what are some side-effects of the latter?
Decreased respiratory effort and low blood pressure
Morphine
Potentially serious side effects of morphine include decreased respiratory effort and low blood pressure. 
what is the distinctive feature of the feet of a frog? Many frogs have webbed feet and the degree of webbing is directly proportional to the amount of time the species spends in the water do they have a scientific name? UNANSWERABLE in what way is it associated with pharmaceuticals? The alkaloid epibatidine, a painkiller 200 times more potent than morphine, is made by some species of poison dart frogs
wiki:25642715
Morphine [SEP] Introduction
Long-acting formulations of morphine also exist. Potentially serious side effects of morphine include decreased respiratory effort and low blood pressure. Morphine is addictive and prone to abuse. If one's dose is reduced after long-term use, opioid withdrawal symptoms may occur. Common side effects of morphine include drowsiness, vomiting, and constipation. Caution is advised for use of morphine during pregnancy or breast feeding, as it may affect the health of the baby. Morphine was first isolated between 1803 and 1805 by German pharmacist Friedrich Sertürner. This is generally believed to be the first isolation of an active ingredient from a plant.