You should have all of your medications and essential items as carry on, just in case your baggage become delayed or lost.
Place all medications (any size, including liquids and gels) in a large clear zip top bag and mark it as 'essential medication'. Take it out at security, along with your usual liquids and gels bag and place it through the scanner with everything else. I'm a walking pharmacy when I travel and have never had security blink at my huge bag of medications and medical supplies.
Medications are exempt from the liquids and gels restrictions as long as they are separate and labelled as such. Prescriptions must be in their original packaging and have a prescription label on them. Some medically necessary products, without a prescription, are allowed too, such as liquid pain relievers, itch ointments, etc. There are a few restrictions, so check the TSA link in a previous post.
When travelling internationally, there are different restrictions in each country. Medications are always allowed, but some medical supplies or non-prescription items are not. Check the regulations for every country you will be stopping in.