There have been a variety of shortages of all kinds of medicines and often things can change rapidly. Have you phoned around other local pharmacies to see if they have the brand that you prefer? Independent pharmacies are often the best bet to try as they aren't tied to one source for their stock.
Supplies can be very patchy at times. People in area 1 might be able to get a medicine whereas those in area 2 might not. This was happening with various brands of liquid Levo and still is even.
If your pharmacy can't get it then get on the phone and start calling round chemists in the area.
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