Okay, let me see... You say you are walking the Frances, so I will presume you are starting at St. Jean Pied de Port. About 35 days later, you arrive at Santiago. You may stay at Santiago for a few days, then proceed to somewhere else.
So, you need to leave St. Jean Pied de Port with enough supply to last until Santiago, but you can ship ahead everything you will not need until you get to Santiago.
I will presume you will bring all your supplements and prescription medications with you to start. While many nutritional supplements can be obtained in Europe, the entire concept of Over The Counter (OTC) medications, and all the stuff we can get without prescription is radically different across all of Europe. Allow me to explain.
In every European country I have ever visited or lived in small, family run pharmacies abound. There are no chain pharmacies, per se. Those that appear to be chain stores are usually cosmetics shops. My European friends stock up on OTC stuff when they visit the US because so much of this stuff is only available either by prescription, or you are at the mercy of the local pharmacist as to brand selection. In Europe, in a supermarket, you typically cannot get anything more health related than maybe band aids (plasters), first aid tape perhaps some gauze. But typically nothing more, not even aspirin or Tylenol (called Paracetamol in Europe)
One of my favorite stories goes back about 10 years when I was in Venice. I contracted bronchitis, with a hacking cough. I KNEW exactly what I needed. I needed the sort of industrial strength cough syrup to cover all the symptoms, such as we have in every grocery store in the US.
I went into a pharmacy with one of those green neon crosses out front. The woman behind the counter was very polite and helpful. She listened patiently as I explained, using basic Italian phrases and pantomime that I had a chest cough, nasal congestion and headache. I used the correct Italian phrases. She kept saying "bueno, bueno, bueno," and "si, si, si."
After I finished, she shrugged and turned to the shelves behind her, grabbed the ONLY likely looking box on the shelf, literally blew the dust off the box top, and ceremoniously plopped it down in front of me explaining that this was exactly what I needed. So I paid for the syrup and left. It did help.
The point is that there was only one, dusty box containing one bottle of cough syrup in the pharmacy. This occurs across Spain as well. However, I and many others have found that most Spanish pharmacists speak some English, they are very helpful, all the time. The availability of something you need is very good. But do not count on getting the same brand, dosage, or delivery method.
However, as regards nutritional supplements, and all prescription medications, I would advise strongly that you carry on board the aircraft your entire supply with labels, in as many original bottles or containers as possible. At least you will start with everything you need.
BE AWARE of the security rules and repackage your supply as needed to ensure it travels to Europe with you. Some times you have no choice but to send some things in checked luggage. Say a prayer. All my my prescription pills ride in the cabin with me, all the time.
On arrival, say at St Jean Pied de Port, I suggest you repackage the items into appropriate containers, splitting the supply into four portions. I presume you cannot or will not be willing to lug everything all the way. You do not need to.
Here is what you can do:
- Prepare the entire "to be" packaging system at home, then bring the pills, capsules, etc over in original containers with labels and prescription labels, and the eventual labelled supply of various sized zip lock bags.
- Organize your entire stash of meds and supplements into two parts.
Part A - everything you will not need until you arrive at Santiago.
Part B - 35-days “Camino supply” that you will divide into three parts.
Here is how you handle both parts:
Part A - EVERYTHING you will need once you arrive at Santiago.
When you arrive at St. Jean Pied de Port, contact, contact Express Bourricot there to convey one piece of luggage for you from St. Jean to Santiago. They make a run once or twice a month. It takes two days to drive the distance. At Santiago, Caroline (the owner) has an arrangement with a very nice hostal to lock the suitcase in a secured room until you arrive.
The service costs €70 (IIRC) for one bag up to about 40 or 45 pounds. In various years, I have used a large, locked, zippered duffel bag, and a rolling suitcase. Plan on one rolling bag or a large soft duffel bag well stuffed. Share space with another in your party if you can. Include your tourist clothes and any medication, beyond what you will need for 35 calendar days, the time you need to reach Sanitago. include the ubiquitous souvenirs you bought at St. Jean. Women love the locally-made espadrille shoes. They are a Basque speciality, and CHEAP.
