If a plate with oceanic lithosphere meets another plate, the dense oceanic lithosphere dives beneath the other plate and sinks into the mantle: this process is called subduction. The sinking oceanic lithosphere drags the rest of the tectonic plate: this is the main cause of plate motion.
You may notice a decrease in symptoms during the build-up phase, but it may take as long as 12 months on the maintenance dose to notice an improvement. If allergy shots are successful, maintenance treatment is generally continued for three to five years.
Local Side Effects. The most common side effects of allergy shots occur at the injection site, because the allergy shots contain a small amount of the allergens specific to a patient. Redness, swelling and itch can begin immediately or within a few minutes of the allergy shot.