In swallowing, one portion is volunatary and one part is involuntary. â¢ Buccal phase o Voluntary contraction of the tongue o Step 1 in figure â¢ Pharyngeal-esophageal phase o Involuntary o Control center in the medulla and lower pon o Step 2-5 in figure.
Considerations. Serotonin is a mood regulator that occurs naturally in the body. When serotonin levels are chemically altered, as they are with the use of diet supplements such as Phentermine, a chemical imbalance occurs that may lead to feelings of anxiety or depression.
The appetite suppression effects of phentermine are greatest during the initial two weeks of therapy, according to the NIH website. The exact reason for this, or even for how phentermine suppresses appetite, is unclear. Phentermine does cause altered taste sensations, constipation and dry mouth. These symptoms, along with anxiety and an increased metabolic consumption rate, may lead to loss of appetite and thus, weight loss.