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Chokri Ben Lamine: Drinks and Hematology – What Matters Clinically? 
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Aug 17, 2026, 20:08

Chokri Ben Lamine: Drinks and Hematology – What Matters Clinically? 

Chokri Ben Lamine, Assistant Consultant at King Faisal Specialist Hospital and Research Center, shared a post on X:

“Drinks and Hematology: what matters clinically?

Alcohol

  • Heavy use can cause macrocytosis, with or without anemia, leukopenia and thrombocytopenia
  • Mechanisms: direct marrow toxicity, folate deficiency, liver disease and hypersplenism
  • Impairs platelet function, so bleeding may occur despite an acceptable count
  • Avoid with severe thrombocytopenia, mucositis, liver disease, iron overload, anticoagulation or hepatotoxic chemotherapy
  • Dehydration may precipitate sickle-cell vaso-occlusive crisis

Tea and coffee

  • Tannins and polyphenols reduce non-heme iron absorption
  • Keep a 2-hour gap from oral iron and iron-rich meals
  • They do not cause iron deficiency alone but may impair correction when intake is marginal

Orange juice

  • Vitamin C can improve oral iron absorption
  • Not essential if iron is tolerated and responding

Calcium-fortified juice can markedly reduce eltrombopag absorption.

Milk and dairy drinks

  1. Reduce absorption of oral iron
  2. With eltrombopag (Revolade and Promacta): take eltrombopag at least 2 hours before or at least 4 hours after dairy, calcium-fortified drinks, antacids or mineral supplements.

Grapefruit juice

Inhibits intestinal CYP3A/P-glycoprotein, leading to increased drug exposure and toxicity

Avoid with:

  • Venetoclax (Venclexta)—also avoid Seville oranges and starfruit
  • Ibrutinib (Imbruvica)
  • Tacrolimus (Prograf)
  • Sirolimus (Rapamune)
  • Several TKIs and other oral anticancer agents—always check the individual label

Green tea and extracts

  • Ordinary intake reduces iron absorption when taken with meals
  • High-dose epigallocatechin gallate supplements may antagonize bortezomib (Velcade) in preclinical studies; clinical relevance is uncertain, but concentrated extracts are best avoided during bortezomib therapy.

Tonic water

  • Contains quinine
  • Rarely causes severe drug-induced immune thrombocytopenia, hemolysis or thrombotic microangiopathy

Permanent avoidance after suspected quinine-associated thrombocytopenia—even small re-exposure may trigger rapid recurrence.

Green smoothies

  • Vitamin K-rich ingredients do not need to be eliminated with warfarin (Coumadin)

Keep intake consistent and monitor INR after major dietary changes.

Energy drinks

  • No hematinic or platelet-raising benefit
  • High caffeine may worsen tachycardia, tremor and dehydration-related symptoms – particularly poorly tolerated with severe anemia or cardiotoxic therapy.

Water

  • Dehydration causes relative erythrocytosis and may worsen hyperviscosity, AKI, tumor lysis syndrome and sickle-cell complications
  • During venetoclax initiation/ramp-up: approximately 1.5–2 L/day, starting 2 days beforehand, unless cardiac/renal fluid restriction requires an individualized plan.

Neutropenia and HSCT

Avoid unpasteurized juice, raw milk and unsafe water

Use pasteurized products and safe drinking water.

MCQ: A patient taking eltrombopag drinks it with milk. Expected effect?

  1. Increased thrombosis
  2. Reduced eltrombopag absorption
  3. Increased hepatotoxicity
  4. No interaction

OSCE pearl: Always ask specifically about alcohol, grapefruit, tonic water, tea and coffee timing, energy drinks, herbal beverages and fortified juices—patients rarely classify these as ‘medications.’

Sources: NIAAA—alcohol-related hematologic effects, NIH MedlinePlus—oral iron, Eltrombopag prescribing information, FDA venetoclax label, FDA tacrolimus label, Blood—green tea/bortezomib study⁠.”

Other posts featuring Chokri Ben Lamine on Hemostasis Today.

anemia Blood Bortezomib Caffeine Calcium Chokri Ben Lamine Drinks Eltrombopag Folate Deficiency Health Hematology Hemostasis Hemostasis News Hemostasis Today hepatotoxic chemotherapy HSCT Hypersplenism Ibrutinib Immune thrombocytopenia Iron ITP leukopenia Liver Disease Macrocytosis Medicine mucositis Neutropenia polyphenol Promacta quinine Revolade Sirolimus Tachycardia tacrolimus Tannin thrombocytopenia TKIs Venetoclax Vitamin C Warfarin
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