, or Lustral) falls under the category of selective serotonin reuptake inhibitors (SSRIs) and it is not recommended to alter doses (such as half daily dose) as and when required without consultation with your psychiatrist
. Behavioural changes are known to occur at sudden decrease in maintenance doses.
As SSRIs are known to impair performance of skilled tasks (e.g., driving) taking alcohol with it is therefore not recommended.
There are also effects on the liver
, and hence please consider discussing with your doctor before altering (increasing or decreasing) the dose.