Travellers often focus on passports and visas but forget that customs screens medicines too. A medicine that is easy to obtain over the counter or by prescription in India may be restricted or even banned in other countries. “Different nations have different drug rules, especially for medicines related to pain relief, anxiety, sleep disorders, ADHD, or certain cough syrups with codeine-based ingredients,” said Dr Sundar Krishnan, senior consultant, internal medicine, KIMS Hospitals, Thane. DISCLAIMER:  This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine. According to him, carrying large quantities without documentation can raise suspicion, even if the medicines are meant for personal use, said Dr Sundar. Dr Sundar described that customs authorities in many countries are strict about the entry of medicines into their borders.…