If you are travelling overseas and are planning to take your medicine with you there are some restrictions that apply to medicines supplied by the Pharmaceutical Benefits Scheme. See information here for restrictions

Australia has Reciprocal Health Care Agreements which means that as an Australian resident your are entitled to assistance with the cost of medical treatment in New Zealand, The United Kingdom, The Republic of Ireland, Sweden, The Netherlands, Finland, Italy, Belgium, Malta  & Norway.  SEE HERE FOR DETAILS

The Chronic Illness Alliance have produced a document as part of their Travel Insurance information. Visit their travel insurance issues website. http://www.chronicillness.org.au/workwelfarewills/travel_index.htm

Also have a look at Travel Health Tips from the Australain Government SMART TRAVELLER website

1. If you have a fever of 38.0 C (100.4 degrees F) or any sign of an infection, you need to see a doctor or hospital emergency room that day.
2. You are at risk from the infections listed below. Not all physicians are aware of all of the different organisms, so you should put this info on your laminated card.
• Streptococcus pneumoniae -- a common bacteria that can cause ear infections, pneumonia, meningitis, and sepsis (blood infection), 
• Hemophilus influenzae,
• Neisseria meningitidis,
• Escherichia coli,
• Malaria -- important to remember when traveling outside Australia,
• Capnocytophaga canimorsus -- an infection associated with dog bites,
• Babesiosis -- a rare tick-borne infection
3. What about antibiotics? The data is strong enough to recommend that children should receive daily penicillin (or if allergic, erythromycin). For adults there are two options:
   Option 1.     Antibiotic every day -- Penicillin or if allergic to penicillin, use erythromycin.
   
   The advantage to this approach is that if you are exposed to the most common bacteria (Streptococcus pneumoniae), you are more likely to fight off the infection. A disadvantage is that you have to remember to take the antibiotic every day. Also, we do not know the long-term chance of developing a bacteria resistant to penicillin or erythromycin. 
   Option 2.     Antibiotic at the first sign of infection -- In my case I have a super anti-biotic available Sulfamethoxazole [800mg] / Trimethoprim [160mg] which I am to take at the first sign of rising temperature.  You must keep a supply of antibiotics available to you at all times. If you develop an infection from Streptococcus pneumoniae, starting the antibiotic early can lower the risk of problems, though not as much as the first option. The advantage of this approach is not having to remember to take the medication each day. A problem is that people often forget where they placed the antibiotic and cannot find it when it's needed.
   
   ** It is very important to realize that you still need to see a doctor or other healthcare provider promptly for any sign of infection or fever. 
4.  Wear a Medic Alert bracelet or necklace indicating that you do not have a spleen. There are a number of different styles and producta available. I use a SOS Talisman. but visit your local pharamacy to see what is available. Also there are a number of products available via the internet.
5. Recommended vaccinations: (Please note that vaccinations do not provide complete protection! They help, but you still can have the problem they aim to prevent.)
   1.     Influenza (flu) vaccine each year
   2.     Hemophilus influenzae vaccine (Hib vaccination)
   3.     Meningococcal vaccine if traveling outside of the US into an area with Neisseria meningitidis
   4.     Pneumonia vaccine for you and family members living with you
   5.     If going into an area with malaria: You need to take a medication to prevent infection with malaria (depending on area of travel) and use mosquito/insect repellent with DEET. Try not to visit areas where malaria is epidemic.
6. If you are bitten by a dog. You may become infected with Capnocytophaga canimorsus. You need to be treated with an antibiotic such as Augmentin for at least five days.
7. If you develop a bacterial infection despite these precautions, you must receive medical treatment immediately in the hospital.