Antineoplastic Drugs Flashcards
Methotrexate
Folic Acid Analogue (Antimetabolite)
- Hepatotoxicity, category X “teratogenic”.
- PPIs increase plasma concentrations of MTX.
6-Mercaptopurine
Purine Analogue (Antimetabolite)
- Pharmacogenomics: screen for Thiopurine S-Methyltransferase. (Responsible for metabolism)
*For Azathioprine as well.
- 6MP dose should be reduced by 75% when used with Allopurinol.
Fludarabine
- Purine analogue, antimetabolite.
- Potent immunosuppressant (+++ w/ glucocorticoids)
- increased risk for opportunistic infections e.g. pneumocystis jirovecii pneumonia (PCP)
- co-trimoxazole at least 3 times a week, and continue for few weeks/up to a year after d.c.
5-Fluorouracil
- pyrimidine analogue, antimetabolite.
- pharmacogenomics: screen for Dihydro-pyrimidine Dehydrogenase (DPD) enzyme. (Absence = toxicity)
Cytarabine
- cytidine analogue, antimetabolite
- cytarabine syndrome: chemical conjunctivitis
Cyclophosphamide & Ifosfamide
- alkylating agents, nitrogen mustard
- hemorrhagic cystitis and bladder fibrosis, reduced by:
- Slow IV infusion
- Adequate hydration
- Mesna (w/ Ifosfamide)
Carmustine, Lomustine and Streptozocin
- alkylating agents, nitrosoureas
- highly lipid soluble, effective in the treatment of brain tumors
Busulfan
- alkylating agent, alkylsulfonate
- pulmonary fibrosis (busulfan lung)
- antiepileptic used as prophylaxis from Busulfan-induced seizures
Cisplatin, Carboplatin and Oxaliplatin
- alkylating agents, platinum analogues
- severe persistent vomiting, nephrotoxicity, ototoxicity ‘tinnitus’ and neurotoxicity. (Optic neuritis and peripheral neuropathy)
Doxorubicin/Daunorubicin
- cytotoxic antibiotics, anthracyclines — DNA Function, Topoisonerase I and II inhibitors.
- the red devil ‘doxorubicin,’ due to the dark red color of the veins
- irreversible dose-dependent cardiotoxicity
- dexrazoxane is a cardioprotective against anthracyclines cardiotoxicity
Bleomycin
- cytotoxic antibiotic
- pulmonary toxicity (bleomycin lung)
- skin toxicity (hyperpigmentation of hands)
Vincristine, Vinblastine and Vinorelbine
- vinca alkaloids (microtubule inhibitors) — mitotic spindle
- neurotoxic
- only IV, fatal if given intrathecally
Paclitaxel, Docetaxel and Cabazitaxel
- Taxanes, microtubule inhibitors — mitotic spindle
- Used in lung cancers
- Hypersensitivity reactions
- Neurotoxic (peripheral neuropathy)
Tamoxifen
- SERM — Endocrine Therapy
- Prodrug (activated by CYP2D6), slow metabolizers and CYP2D6 inhibitors will suffer lowered efficacy.
- Most potent metabolite is Endoxifen.
- Increased risk of Thromboembolism (DVT, PE and stroke) and endometrial cancer.
- Used in Estrogen Receptor Positive Breast Cancer.
Fulvestrant
- SERD ‘degrader, — Endocrine Therapy.
- Used in ER-positive breast cancer.
- Pure antagnoist, no partial agonist effects. No endometrial cancer risk.
Anastrozole, Letrozole and Exemestane
- Aromatase Inhibitors — Endocrine Therapy.
- Letrozole & Anastrozole (non-steroidal) are ‘reversible,’ while Exemestane (steroidal) is irreversible.
- Aromatization (Testosterone —to— Estrogen in adipose tissues)
Leuprorelin, Goserelin and Triptorelin
- GnRH Analogues — Endocrine Therapy.
- They are used in hormone-dependent breast cancer and endometriosis.
Cyproterone Acetate (Androcur)
- Antiandrogen — Endocrine Therapy.
- Synthetic steroidal antiandrogen, used in prostate cancer.
- Flutamide, Nilutamide and Bicalutamide are synthetic antiandrogens for the same use.
Rituximab
- Anti-CD20 (CD20 is found on normal and malignant B lymphocytes)
- Used in blood cancers:
- non-Hodgkin’s Lymphoma
- Chronic Lymphocytic Leukemia
- Autoimmune diseases and organ transplantation.
— Severe infusion reactions. FATAL.
— RISK FOR PML (If JCV-positive)
Trastuzumab and Pertuzumab
- Anti-HER2 (Human Epidermal Growth Factor Receptor 2)
- HER2-positive breast cancer.
- Risk for HF (worsened w/ anthracyclines)
Cetuximab and Panitumumab
- EGFR Inhibitor.
- Used in Metastatic Colorectal Cancer Wild-Type RAS ONLY. Doesn’t work in mutations.
- Cetuximab is also used in head and neck cancer.
Bevacizumab
- Anti-VEGF (Vascular Endothelial Growth Factor) — inhibits angiogenesis.
- Used in:
- Colorectal Cancer
- Lung Cancer
- Renal-cell Carcinoma
— USED IN EYE DISEASES SUCH AS AGE-RELATED MACULAR DEGENERATION.
Daratumumab
- ANTI-CD38 — CD38 is expressed at relatively low levels on normal lymphoid and myeloid cells, over expressed in multiple myeloma cells.
- Used in Multiple Myeloma (in combination with Bortezomib)
Sunitinib
- Tyrosine Kinase Inhibitor
- Used in:
- Renal cell carcinoma
- Gastrointestinal Stromal Tumor
- Pancreatic Neuroendocrine Tumors