High dosages taken to induce recreational drug effects may lead to overdoses. The dosages for escitalopram are typically 1/2 of those for citalopram. Patients on high dosages of oral steroids should closely monitor their GI health. These trials are important in determining dosages and safety of the drugs in study. Progestogens have relatively few side effects at typical dosages. The FDA has classified the side effects into groups based on dosages levels at q4h. Extremely high concentrations of equilin are produced by typical clinical dosages of CEEs. The efficacy and side effects of different dosages is often a point of disagreement. Studies show variability in the symptom improvement, appropriate dosages, and efficacy in this population. Lower dosages of EE also have significant antigonadotropic effects. At typical clinical dosages in women, the androgenic effects of tibolone are weak. The ACE inhibitors have different strengths with different starting dosages. As of August 2014, Endo International produces Percocet in the following dosages. When exceeding approved dosages, dextromethorphan acts as a dissociative hallucinogen. Lethal dosages for other species are below.