7.5 Complementary, Alternative & Integrative Therapies
Key Takeaways
- Complementary therapies are used alongside conventional treatment, alternative therapies replace it, and integrative oncology means evidence-based complementary modalities delivered within the cancer care plan.
- Patients who choose alternative medicine instead of conventional treatment for curable cancers have substantially worse survival, which makes early non-judgmental disclosure a safety intervention.
- St. John's wort is a strong CYP3A4 inducer that can reduce concentrations of many oral kinase inhibitors and other antineoplastics enough to cause treatment failure.
- High-dose antioxidant supplementation during radiation or chemotherapy may protect tumor cells and is generally discouraged during active treatment, and beta-carotene increased lung cancer incidence in smokers in randomized trials.
- Acupuncture, mindfulness-based stress reduction, yoga, music therapy, and massage have supportive evidence for cancer-related symptoms and are endorsed within evidence-based integrative oncology guidance.
7.5 Complementary, Alternative & Integrative Therapies
Blueprint focus: ONCC Domain II.H — Complementary, alternative, and integrative therapies. The exam tests three things: the vocabulary, the specific interactions that cause harm, and how the nurse practitioner elicits use without driving it underground.
Getting the Vocabulary Right
| Term | Definition | Stance |
|---|---|---|
| Complementary | Used alongside conventional cancer treatment | Often appropriate; assess for interactions |
| Alternative | Used instead of conventional cancer treatment | Dangerous when the cancer is curable |
| Integrative oncology | Evidence-informed complementary modalities delivered within the oncology care plan by trained clinicians | The professional standard |
The distinction is not semantic. Patients with curable breast, colorectal, lung, or prostate cancer who choose alternative medicine in place of conventional treatment have substantially higher mortality, largely because they refuse or delay surgery, chemotherapy, radiation, or hormone therapy. Recognizing this early — while the window for curative treatment remains open — is a clinical emergency disguised as a values conversation.
Prevalence and the Disclosure Problem
A large majority of patients with cancer use some complementary approach, and a substantial proportion never tell their oncology team, usually because they anticipate dismissal or fear the clinician will withhold treatment. Non-disclosure is the mechanism by which an avoidable interaction becomes an adverse event.
A workable framework:
- Normalize. "Most of my patients try something in addition to their treatment. What are you using or thinking about?"
- Ask specifically. Vitamins, minerals, herbs, teas, cannabis products, homeopathy, special diets, fasting, acupuncture, chiropractic, energy work, and anything purchased online.
- Ask what it is for. A patient taking turmeric for joint pain and one taking it to cure their cancer need entirely different conversations.
- Separate safe from unsafe. Endorse what is harmless or helpful. Name the specific risk of what is not.
- Offer a substitute. "I can't support high-dose antioxidants during radiation, but I can refer you to our acupuncture service for the same symptom."
- Document everything in the medication list, not in a free-text note nobody reads.
Dismissing a modality outright ends disclosure. So does agreeing to something unsafe. The goal is an accurate list plus a specific, reasoned position on each item.
Modalities With Supportive Evidence
Evidence-based integrative oncology guidance from ASCO and the Society for Integrative Oncology supports several modalities for symptom management — never as antineoplastic therapy.
| Modality | Best-supported uses |
|---|---|
| Acupuncture and acupressure | Chemotherapy-induced nausea and vomiting, aromatase-inhibitor arthralgia, cancer-related pain, hot flashes, chemotherapy-induced peripheral neuropathy symptoms |
| Mindfulness-based stress reduction and meditation | Anxiety, depressive symptoms, sleep disturbance, quality of life |
| Yoga | Fatigue, sleep quality, anxiety, quality of life |
| Music therapy | Anxiety, procedural distress, pain |
| Massage therapy | Pain, anxiety, mood |
| Hypnosis and guided imagery | Procedural anxiety, anticipatory nausea, pain |
| Exercise | Cancer-related fatigue (the strongest evidence of any supportive intervention), mood, physical function |
| Ginger | Adjunct for chemotherapy-induced nausea alongside guideline antiemetics |
Safety caveats still apply: deep tissue massage is avoided over an irradiated field, an area of thrombocytopenia, or bone metastases; acupuncture requires caution with severe neutropenia or thrombocytopenia and is avoided in a lymphedematous limb; spinal manipulation is contraindicated with vertebral metastases or spinal instability.