The service is very reliable and secure. Storage at Santiago is also secure and reliable. While not cheap, it is, in my view far superior than sending through the post and closing your fingers. Others on the Forum share that view. Caroline’s web site is:
www.expressbourricot.com. Her phone number is: +33 661 960 476. She speaks good English. Also, your hotel or hostal host will know of her and can make the contact for you.
Part B - Your enroute / Camino supply
I advise using zip lock bags (snack sized) inside larger, thicker zip lock bags (quart or liter sized) to organize your medications for carrying on the Camino. In the US many pharmacies sell packages of small zip lock bags, small enough to put one day's supply of multiple pills and capsule into. Or, use two or three per day (morning and night), etc. depending on your needs. You can use a Sharpie pen to mark the bags. Save and recycle the tiny bags.
Next, separate the 35-days supply into 3 parts. The parts are as follows:
Part 1 - 14 days daily supply of prescription medications and supplements.
Part 2 - 14 days daily supply of prescription medications and supplements.
Part 3 - 7-10 days (choice) supply of prescription medications and supplements.
Are is what you do with each part:
Part 1 - goes in your rucksack for when you depart St. Jean Pied de Port.
Parts 2 & 3 - two smaller boxes inside one larger box mailed to you, Poste Restante at Burgos.
Burgos is a 12-days walk along the Camino from St. Jean. There is a post office (La Poste) in St Jean Pied de Port. Mailing from France into Spain is not difficult, but is a little more expensive than shipping from Spain to another Spanish town.
Some people carry the extra bit as far as Pamplona, then mail it from there. You can do this. Consider using a mochila / rucksack delivery service at least until you get too Pamplona to facilitate this. You do NOT want to cary extra weight over the Pyrenees.
Check with Caroline at Express Bourricot for her transportation offerings. I think you will be pleasantly surprised. Not cheap but oh so convenient. For example, for afee she MIGHT be able to delver your large box to your hotel / hostal at Pamplona, so you can mail it entirely within Spain from there to Burgos.
There are instructions here on the Forum for how to mail stuff to yourself via Poste Restante at Spanish post offices (Correos) along the Camino.
When you arrive at the Correos (post office) in Burgos, you retrieve the one large box. Open the box and place the contents of Part 2 into your rucksack to replenish what you have consumed since leaving France.
Immediately purchase another box at the counter, probably a Caya Verde Mediana. That is a medium sized "Green Box." The box costs a few Euros. Postage will be about Euro 7, depending on what you place in the box.
Place the container / box labeled “Part 3” into the new box and mail it Poste Restante to you at the Correos at Astorga. Astorga is a further 10 days down the Camino.
This is also a good opportunity to shed souvenirs you picked up along the Camino to Ivar at Santiago. Look under “Services by Ivar at Santiago” on the Forum for how to do this.
Part 3 - will be waiting for you at the Correos in Astorga. Retrieve it and replenish your rucksack supply.
As was the case at Burgos, this is also another good opportunity to shed souvenirs you picked up along the Camino to Ivar at Santiago. Again, look under “Services by Ivar at Santiago” on the Forum for how to do this.
General Points:
As you are shipping OTC medications, supplements and maybe prescription medications, across the border form France to Spain, make sure you have these items in the original containers, or as close as possible. If you are shipping wholly within Spain, you can repackage the items into the zip lock bags as discussed.
MAKE SURE YOU HAVE A LEGIBLE COPY OF YOUR PRESCRIPTIONS WITH YOU JUST-IN-CASE...
I use a recent refill label from a prescription supply bottle showing the number of refills remaining. Usually, a Spanish pharmacist will refill using this information. But this is an emergency fallback, not a reliable regular supply method.
This was a long reply. Sorry about that. But there is a lot of information here.
I hope you and others can benefit.