One low dose (baby) aspirin daily has been shown to reduce the risk of heart attack and stroke.  It works as a blood thinner. 

Aspirin in higher doses may have side effects, including preventing blood clotting necessary to heal wounds, and aspirin may cause unwanted bleeding.

We want our blood to circulate as well as possible, and low dose aspirin may help some of us.  I would suggest consulting your doctor before starting any aspirin regimen.

Okay, an update.

I came across a recent study that suggested that twelve sessions twice per week can provide more benefit than a six session cycle:
https://pubmed.ncbi.nlm.nih.gov/31474753/
The same study also compared different energies, concluding that a density higher than I most recently used achieved better results.

Reminder: I have used a large applicator so the energy is spread over a bigger area than the smaller applicators that most guys use.  This means I get a lower energy density at any given energy level setting than provided by smaller applicators.  But I am also getting a greater total hit of energy at any given energy density.

In prior posts I reported that after overdoing it a year ago and cutting way back, each round I boosted the number of shocks and energy level a bit.  My very first round of six treatments in June 2019 used 90mJ and worked okay.  My round in March 2020 used 75 mJ, was helpful and caused no damage. A difference between that first round and the March 2020 round is that after completion of the first round there was a bit more inflammation that persisted for a week or so.

My opinion is that inflammation - the tissue tends to stay warm and feels more spongy - provides physical evidence that you've done enough.  But this is tricky because while some inflammation is a positive signal, too much will definitely cause a setback.  My subjective opinion is that too many shocks in a single location triggers damage, even if the session has a relatively low number of total shocks. 

Conversely, my experience is the total number of shocks, and the energy density used can be safely boosted if more locations are used with fewer shocks per location. The wait time between sessions also makes a difference.  If you do sessions two days in a row it's probably not much different than doing two sessions on the same day.  The risk goes way up.

The sweet spots I've arrived at with my machine and applicator (41mm diameter) seem to

I've run across a couple of studies that used SW for Peyronies.  The conclusions were that SW did not provide much benefit, sorry to report. 

I've also run across a traction device that claims to treat Peyronies by applying tension directly on the affected part of the penis.  I have no experience with it, so I have no basis for an opinion.  The device expensive as traction devices go, ($500). but it apparently went through some clinical testing at the Mayo Clinic.  At that price I would recommend careful due diligence before purchase.  For what it's worth, you can check it out here: https://www.restorex.com/
 

Success rate here?  It's hard to tell.  My guess is more than half of us, but not by a lot.  In studies the success rate has been around 60 - 70% if I recall correctly.  The studies tend to cherry pick by limiting inclusion criteria so they select guys most likely to benefit.

Basically most of the studies exclude guys like these:  If you have had ED for a long time, you are less likely to benefit.  If you have diabetes you are less likely to benefit.  If the source of your ED is something other than blood flow-related, you are less likely to benefit.  If you are morbidly obese, you are less likely to benefit.

For guys with profiles like those above, the success rate is very low.

From what I can tell, guys most likely to benefit resemble my profile: Willing to work on factors under their control such as mild hypertension, a few extra pounds, work-related or other stress.  I've cleaned up lifestyle related issues, and with the SW therapy made significant improvements.

Yes, it is possible to injure yourself with these machines.  I feel it important to learn as much as you can before you start to use one.  But if used with discipline, it can be helpful for men whose ED is associated with vascular insufficiency.

The machines are "Class 2" medical devices.  This lumps them together with powered wheelchairs, pregnancy testing kits among other things.  There is risk if they are used improperly.  Education may be required to use the device safely or to achieve the intended outcome.  "Class 3" devices are things like heart pacemakers that are inherently risky.

The closest comparison to shock waves I can think of is this:  Wrap your penis with cloth. Place a towel on a table and have your penis rest on it. Now tap your penis with a rubber mallet.  If you tap it gently there is no harm.  But if you hit it hard enough, bad things will happen.

What happens if you tap firmly - but not to the point of any pain or injury - 2,000 times?  (I don't suggest trying this!) Shockwaves provide a tap, but not a physical tap. I have to say it feels physical.  The theory is that this stimulates angiogenesis - growth of blood vessels - leading to better blood flow.

I've had a machine for almost a year.  I've done a total of seven rounds of treatment, mostly following a protocol of 6 treatments per round, 2 sessions per week. With my second round I was too aggressive, and progress was set back.  Since then it has been an upward trajectory.  There is clear improvement, and no harm.

As we get older we can no longer get away with mediocre health habits.  One way this shows up is with ED.  So using shockwave therapy in conjunction with improved diet, exercise, sleep and limiting stress as much as possible is likely to improve results.

Good luck!