezomib.

Mode of Action

How Does It Work?

Bortezomib is a proteasome (protein complex) inhibitor. It reversibly inhibits the chymotrypsin-like activity of the 26S proteasome, which breaks down proteins within cells. This interference can affect cell-cycle regulation and other cellular processes and may result in cell death.

Interactions

Interactions with other medicines

Tell your doctor about all prescription medicines, over-the-counter medicines, vitamins, supplements, and herbal products you take.
Medicines that affect CYP3A4 (such as rifampicin, carbamazepine, or St. John's wort) may alter bortezomib exposure.
Medicines that can cause peripheral neuropathy may increase the risk of nerve-related side effects.
Medicines that lower blood pressure may increase the risk of hypotension.
Medicines that affect blood glucose may require monitoring during treatment.
Your doctor will review your medicines and make any necessary adjustments.

Interactions with food items

Bortezomib is administered by injection, so food does not affect its absorption. There is no need for a specific food restriction unless advised by your doctor.

Dosage

Overdose

If an overdose is suspected, immediate medical attention is required. Excessive exposure may cause severe low blood pressure, low platelet counts, or other serious adverse effects. Treatment is supportive and includes monitoring and managing symptoms.

Missed a Dose

If you miss a scheduled injection appointment, contact your hospital or oncology clinic immediately to reschedule. Do not attempt to make up for a missed session on your own.

Frequently Asked Questions (FAQs)

Peripheral neuropathy involves nerve damage that may cause numbness, tingling, burning pain, or weakness in the hands and feet. It can occur during bortezomib treatment. Always report early nerve symptoms to your doctor so they can assess whether treatment adjustments are needed.

Bortezomib can be administered by either the subcutaneous or intravenous route, depending on the prescribed regimen. Subcutaneous administration may be associated with a lower frequency of some adverse effects, including peripheral neuropathy, compared with intravenous administration.

Bortezomib treatment may increase the risk of herpes zoster reactivation. Your doctor may prescribe antiviral medicine to reduce this risk.

Bortezomib can temporarily decrease platelet counts. Your doctor monitors blood counts during treatment and may adjust the schedule or dose based on your counts and clinical condition.

The duration of treatment depends on your specific cancer type, how well your disease responds to therapy, and your doctor's ongoing evaluation of your overall health and side effect tolerance.