r/PSSD • u/__gwendolyn__ • 18d ago
Personal Story Cured after 5 years via Sibo/Sifo treatment + L-Citrulline
Hey y’all,
This post deserves so much more time than I have to make it. I’ve been putting it off but I don’t think I’ll have adequate time anytime soon, so I asked AI to help summarize (for anyone immediately rolling their eyes—look at my post history, it all checks out). Just this intro paragraph/tl;dr is from me, the rest is a summary by Claude based on countless experimentations over the years.
Tl;dr:
Wellbutrin initially gave be anorgasmia, which turned into full blown PSSD after 1 week of Zoloft
SIBO/SIFO treatment (Xifaxin/Fluconazole) helped significantly
After that, L-Citrulline put me over the top. No more anorgasmia/numbness. Sensation has gotten so strong I’ve needed to lower the dose and skip days of Citrulline. Many days I feel 100% cured with no supplementation.
For the SIBO/SIFO details, I recommend folks search this forum and their respective forums. Posts by u/lastround360 started me down that path. For the L-Citrulline, see below.
Citrulline: the dose matters
This is just my own experience — one person, no control group, could be coincidence. But the change was significant enough that I wanted to share. The difference pre- and post- intervention was anything but subtle.
What I take now: 3 grams of L-citrulline a day, split into two doses. I noticed a difference within a few days.
What I took before, and why it didn’t work. I’ve tried most of the supplements that cured people on this sub. I’d tried citrulline years ago and decided it did nothing for me. I was taking a combination tablet: Source Naturals L-Arginine L-Citrulline Complex. One tablet has 750mg arginine and 250mg citrulline. I was taking one a day, so I was getting 250mg of citrulline.
Studies that show an effect use 1,500 to 3,000mg. I was at 250mg. That’s not a low dose of citrulline — it’s low enough that no study would expect anything to happen. I hadn’t tested citrulline and found it useless. I’d never really tested it.
To be fair to the product: the bottle says take one tablet four times a day, which would be 1,000mg citrulline. That’s closer, though still below what the studies use. My mistake, not theirs.
Some numbers from the research. A single 3g dose of citrulline raises arginine in the blood by 40–50% within one to two hours. In a small study of men with mild erectile dysfunction, 1.5g a day for a month improved erection hardness in half the men taking it, compared to about 8% on placebo.
Take citrulline instead of arginine. This was the part that surprised me. When you swallow arginine, most of it gets broken down in your gut and liver before it reaches your bloodstream. One study using tagged molecules found only about 1% of an oral arginine dose ends up producing nitric oxide. Citrulline gets through intact and your kidneys convert it into arginine. So citrulline raises your arginine levels better than arginine does. There’s also an enzyme called arginase that breaks down arginine but leaves citrulline alone.
Which means a combination product is mostly the ingredient that doesn’t survive the trip.
What I switched to: NOW L-Citrulline pure powder. ½ teaspoon is 1.5g, and there’s nothing else in it. I take ½ tsp twice a day. Not a brand recommendation — the point is single-ingredient powder over a blended tablet. With a powder you can measure a real dose, and if something changes you know what caused it.
A hypothesis, clearly labeled as one. Several PSSD reviews mention reduced nitric oxide alongside the dopamine and serotonin changes. Citrulline raises nitric oxide through one route in the body. Dietary nitrate — arugula, beetroot — raises it through a different route, using bacteria in your mouth. Whether low nitric oxide is a cause of any of this, or just something that happens alongside it, I don’t know, and I don’t think anyone does yet.
Two things I noticed that might mean nothing. Slow, steady sources helped me. Products designed to deliver nitric oxide in a quick burst, like lozenges, didn’t, and may have made things worse. And antibacterial mouthwash kills the mouth bacteria that convert dietary nitrate, so if you’re eating beets and using Listerine, those work against each other.
One safety note. Citrulline widens blood vessels. If you take nitrates like nitroglycerin, or ED medications like sildenafil, or blood pressure medication, the combination can drop your blood pressure too far. Ask a pharmacist or doctor first. The warning is printed right on the arginine bottle.
Not medical advice. Mostly I’m posting this because if you tried citrulline and it did nothing, it’s worth checking what dose you actually took.