Therefore, if you're planning a long journey, you should always apply for the Russian visa before you leave. It's possible to get a tourist visa support at any moment before your journey, however, you can only apply for a tourist visa not earlier than 90 days before the date of your first entry to Russia.
Serotonin is a common neuromediator in the brain. It belongs to the group of so-called biogenic amines, relatively simple chemicals that facilitate the transfer of signals between the cells of the body.
Effects of MDMA on the Brain. MDMA appears to have several effects on the brain. MDMA can: 1  cause the release of the neurotransmitter called serotonin. 2  block the reuptake of serotonin by the synaptic terminal that releases it.3  deplete the amount of serotonin in the brain.pecifically, the drug damaged cells that release the neurotransmitter called serotonin. Using an imaging technique called positron emission tomography (PET), Ricaurte noted a 20-60% reduction in healthy serotonin cells in the drug users. Damage to these cells could affect a person's abilities to remember and to learn.