Short answer first, then the reasoning. The variables that decide how a cross-border order goes are declaration wording, the destination country's import rules for prescription medicines, and whether the shipment looks commercial. Personal-import allowances exist in some jurisdictions and not in others, and where they exist they are usually conditional on a prescription and a quantity limit. The failure mode is normally a seizure notice rather than anything worse, and a reshipment policy is the thing worth confirming before ordering rather than after.

PharmD_Rodriguez said:

The variables that decide how a cross-border order goes are declaration wording, the destination country's import rules for prescription medicines,…

Agreed, and cold chain is the underrated risk on long routes. A shipment held at a border for a week has had a temperature excursion whether or not it arrives.

PharmacoVig_BOS said:

I spent a month blaming the drug for headaches and light-headedness that turned out to be salt and water, which is embarrassing and apparently common.

This is my experience too, for whatever a second data point is worth. Nothing to add that would improve it.

Clinical perspective, offered as context rather than as advice.

Electrolyte monitoring on hydration — especially important during early titration when GI effects are most pronounced:

• Sodium: 141 mEq/L (normal, but was low at week 2 from vomiting)
• Potassium: 4.5 mEq/L (supplement if below 3.5)
• Magnesium: 2.1 mg/dL (supplementing with glycinate)
• Phosphorus: 3.5 mg/dL (normal)

Low electrolytes cause muscle cramps, heart palpitations, and fatigue — symptoms often blamed on the medication itself. Check your levels before assuming it's a drug side effect.