This section outlines what to do about Methotrexate with respect to specific events:
Event | Value | Action |
Leucopaenia | <3.5*10^9/l | Stop & seek advice |
Neutropaenia | <2.5*10^9/l | Stop & seek advice |
Thrombocytopaenia | <150*10^9/l | Stop & seek advice |
Macrocytosis | >100 | Macrocytosis >100 Check B12 and folate |
Sequential falls in WCC or PMNs | >10% on occasions | Stop & seek advice |
Sequential falls in platelets | Sequential falls >10% on 3 occasions | Stop unless falls are from in platelets from a high level, which is a response to treatment |
Elevation of LFTs (AST, ALT, not ALP) | >3x normal | Stop & repeat LFTs (AST, ALT, not ALP) Mild transaminitis is common |
Falls in albumin | >5g/l | Stop. Repeat LFTs. (early sign of liver toxicity) |
Information with respect to gastrointestinal toxicity, pneumonitis and fertility is included in the respective linked items.
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