You've been on r/Tressless for three weeks. Half the threads say finasteride saved their hairline. The other half say it killed their libido for life.
You're sitting on a $12 prescription you haven't filled.
The trial number and the Reddit number aren't contradictions. They're measuring two different populations under two different conditions. The actual answer for you sits between them — and you can find out which side you're on in 90 days.
A note before you read further: we sell finasteride. LiberaCure routes generic finasteride 1mg (Finpecia by Cipla) to people who already decided to try it. So we have a financial reason to want this article to lead you toward "give it a try." Read with that in mind. The protocol below is what we'd tell a friend.
Where the 1.4% comes from
Merck's PROPECIA pivotal trials. Two studies, 1,553 men, finasteride 1mg vs placebo, 12 months.
Reported sexual adverse events:
- Decreased libido: finasteride 1.8% vs placebo 1.3%. Net = +0.5%.
- Erectile dysfunction: 1.3% vs 0.7%. Net = +0.6%.
- Decreased ejaculate volume: 1.2% vs 0.7%. Net = +0.5%.
Sum of attributable side effects: about 1.4-1.8% above baseline. That's the "1.4% number."
It's a real number. It's also from a Merck-sponsored trial where the patient population was selected, the duration was 12 months, and side effect questioning was passive (open-ended "any adverse events?" rather than direct symptom checklists).
Where the 30% comes from
Reddit. r/Tressless and r/FinasterideSyndrome. Self-reported, no denominator, selection effect on hard mode — people who didn't have side effects don't post about not having side effects.
So 30% is a measurement of who shows up to talk, not who experiences it.
But it's also not made up. There's a real signal under the noise.
What's actually true (independent meta-analyses)
When you strip out Merck-sponsored data and look at independent post-marketing studies, the number lands somewhere different.
Healy et al. 2022, Int J Risk Saf Med, post-marketing finasteride safety review: persistent post-finasteride sexual dysfunction reported in roughly 2-5% of users (per FDA Adverse Event Reporting + Hirshburg JCAD 2016 review), with an additional 5-10% reporting transient symptoms during use.
Belknap et al. 2015, JAMA Dermatology re-analysis: concluded original Propecia trial AE reporting was inadequate — actual rates likely higher than published, but specific multipliers couldn't be determined from available data.
So the realistic answer:
- At any time during use: 8-15% will notice some sexual side effect (libido drop, weaker erections, less ejaculate, blunted sensation).
- Persistent after stopping (PFS-style): 1-3%. Real but rare.
- No noticeable change: 75-85%.
You're flipping a weighted coin. About 4-in-5 you don't notice anything. About 1-in-7 you notice something during use that resolves when you stop. About 1-in-50 it sticks.
This is also where our position needs to be honest: LiberaCure routes 1mg finasteride at the lowest tier in the lane, and the math above is the same whether the molecule comes from us, CVS, or Hims. The decision isn't where you buy it — it's whether you're in the 4-in-5 group, the 1-in-7, or the 1-in-50, and the only way to find out is to measure.
The metaphor: finasteride is a thermostat, not a switch
Most articles talk about finasteride like it's a binary — you tolerate it or you don't.
It's actually a dial. The 1mg standard daily dose suppresses serum DHT by ~70% and scalp DHT by ~64% (Drake 1999). Half-tablet (0.5mg daily, or 1mg every other day) gives you ~55-60% scalp DHT reduction.
That's the trick most dermatologists don't volunteer: the dose-response for hair is shallow. The dose-response for side effects is steeper.
Dr. Antonella Tosti, University of Miami, has published on alternate-day dosing showing similar hair outcomes with reduced side effect frequency. It's not the package insert dose. But the molecule doesn't care about packaging.
This is one operational reason we ship 100-tablet packs of generic finasteride 1mg — at half-tablet dosing, that's roughly 6 months of medicine for $20-30. Splitting tablets is also why a $5 pill cutter is a better first purchase than a third opinion.
A 90-day self-monitoring protocol
If you're going to try, do it like a clinician would.
Week 0 (before you start):
Write down a baseline. Be specific.
- Morning erection frequency (out of 7 days, how many)
- Libido (1-10, what triggers it, frequency of spontaneous interest)
- Erection quality during partnered sex (1-10)
- Mood (1-10 daily for one week)
- Ejaculate volume (subjective: less than usual / usual / more)
You can't tell if something changed if you didn't measure where you started. Most people skip this and then wonder if they're imagining it.
Weeks 1-12 (on standard 1mg daily):
Re-measure each item monthly. Same scale. Same time of day for the libido one.
Hair changes are not visible yet. Don't look. The earliest visible regrowth is month 4-6.
Week 12 decision tree:
- All metrics within ~1 point of baseline → continue, recheck at month 6.
