Same-day contact is warranted for collapse, fainting, severe weakness, repeated vomiting, inability to urinate, or any seizure-like episode. These signs can indicate a serious adverse reaction or an interaction that needs immediate guidance. It is also reasonable to call if constipation becomes painful, if the dog stops eating for a full day, or if new agitation appears after adding another serotonergic product.
For the call, have the essentials ready: the exact medication name (clomipramine/clomicalm), tablet strength, last dose time, and any other products given in the last 72 hours. If possible, email a short video of the concerning behavior (tremors, pacing, collapse recovery). Clear information helps the veterinarian decide whether to stop the medication, adjust the plan, or go to emergency care.