A LITTLE LIGHTBULB MOMENT
Drugs · Immunology and rheumatology
methotrexate: antimetabolite
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METHOTREXATE marks one weekday, not every day.
The idea behind the cue
Selected inflammatory and oncologic conditions under different regimens. Interferes with folate-dependent pathways and immune activity. Key safety: Severe toxicity from accidental daily instead of weekly inflammatory-disease dosing. Monitor: CBC, renal and hepatic function and regimen accuracy. Counseling: For a prescribed weekly inflammatory regimen, use a clearly designated weekly day.
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Short & simple
METHOTREXATE marks one weekday, not every day.
Acronym
METHOTREXATE marks one weekday, not every day.
Story
Selected inflammatory and oncologic conditions under different regimens. Interferes with folate-dependent pathways and immune activity. Key safety: Severe toxicity from accidental daily instead of weekly inflammatory-disease dosing. Monitor: CBC, renal and hepatic function and regimen accuracy. Counseling: For a prescribed weekly inflammatory regimen, use a clearly designated weekly day.
Connect the pieces
- Role: Selected inflammatory and oncologic conditions under different regimens
- Mechanism: Interferes with folate-dependent pathways and immune activity
- Safety: Severe toxicity from accidental daily instead of weekly inflammatory-disease dosing
- Monitor: CBC, renal and hepatic function and regimen accuracy
- Counseling: For a prescribed weekly inflammatory regimen, use a clearly designated weekly day
Know the limits
A focused drug study point, not a complete dosing or prescribing reference. Check indication, formulation, patient factors and the linked label.
DailyMed: TREXALL (METHOTREXATE) TABLET, FILM COATED [TEVA WOMEN'S HEALTH LLC] ↗Check your understanding
A rheumatoid-arthritis prescription intended once weekly is entered as daily. What is the priority?
A. Correct the potentially fatal dosing-frequency error before dispensing.
B. Dispense daily because all methotrexate regimens share the same schedule.
C. Correct only the tablet quantity while retaining the daily directions.
D. Rely on folic acid to prevent toxicity from a frequency error.
Reveal explanation
Correct the potentially fatal dosing-frequency error before dispensing.
Low-dose inflammatory regimens commonly use weekly dosing; accidental daily administration can cause severe or fatal toxicity. Oncology schedules are separate.