I take Citalopram 40mg. They've gone through a couple different shapes/lettering over the years I've been on it, and my most recent Rx is very different from the last. Last was round and white. Today it is oblong/oval white tablet with only "4742" on it. I've been able to find ones that also have 93 on side two, but my side two is blank. Only writing is "4742" and I can't find this pill anywhere on the internet. Please help? Is this safe to take? Is it really Citalopram 40mg? I don't want to miss a dose and the pharmacy is closed. Thank you for your time.