Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call local emergency services or a crisis service if there is immediate danger.
Contact the treating clinician sooner if side effects are persistent, symptoms are getting worse, medication seems ineffective, or there are major changes in sleep, mood, appetite, or behavior.
Urgent help is appropriate if there are suicidal thoughts, severe mood or behavioral changes, hallucinations, signs of medication overdose, or concern that someone may harm themselves or another person.
Once symptoms are stable, periodic follow-up is still important.
Routine follow-up may include reviewing attention, impulsivity, school or work performance, relationships, sleep, appetite, mood, and substance use.
For people taking medication, clinicians may monitor blood pressure, pulse, weight, and, in children, growth.
They may also check whether medication is being taken safely and whether benefits last through the parts of the day when support is needed.
A routine appointment is appropriate for questions about organization, accommodations, or gradual treatment changes.
The article also says
ADHD usually requires ongoing review rather than a one-time visit.
Early in treatment, appointments may be more frequent while strategies or medicines are adjusted.
Needs can change during school transitions, a new job, pregnancy, menopause, illness, or major stress.
Periodic reassessment can help ensure that the diagnosis and treatment plan still fit the person’s circumstances.
Every sign above is quoted from the sofidex article on ADD/ADHD. If you are not sure, err upward — it is always reasonable to be checked.