"You should always ask doctors and dentists to use sterilized equipment and be prepared to pay for new syringe needles in hospitals or clinics."

Unfortunately, some poor countries don't HAVE new syringes & needles even if you BEG to pay for them. Consider taking some with you in original sealed packages, in your checked luggage.

If you want to take a lighter without anyone fussing, keep a couple packs of cigarettes nearby. Security may wonder about a Bic with no tobacco, but they understand smokers.

Sue