**The medications used to do the stress test may not work if you have caffeine or decaffeinated products, or theophylline or dipyridamole and you may get an inaccurate test result.**. If you forget & do have caffeine the day before the test, please call 303-270-2670. Ask to speak to someone regarding the use of caffeine and your stress test. **. Other medications you may be asked to hold before the test are beta blockers, calcium channel blockers or nitrate products.
By the meteorological calendar, spring starts on 1 March. The seasons are defined as spring (March, April, May), summer (June, July, August), autumn (September, October, November) and winter (December, January, February). The astronomical spring begins on 20 March 2017 and ends on 20 June 2017.
Answer by 18hyndil. Confidence votes 63. Spring starts on the Vernal Equinox, which is usually around March 20th in the Northern Hemisphere and September 21st in the Southern Hemisphere. Spring ends on the summer solstice, which is around June 21st and December 21st in the North and Southern Hemispheres respectively.