What should I do after a UAE pharmacy dispensed the wrong dosage to my child?

Report it to the health regulator for your emirate — in Dubai that is the Dubai Health Authority, in Abu Dhabi the Department of Health, and in the other emirates the Ministry of Health and Prevention. Pharmacies and pharmacists are individually licensed, and a dispensing error of this kind is precisely what those regulators investigate; outcomes can include disciplinary action against both the pharmacist and the pharmacy. Before anything else, preserve the evidence while it still exists: keep the medication and its labelled packaging, the original prescription, the receipt, and photos showing the discrepancy side by side. Take your son to his paediatrician now, even though he seems fine, and ask for the visit notes to record what he was given, at what strength, and for how long — a contemporaneous medical record is the single most valuable document if anything develops later. Then file the complaint in writing with everything attached. On a future claim: yes, one could exist if harm emerges, and it would rest almost entirely on the documentation you create this week, so be thorough now rather than relying on memory later. If symptoms ever do appear, a UAE healthcare lawyer can pick the file up with the evidence you preserved.