I've ordered about 5 bottles in 3 separate orders over the span of about 1 1/2 years.
I have used 3 full bottles, currently researching with bottle #4 that was bought about 1 1/2 months ago. Bottle #5 is still sealed, but was purchased at the same time as #4.

No issues at all, always worked well my research. I usually use a 30mg dose for my research, which keeps it's effects for up to 72 hours.

I've also done a 5mg daily research dose. I had to lock up the male rat in a steel cage.

For erections lasting over 4 hours, immediately seek a vagina.