Is it safe for your master (pharmacist) to order the medicine from the internet?

Good morning I want to know something about the drug, in my pharmacy for 7 seven years i buy the same drug two packs in the same dose, and recently mrs. master told me that there is no this drug in two churtownia!!!??? and in another pharmacy I managed to buy these two packs of the drug without a problem, but in this other pharmacy where I bought this two packs of the drug 1 one had and for 2 the same drug waited almost a week time, in the 2nd pharmacy mr. master told me that from the internet I ordered the second pack of the drug , and I would like to know if it is safe to buy the drug in this other pharmacy in the sense that it is safe or not for your master(s) to order this medicine from the internet? is it better to wait until the pharmacy order the drug from the churtowni? and I have another question wants to buy a pressure gauge and thermometer in the pharmacy whether such a pressure gauge and thermometer have guarantees, and whether it is better to buy a pressure gauge and thermometer in the pharmacy or is it better to buy in the store? please reply.