The toxic effect is related linearly through a relatively large range of body weights, to the body weight of the victim, and, The mechanism of toxicity is the same for âsimilar animalsâ, i. e. one may conduct toxicity tests on say rats or mice and apply the LD50 data to human, since both are mammals.
For moderate menstrual cramps, the nonsteroidal anti-inflammatory drugs (NSAIDs, such as ibuprofen [Advil, Motrin, Nuprin, etc.] or naproxen [Aleve, Anaprox, Naprosyn, Naprelan]) are often helpful.
1 Anxiety and stress can make cramps worse. 2  Talk to your doctor about your birth control choices. 3  IUDs cause cramps and excessive bleeding. 4  And the Pill can relieve symptoms: It lessens cramps and flow, shortens the length of the period, and makes a menstrual period regular.