Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Fainting, severe breathing difficulty, collapse, a seizure, or a markedly abnormal heartbeat with dizziness requires emergency care rather than a routine appointment.
Immediate crisis or emergency services are appropriate if there is a current risk of self-harm.
And for anyone, someone who:
Contact a clinician promptly for new nausea, loss of appetite, visual changes, unusual weakness, confusion, or palpitations.
After discharge, follow-up may include a review of kidney function, electrolytes, heart rhythm, and all medicines.
If digoxin is still needed, the prescribing clinician will decide when or whether to restart it and what monitoring is appropriate.
Patients should not restart a held medicine on their own.
Routine follow-up is appropriate for discussing ongoing fatigue, medication questions, dose organization, or planned laboratory monitoring when symptoms are stable.
And for anyone, someone who:
The article also says
A medication review can identify duplicate prescriptions, interacting drugs, confusing tablet strengths, or problems using pill organizers.
It may help to keep an updated medicine list, use one pharmacy when possible, and ask before starting supplements or over-the-counter products.
If the overdose was intentional or connected with thoughts of self-harm, the treatment plan should also include compassionate mental health assessment and support.
Every sign above is quoted from the sofidex article on Cardiac glycoside overdose. If you are not sure, err upward — it is always reasonable to be checked.