swallow syringe content risk

Hello, first time for me writing here so excuse me if I do something wrong.

I have a read a lot of questions and answers here and my question is perhaps strange. Two years ago a former party friend visited me and he has started shooting amphetamine.
I am not there as I prefer to snort or drop it orally. He left my house but on my table was a syringe (no needle) 'ready-made' : water mixed with amphetamine to be excact.
End of story is that i drank it, swallowed the content. My worry is: what if that syringe had been used before? Is there a risk of getting HIV this way?

If so; how can kissing be any safer? How can it be 'advised' and regarded as safe, some people got some sores in there mouths (MANY kisses everyday worldwide to take into account)

Also the mixture of amphetamine and water would kill any virus plus the fact that the saliva and substances in the mouth would protect?

Thanks for answer.

[THUNDERROAD71]

You never had an hiv risk from what you describe because hiv is unable to reproduce outside it,s living host,it becomes inactive and therefore unable to infect.Kissing is zero risk for hiv transmission because saliva contains protiens and enzymes that render the virus inactive aswell,mouth sores or not it makes no difference.You would have only been at risk if you shared iv drug works with him which you did not.Your safe.