But our friend didn't see a doctor. Like many Thais, she went off to the pharmacy, described her symptoms, and was issued some paracetamol-based tablets. Luckily, they worked. It could have been something other than a plain headache. If it had been migraine, she would need have needed different medicine.
Persistent headaches can mean something more serious.
What's more, the pharmacist did not draw her attention to the dangers of paracetamol. Taken as per indication, it's highly effective pain-killer. Taken in excess, it's a killer. Two tablets every four hours is the standard dose. But taking it every day for months is not a good idea.