Early and continued participation in physical, occupational (related to the development of fine-motor control skills), and communication (speech) therapies are believed to significantly improve the prognosis (in the areas of cognition and communication) of individuals affected by AS. Further, the specific genetic mechanism underlying the condition is thought to correlate to the general prognosis of the affected person. On one end of the spectrum, a mutation to the UBE3A gene is thought to correlate to the least affected, whereas larger deletions on chromosome 15 are thought to correspond to the most affected.The clinical features of Angelman syndrome alter with age. As adulthood approaches, hyperactivity and poor sleep patterns improve. The seizures decrease in frequency and often cease altogether and the EEG abnormalities are less obvious. Medication is typically advisable to those with seizure disorders. Often overlooked is the contribution of the poor sleep patterns to the frequency and/or severity of the seizures. Medication may be worthwhile to help deal with this issue and improve the prognosis with respect to seizures and sleep. Also noteworthy are the reports that the frequency and severity of seizures temporarily escalate in pubescent Angelman syndrome girls, but do not seem to affect long-term health.The facial features remain recognizable with age, but many adults with AS look remarkably youthful for their age.Puberty and menstruation begin at around the average age.
Therefore it should be stored in the dark.There are no known carcinogenic and mutagenic effects. It has a moderate toxicity according to the Chemwatch hazard ratings. First aid measures
First aid measures:

Effects on organisms
Sulfonamides are generally effective against most gram-positive and many gram-negative organisms. Specifically enteric bacteria and other eubacteria are affected by the antibiotic as it kills the bacteria by restricting the production of folic acid, which is essential for their growth. However strains of bacteria can be resistant to the antibiotic. If a bacterium is resistant to a sulfonamide, it is resistant to all the forms. Furthermore, sulfacetamide is toxic to soil organisms. Synthesis
Sulfacetamide is synthesized either by direct alkylation of acetamide with 4-aminobenzenesulfonyl chloride, or by reacting  4-aminobenzenesulfonamide with acetic anhydride and subsequent selective, reductive deacylation of the resultant acetamide using a system of zinc-sodium hydroxide. == References ==