Herb and Supplement Interactions That Matter
| Product | Mechanism | Clinical consequence |
|---|---|---|
| St. John's wort | Strong CYP3A4 inducer and P-glycoprotein inducer | Reduces concentrations of imatinib, irinotecan, docetaxel, many kinase inhibitors, and hormonal agents — a documented cause of treatment failure |
| Grapefruit and Seville orange | Irreversible intestinal CYP3A4 inhibitor | Raises concentrations and toxicity of many oral agents |
| Garlic, ginkgo, ginger (high dose), fish oil, vitamin E, dong quai | Antiplatelet or anticoagulant effects | Bleeding risk, especially with thrombocytopenia or anticoagulation |
| Green tea extract (high dose EGCG) | Proteasome-inhibitor antagonism; hepatotoxicity at high doses | May reduce bortezomib activity |
| Soy isoflavones and black cohosh (concentrated supplements) | Phytoestrogen activity | Theoretical concern in hormone-receptor-positive disease; dietary soy is not the same as concentrated supplements |
| Valerian, kava | Sedation, hepatotoxicity (kava) | Additive sedation with opioids and benzodiazepines; kava-associated liver failure |
| Turmeric/curcumin (high dose) | CYP and P-glycoprotein effects; antiplatelet | Interaction and bleeding risk at supplement doses |
| Cannabis and CBD | CYP3A4 and CYP2C9 inhibition | Can raise concentrations of some antineoplastics and of warfarin; also additive sedation |
Practical rule: ask patients to stop herbal supplements around the time of surgery (commonly 1 to 2 weeks before) and to clear any new supplement with the oncology team before starting it.
The Antioxidant Question
This is a frequent exam item. Radiation and several chemotherapeutic agents kill tumor cells partly through reactive oxygen species. High-dose antioxidant supplementation — vitamin C, vitamin E, beta-carotene, selenium, N-acetylcysteine — could in principle protect tumor cells along with normal cells.
- The prevailing recommendation is to avoid high-dose antioxidant supplements during active radiation or chemotherapy, while encouraging an antioxidant-rich diet, which delivers far lower doses.
- Beta-carotene supplementation increased lung cancer incidence and mortality in smokers in randomized trials, and is contraindicated in current and former smokers.
- Correcting a documented deficiency, such as vitamin D or iron, is entirely different from taking megadoses and should be done.
Communicating About Unproven Cancer "Cures"
When a patient is considering abandoning conventional treatment for an alternative regimen:
- Do not argue with the belief; ask what they hope it will do and what worries them about conventional treatment. Fear of chemotherapy toxicity, a bad family experience, distrust rooted in prior discrimination, and cost are the usual drivers — and several are fixable.
- State the stakes plainly and once: what the cancer's curability is with treatment, and what is known about outcomes without it.
- Offer the integrative alternative that meets the same underlying need, and keep the door open with a scheduled follow-up rather than a discharge.
- Preserve the relationship. A patient who feels judged stops coming back, and the opportunity to reconsider disappears with them.
A patient taking imatinib for chronic myeloid leukemia mentions he started St. John's wort 6 weeks ago for low mood. His BCR-ABL1 transcript level, previously falling, has risen. What is the most likely explanation?
A patient receiving definitive chemoradiation for head and neck cancer asks whether he should take high-dose vitamin C and vitamin E supplements to 'protect his healthy cells.' What is the most appropriate response?
A woman with newly diagnosed stage II hormone-receptor-positive breast cancer tells the nurse practitioner she plans to decline surgery and chemotherapy in favor of an intravenous vitamin and herbal protocol. What is the most appropriate initial response?