Research in positive psychology, well-being, eudaimonia and happiness, and the theories of Diener, Ryff, Keyes and Seligman cover a broad range of topics including "the biological, personal, relational, institutional, cultural, and global dimensions of life".  A meta-analysis on 49 studies in 2009 showed that Positive Psychology Interventions (PPI) produced improvements in well-being and lower depression levels, the PPIs studied included writing gratitude letters, learning optimistic thinking, replaying positive life experiences and socializing with others.  In a later meta-analysis of 39 studies with 6,139 participants in 2012, the outcomes were positive. Three to six months after a PPI the effects for subjective well-being and psychological well-being were still significant. However the positive effect was weaker than in the 2009 meta analysis, the authors concluded that this was because they only used higher quality studies. The PPIs they considered included counting blessings, kindness practices, making personal goals, showing gratitude and focusing on personal strengths. 
When we think of the word “positive,” most of us probably think “happy.” However, happiness isn’t the only type of positivity. There are many ways to be more positive in your life, even when you’re experiencing sadness, anger, or challenges.  Research suggests that we have powerful capabilities to choose positive emotions and ways of thinking.  In fact, our emotions literally change our bodies on a cellular level.  Many of our experiences in life are a result of how we interpret and respond to our surroundings. Fortunately, rather than repressing or trying to “get rid” of negative feelings, we can choose to interpret and respond to them differently.  You’ll find that with some practice, patience, and perseverance, you can become more positive.
After oral administration, the onset of the antisecretory effect of Omeprazole occurs within one hour, with the maximum effect occurring within two hours. Inhibition of secretion is about 50% of maximum at 24 hours and the duration of inhibition lasts up to 72 hours. The antisecretory effect thus lasts far longer than would be expected from the very short (less than one hour) plasma half-life, apparently due to prolonged binding to the parietal H + /K + ATPase enzyme. When the drug is discontinued, secretory activity returns gradually, over 3 to 5 days. The inhibitory effect of Omeprazole on acid secretion increases with repeated once-daily dosing, reaching a plateau after four days.