4 syllables: Ta, cro, li, mus. Stress on cro.
tuh-KROH-lim-uhs
/təˈkroʊlɪməs/
Tacrolimus is pronounced tuh-KROH-lim-uhs (/təˈkroʊlɪməs/). It has four syllables (Ta-cro-li-mus), with the stress on "cro". Tacrolimus is a potent immunosuppressant medication used to prevent organ rejection after transplantation. It binds to the protein FKBP-12 to inhibit calcineurin, reducing T-cell activity. Clinically, it requires careful dosing and monitoring due to narrow therapeutic range and potential nephrotoxicity and neurotoxicity.
nounTacrolimus is a potent immunosuppressant medication used to prevent organ rejection after transplantation. It binds to the protein FKBP-12 to inhibit calcineurin, reducing T-cell activity. Clinically, it requires careful dosing and monitoring due to narrow therapeutic range and potential nephrotoxicity and neurotoxicity.
How to Pronounce Tacrolimus
"The patient was started on tacrolimus to prevent rejection after the kidney transplant."
"Tacrolimus levels are monitored regularly to ensure efficacy while minimizing side effects."
"Physicians adjust the tacrolimus dosage based on blood concentration measurements."
Pronounce as ta-KROL-i-mus, with primary stress on the second syllable: ta-CROL-i-mus. IPA US: təˈkrɒlɪˌmʌs; UK: təˈkrɒlɪˌmjuːs. Break it into four syllables: ta- (unstressed, quick) + CROL (stressed) + i (light) + mus (muss). The k sound is as in kit, and the r is a medium English rhotic r. Mouth position: start with a light schwa-like first syllable, then a strong rounded /ɒ/ or /ɒl/ onset for the second, then a short 'i' /ɪ/, finishing with /məs/. Audio reference: you can compare with professional sources like Cambridge Pronouncing Dictionary or Forvo entry for Tacrolimus.
Common errors: (1) stress misplaced on the first syllable ta-; (2) slurring the middle ‘crol’ into a single beat, e.g., ta-CROL-oo-mus; (3) mispronouncing the final -mus by adding a strong vowel or ending with -muhs instead of -mus. Correction: emphasize second syllable CROL with a clear /ɒl/ vowel cluster and keep final -mus as /məs/. Listen to native usage and practice segmented practice: ta-CROL-i-mus, then say it in a smooth four-beat flow.
US: təˈkrɒlɪˌmʌs with rhotic r; UK: təˈkrɒlɪˌmjuːs where final vowel height shifts and /juː/ occurs in some speakers; AU: similar to UK but with a flatter vowel quality and sometimes a lighter second syllable due to non-rhotic tendencies in certain contexts. Focus on second syllable ‘CROL’ with /ɒ/ and the final /ɪˌməs/ nuance. In all, stress remains on the second syllable; the main variation is the vowel color and the optional /juː/ in the final segment.
The difficulty lies in balancing the multi-syllabic macrolide structure with a mid-length stress on the second syllable, plus the cluster /crol/ that can tempt vowel reduction or misplace the /ɒ/ vowel. The final syllable /məs/ is light and quick, which can be overlooked in rapid speech. Practice segments: ta-CROL-i-mus, then link into a four-beat rhythm to keep the stress accurately placed.
Tacrolimus carries the multi-syllabic, technical flavor that tends to trip listeners on the second syllable; ensure you maintain a crisp /krɒl/ sequence, avoiding an elongated /ɒ/ or /oʊ/ that can shift the word’s rhythm. Maintain a steady tempo through all four syllables and keep the final /əs/ or /məs/ light and unstressed.
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Tacrolimus derives from the bacterium Streptomyces tsukubaensis, whose product was named FK506 during early development. The compound is a macrolide lactone with a complex cyclic structure. The “Tacr-” segment is a modern pharma-naming convention, while “-limus” reflects a typical pharmacological suffix in macrolide drugs, derived from Latin -imus indicating a chemical series. The drug was first discovered in the 1980s and was initially researched for immunosuppressive properties before clinical adoption. Its name in research literature often pairs with FK506, reflecting the original designation, with Tacrolimus becoming the favored generic label as formulations, dosing, and regulatory approvals evolved. The etymology reflects multidisciplinary origins: microbiology (Streptomyces tsukubaensis), medicinal chemistry (macrolide structure), and pharmacology naming conventions that emphasize therapeutic class and mechanism. First known use in pharmacology records appears in late 1980s drug development reports, with widespread clinical use by the 1990s for organ transplantation and certain autoimmune conditions under physician supervision.
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Words that rhyme with "Tacrolimus"
-cus sounds
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