Hi!
You may find our first aid kit link below helpful.
Don't keep too much at home in terms of support products with a shorter shelf life and rather get them fresh in an emergency. I find mushed pellets and 'poo soup' (or gut microbiome water for a politer expression) from a healthy companion perfectly servicable to bridge the initial gap in an emergency. Probiotics are in any pet shop and can be got fresh when needed, and recovery formula can be got from online with next day delivery. Many UK vets have a pouch of recovery food if you ask.
What is useful is spare syringes, extra grids for an hospital corner, some vet bed pads for the hospital corner in case of an emergency operation. What do you mean with 'beaphar'; the probiotic? It is a company that produces a number of mostly low dosed pet shop products.
Again, tear drops you can get from a pharmacy or supermarket. Unless you have plenty of piggies and are dealing regularly with hay pokes, it is better to get it fresh if possible. You are fine if you complain at the pharmacy about waking up rubbing your dry eyes at night - the gel is longer lasting, so better for this situation. Pharmacies won't sell human medication for use in animals unless it is a vet's prescription.
I had one year with 8 hay pokes (a couple of them rather nasty) but then hardly any in the last couple of years...
You can find plenty of first aid tips in here:
First Aid Kit: Easily available non-medication support products for an emergency