Regular dried Salvia divinorum has to be smoked, but the extracts like 10x, 20x, 30x and so on, contain enough active components to be active through the oral mucosa.
Smoking
The dried extracts are best when used in a bong or glas pipe. The effects start immediately after the smoke is inhaled and they last for 60-90 seconds. Therefor, the amount you want to consume should be taken in one hit, this is why a joint or similar is not recommended.
For best results, a torch lighter can be used, it creates a much higher heat and the active components are released much faster. This makes it easier to take all in one hit.
Sublingual
Take the amount you want and chew it slowly. The emerging juice and the extract is kept under the tongue or evenly spread in the mouth. The effects start after 5 minutes, peak is reached after about 10 minutes and starts to decrease slowly within 30-45 minutes.
Dosagem
The recommended dosage varies from extract to extract. For example, if the extract is a 15x extract, it just means the extract is 15 times stronger than the leaves it was made with. But it does not tell you how strong the leaves are which had been used for extraction. This means you will have to test low dosages first, every time you change the extract you use or the brand.
For smoking, often 30-60 mg of the dried extract is enough to create very strong psychedelic effects.
For sublingual consumption, more extract is
required. In most cases double the smoking amount is enough. But this consumption technique is different from smoking, so again the amount varies from person to person. Here too, testing low dosages first is recommended.