40 years ago -not common. Today, more common, (sadly) but that doesn't mean it is normal. I disagree with the poster who said bedwetting is normal up to 7 yrs old. An occasional accident in a limited amount of time could be considered nothing to worry about but repeated incidences, especially in a child who has been consistently dry - should always be suspect. My two girls were dry, completely, at night by 3....my son was a bedwetter.
I have done medical research for 12 years, and anytime I see bedwetting in children I immediately consider alkalosis or diabetes. What you should know is that fluticasone is a steriod. Any drug ending in "sone" is. That spells trouble and here is why.
Steroids are hormones which affect blood sugar, muscle mass, growth, bone density, sleep cycles,blood thickness, mineral absorption, acid levels in the stomach, and more. Excess steroids cause the body to switch to an alkaline state- where electrolytes get out of balance....the sodium goes up and the potassium goes down. Other symptoms are swelling ,* especially the belly or face*, *high blood sugar* which causes excessive urination/ especially at night (ie: diabetes), *confusion* or *drowsyness* wanting to sleep excessively in daytime or not feeling rested even after napping during day, asthma, nausea, excess hunger, excess thirst* chronic fatigue, weakened muscles (due to the low potassium) skin issues (cracking, dry, flaking, rashes, hives),allergies, teeth grinding, lowered immune system = more infections which last longer. Steroids can be very dangerous for children because they affect growth hormones and future sex hormones.
Infants/toddlers who are given steroidal breathing treatments are more likely to be bedwetters and more prone to diabetes and allergies/hayfever..
Eventually people in high steroid states can get diseases like chrones , colitis, migraines, PMS, cataracts, osteoporosis, arhtritis, fibromyalgia, neuropathy,ulcers, GERD, glaucoma, kidney disease , heart disease, blood clots and thick blood, impotence, hair loss, thyroid problems, yeast infections, celiacs, recurring sinus infections, depression and bipolar, memory loss /alzheimers, cancer / tumor growth, and specific thyroid disorders and more that I cant even think of right now.
The drug your child is taking is affecting his blood sugar and is the cause of the bedwetting. I would get him off of asap. If you want to do more research on high steroid states, look up Cushings Syndrome and Conns syndrome. You can also do a search on 'high cortisol or high steroids affect on blood sugars'.