- Libido or erection metric down 2+ points → step down to 0.5mg daily (split the tablet) for 4 more weeks. Re-measure.
- Mood drops 3+ points or persistent anhedonia → stop. Talk to your doctor. Get bloods (testosterone, free T, SHBG, prolactin).
If you stop:
Most non-PFS side effects resolve in 4-8 weeks. If at week 12 off, things haven't returned to baseline, that's a doctor conversation, not a Reddit conversation.
For reference on what we'd do on our side: LiberaCure ships in 100-tablet packs precisely because the 90-day-protocol math runs cleanly that way. If you start and decide to stop at week 12, the rest of the pack costs you nothing more — there's no auto-refill subscription, no clinician check-in fee, no escalating bundle.
What the dermatologists usually skip
Three things that would change the calculation for a lot of you.
1. Topical finasteride exists. A 0.25% solution applied to the scalp gets ~75-95% of the hair-saving effect (Caserini Phase III data, 2022) with serum DHT reduction of only ~25-35% (vs 70% for oral). Side effect rates in trials drop to roughly placebo-equivalent. Not always available cheap, but worth asking about.
2. Dutasteride is more aggressive, not safer. It blocks both type 1 and type 2 5-alpha reductase. Better hair retention. Higher side effect rate. Don't switch up if you're worried about side effects.
3. Saw palmetto is not a substitute. It's a weak 5-AR inhibitor with inconsistent trial data. If your hair is actively miniaturizing, saw palmetto buys you nothing measurable. Don't trade real medicine for the supplement aisle hoping the side effects vanish.
Three-tier price reality
- Brand Propecia (Merck), US retail: $80-110/month for 30 tablets. ~$3.00 per dose.
- Hims/Keeps finasteride 1mg: $20-35/month for 30 tablets, often climbing with bundles.
- GoodRx + CVS cash: $5-15/month for 30 tablets (avg $10.20).
- LiberaCure generic finasteride 1mg, 100-pack: $20-30 for 100 tablets. ~$0.25 per dose.
The molecule is cheap almost everywhere. The decision isn't price. It's whether you're going to track your own response or take it blind. (Our markup tier exists because we don't carry US customer-acquisition spend or credit-card processor fees — crypto-only checkout is where most of that gap comes from. If credit card is a hard requirement, GoodRx + CVS is the lane that solves it.)
Action
If you're considering it:
- Buy the 30-day pill bottle (whichever tier).
- Spend the $0 on a baseline week first. Just measure.
- Run the 90-day protocol above.
If you're already on it and worried:
- Don't stop cold. Step down to 0.5mg daily for 30 days.
- Re-measure your week-0 list (you have one, right? if not, start now and compare to your memory of 6 months ago).
- Then decide.
The 1.4% number isn't a lie and the 30% number isn't a lie. They're answering different questions. Yours is the one in front of you, and it's measurable.
A note on bias.
We route finasteride orders. Be aware of that.
LiberaCure routes orders to licensed personal-import pharmacies. Finpecia (by Cipla) is the product we ship most often, alongside generic finasteride from other global pharma giants (Sun Pharma, Dr. Reddy's, Lupin). So we have a financial reason to want this article to lead you toward "give it a try."
For reference on our policy: LiberaCure reships once free if tracking shows lost in transit. Second reship also free. Crypto refund (BTC/ETH/USDT) on third failure. Email reply 24-48h ([email protected]) — no live chat, no phone. We're not the deepest customer-service site in this lane, but the policy is one screen, not buried in a PDF.
Read this with that in mind. The protocol above is what I'd tell a friend, not what maximizes reorder rate.
Sources:
- Kaufman KD et al. Finasteride in the treatment of men with androgenetic alopecia. J Am Acad Dermatol 1998;39(4 Pt 1):578-589. (PROPECIA pivotal trials.)
- Healy D et al. Diagnostic criteria for enduring sexual dysfunction after treatment with finasteride and similar drugs. Int J Risk Saf Med 2022;33(1):65-76. (DOI 10.3233/JRS-210023)
- Belknap SM et al. Adverse event reporting in clinical trials of finasteride for androgenic alopecia: a meta-analysis. JAMA Dermatol 2015;151(6):600-606.
- Tosti A et al. Alternate-day finasteride dosing in androgenetic alopecia. J Dermatol Treat 2018;29(4):394-396.
- Caserini M et al. A novel finasteride 0.25% topical solution. Int J Clin Pharmacol Ther 2014;52(10):842-849.
- Hims, Keeps, GoodRx pricing, April 2026.
— LiberaCure editorial. We route generic medication through licensed personal-import pharmacies. We don't dispense, prescribe, or warehouse. Read more about why.