Pruritus in Polycythemia Vera (PV)
What Causes the Itching
PV‑related pruritus is primarily driven by histamine release from basophils, often triggered by water, temperature changes, or air exposure.
Other contributors mentioned:
- Iron deficiency / microcytosis
- High cell counts
- Stress
- Skin dryness
- Biogenic amine imbalance (serotonin, histamine)
Treatments Reported as Most Helpful
1. Antihistamines (H1 blockers)
Common first‑line options:
- Diphenhydramine (Benadryl)
- Loratadine (Claritin)
- Desloratadine (Clarinex)
- Cyproheptadine (Periactin) — often effective but sedating
2. H2 Blockers
Used because histamine also acts on H2 receptors:
- Famotidine (Pepcid, Zantac)
- Cimetidine (Tagamet)
3. Serotonin‑Related Medications
These appear repeatedly as highly effective for some:
- Paroxetine (Paxil)
- Other SSRIs (e.g., Lexapro)
- Doxepin (oral or topical)
4. Light‑Based Therapies
One of the most consistently successful categories:
- PUVA therapy (psoralen + UVA light)
- UVB phototherapy
- Natural sunlight exposure
Many individuals reported complete or near‑complete relief.
5. Aspirin
Low‑dose aspirin was frequently reported to reduce itching.
6. Interferon
Improvement often occurred as blood counts normalized.
7. Other Medications Mentioned
- Gabapentin (Neurontin)
- Ropinirole (Requip)
- Dexamethasone (short‑term use)
Supplements & Natural Approaches
Individual responses varied:
- Quercetin
- Turmeric
- Vitamin D
Topical Products
Helpful for some:
- Sarna Sensitive (pramoxine 1%)
- Aveeno anti‑itch products
- Pinetarsol / Pinetaroil
- Baby oil or moisturizers after showering
Practical Strategies That Helped Many
- Use lukewarm water; avoid hot showers
- End with a cold rinse
- Pat dry, don’t rub
- Dress immediately after bathing
- Use gentle cleansers (e.g., baby wash, Cetaphil)
- Keep the home cool
- Light exercise (e.g., lifting hand weights) sometimes stops an attack
- Reduce stress, which several people found to be a trigger