High tea. Literally!
There is not a standard strength for poppy seeds, so some may be more powerful than others. When you are preparing and drinking poppy seed tea for the first time, err strongly on the side of caution in terms of how many seeds you use. If you do not notice any effects, try using more seeds in the future. Again, you should not be using poppy seed tea on a regular basis, as it has proven addictive qualities.
Lemon juice, added to the tea, helps to increase the potency by changing the
acidity component of the seeds. It also helps to release more of the active ingredients into the water.