Almost 10 years after diagnosis I find that constipation is for me the worst of the symptoms of PD, with on average a day a week wasted trying to poo.
Movicol makes a difference, as does drinking more. Ideally these should be taken/done on a regular basis to stop the problem developing in the first place. But, what if you have a problem: you feel the urge to poo, and have sat on the toilet for a hour and nothing will come out?
First, even at this late stage I find it useful to take Movicol and to drink, especially orange juice. But these together take hours to have an effect on me.
Enemas are appealing, but the advice from the National Parkinson's Foundation is that they should be avoided if at all possible. That said, straining for hours is probably not good for you either.
I've not found anywhere in the UK to buy enema kits. So, I make my own. This is how:
I've only used water enemas, taking in about a pint in each session. This is delivered using a 4 pint cleaned, plastic milk bottle (it must be flexible to allow it to contract and have a hole for a handle) and a windscreen washer tube (3.2mm internal diameter, 2.4m long, available at Halfords for about £2). Drill a hole in the cap about 0.5mm smaller than the outside diameter of the tube. Push the tube through the hole, until the tube nearly reaches the bottom of the bottle. Fill the bottle with water. Screw in the cap. Invert the bottle and wait for the water to flow out of the end of the tube. This primes the syphon. Now turn the bottle the right way up and suspend from e.g. a step ladder. The moment I fell some discomfort, after about a pint, I go to the toilet. Note: a 4 pint bottle is used because it has the right shape, it is not intended to use all the water.