Breast Cancer Drugs Flashcards
1
Q
Treatment of cancer
A
Hormone therapy
- Estrogen-sensitive breast cancer
- Anti-estrogen: Tamoxifen, Raloxifen
- Aromatase inhibitors
Targeted therapy
- Trastuzumab (Herceptin)
2
Q
Hormone Therapy
- Antiestrogen
- Aromatase Inhibitor - 1st line
A
Antiestrogen
- Tamoxifen - Nolvadex
- Toremifene - Fareston
- Raloxifen - Evista
Aromatase Inhibitors
- Anastrozole - Arimidex
- Letrozole - Femara
- Exemestane - Aromasin
3
Q
Nolvadex
- MOA
- Dose
- PRE-menopausal
- POST-menopausal
- SEs
A
Tamoxifen
- MOA: STIMULATES uterine estrogen receptors
Dose
- 20 mg BID in PRE-menopausal
- 10 mg BID or 20 mg QD in POST-Menopausal
SEs
- Hot flashes, breast pain, wt gain, HA, edema, nausea
- ** Thrombo-embolism
- Endometrial cancer
- Menstrual irregularities, hyperCa, bone loss, cataracts, tumor flare
4
Q
Nolvadex
DDI
- Strong 2D6 inhibitors
- Mod 2D6 inhibitors
- Alternative
A
Tamoxifen
- Is a prodrug convert by 2D6
- Strong 2D6 inhibitors: paroxetin, fluoxetin
- Mod 2D6 inhibitors: setraline, duloxetine, amiodarone
Alternative:
- Switch tamoxifen to aromatase inhibitor (anastrozole), but it’s not for PRE-manopausal
- SSRIs or venlafaxine, desvenlafaxine, wellbutrin, bupropion
5
Q
Evista
- Indication
A
Raloxifene
- I: reduce risk of breast cancer. Only for postmenopausal women
6
Q
Evista
- MOA
- Indication
- FDA approved:
- BBW
A
Raloxifense
- MOA: BLOCKS estrogen receptor
- Indication: to reduce risk of breast cancer
- FDA approved: POSTmenopausal women with osteoporosis with high risk of breast cancer. NOT for PRE-menopausal women
- BBW: blood clot and stroke => d/c 72H b/4 prolonged immobility
- An alternative to tamoxifen to REDUCE breast cancer in post-menopausal
7
Q
Raloxifense and Tamoxifen Comparison
A
- Raloxifene is less likely to lead to uterine cancer, hysterectomy, or cataracts
- Raloxifense box warning: blood clot and stroke => d/c 72H b/4 prolonged immobility
- Tamoxifen STIMULATES uterine estrogen receptors while Raloxifense BLOCKs them
- Both increase risk of blood clot but Raloxifense is less likely
- If pt switches from tamoxifen to Evista, the clock does NOT start over. Pt should be on these drugs for 5-10 yrs
8
Q
Arimedex
- Class:
- Dose
A
Anastrozole
- Aromatase Inhibitors
- 1mg PO QD
9
Q
Femara
- Class:
- Dose
A
Letrozole
- Aromatase Inhibitors
- Dose: 2.5mg QD
10
Q
Aromasin
- Class:
- Dose
A
Exemestane
- Aromatase Inhibitors
- Dose: 25mg QD
11
Q
Aromatase Inhibitors
- SEs
- DDI
- Advantage over tamoxifen
A
- SEs: hot flashes, tumor flare, HA, wt gain, vaginal bleeding, GI upset
- DDI: Tamoxifen decreases aromatase inhibitors
Adv:
- No hyperCa++
- No thromboembolism
- No endometrial cancer
12
Q
Fareston
- Class
- Dose
A
Toremifene
- Class: Anti-estrogen
- Dose: 60mg QD
13
Q
EGFR
A
- Epidermal Growth Factor Receptor
14
Q
Herceptin
A
Trastuzumab
15
Q
Herceptin
- Class:
- Indication
- Dosage form:
- Duration of treatment
A
Trastuzumab
- Class: Monoclonal antibody
- I: Herceptin + Paclitaxel = 1st line tx of HER-2 overexpressing metastatic breast cancer & HER-2 + metastatic stomach cancer
- DF: injection
Dose
- Initial: 4mg/kg IV infusion over 90 min
- Then: 2mg/kg IV over 30 min weekly x 51 weeks
- Total is 52 weeks