Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Seek emergency help now if you have:
Severe or rapidly worsening trouble breathing
Blue, grey, or unusually pale lips or skin
Confusion, fainting, or extreme drowsiness
Chest pain with breathlessness
Coughing up more than a small streak of blood
A very low oxygen reading, if you have been told how to monitor it
And for anyone, someone who:
you believe has taken an overdose or swallowed something poisonous
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
2
Is any of this happening?
Be seen today
Arrange a prompt medical assessment if you develop a new persistent cough, fever, wheezing, or unexplained shortness of breath while taking a medicine known to affect the lungs.
Contact the prescribing team sooner if symptoms are worsening or limiting normal activity.
3
Does any of this apply?
Book an appointment
And for anyone, someone who:
is having side effects from a medicine, or is struggling to take it as prescribed
The article also says
Do not drive yourself if you are severely breathless, faint, or confused.
Bring an up-to-date medicine list or the medicine containers if this can be done safely.
Every sign above is quoted from the sofidex article on Drug-induced pulmonary disease. If you are not sure, err upward — it is always reasonable to be checked.