H501

H 501blank on other side

I found a pill with H 501 on one side blank on the other side unable to identify please help ## I found a pill imprinted with H501 on one side blank on the other its white and oblong haven't been able to identify it any help is greatly appreciated :-) ## Hello again, Kitty! I hope you are doing well! I've done more searching, but I still can't find anything that matches this description. What is your general location? If it's an over the counter product, some of those are regional, so that information could help to narrow it down. Is there a chance that it may be a foreign medication? ## I'm not sure if its foreign I found it and my location is Washington state

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