Is anyone having trouble getting any brand of riluzole other than Glentek. Have been trying for a week. We are on second chemist who are trying for a second time with a different supplier. First chemist tried three times but the suppliers kept sending Glenteck. Steve had been having trouble with that brand with numbness and tingling in the mouth. We had been able to get other brands for the last few months. Keep being told they are in short supply. Hopefully will get some on Tuesday. Also apparently Glentek are the cheapest!