Xeno Labs Finasteride – 5mg/50tabs

Recommended Dosage for Male:
1mg daily for hair loss prevention. Take one tablet at the same time every day with or without food. Some guys take 0.5mg daily (half tablet) to reduce side effect risk while still getting DHT reduction.

For Prostate Issues:
5mg daily is the medical dose for enlarged prostate (BPH). This is not typically used by bodybuilders unless prescribed for prostate health.

When to Take:
Take at the same time every day to maintain steady DHT suppression. Morning or evening doesn't matter - just be consistent.

How Long to Use:
Finasteride works as long as you take it. If you stop, the benefits disappear within 6-12 months and hair loss resumes. Most guys take it continuously for years if they want to keep their hair.

Important Timing:
It takes 3-6 months to see if it's working for you. Hair growth is slow. Don't expect results in a few weeks. After 12 months you'll know the full benefit.

Missing Doses:
If you miss a day, just take your next dose as normal. Don't double up. Missing occasional doses isn't a big deal since DHT stays suppressed for a while.

Sexual Side Effects (Most Important):

• Decreased sex drive (1.8% of users in studies)
• Erectile dysfunction (1.3% of users)
• Less semen volume when ejaculating (1.2% of users)
• These can persist after stopping in rare cases (post-finasteride syndrome)

Other Side Effects:

• Depression or mood changes in some men
• Breast tenderness or enlargement (rare)
• Testicular pain (rare)
• Brain fog or cognitive issues (rare)

Critical Warning:
Some men develop persistent sexual dysfunction that continues even after stopping finasteride. This is controversial but documented. If you experience sexual side effects, consider stopping and consulting a doctor.

During Steroid Cycles:
Your testosterone levels are already high from steroids, which may reduce sexual side effects since finasteride only blocks DHT, not testosterone. However, DHT plays a role in libido and sexual function, so sides are still possible.

Active Ingredient:
Finasteride

Dosage Strength:
1 mg per tablet (standard dose for androgenetic alopecia/hair loss)

Quantity:
Varies by packaging (typically 30, 60, or 90 tablets per bottle)

Intended Use:
Primary FDA-approved uses:

• 1mg daily for male pattern baldness (androgenetic alopecia)
• 5mg daily for benign prostatic hyperplasia (enlarged prostate)

Primary bodybuilding use: Preventing hair loss during steroid cycles, blocking DHT from testosterone and other androgens

Mechanism of Action:
Competitive and specific inhibitor of Type II 5α-reductase enzyme. This enzyme converts testosterone into dihydrotestosterone (DHT) in hair follicles, prostate, and other tissues. By blocking this enzyme, finasteride reduces DHT levels by approximately 65-70% systemically.

Half-Life:
5-6 hours in men ages 18-60
8 hours in men over 70

Time to Steady State:
Approximately 7 days of daily dosing

Pharmacodynamics:

• Produces 65% suppression of serum DHT within 24 hours of first 1mg dose
• Scalp DHT levels reduced by 60-75%
• Circulating testosterone and estradiol increase by approximately 15% (remain within normal physiologic range)
• No direct effect on androgen receptors

Bioavailability:
63% oral absorption (range 26-170% due to individual variation)

Active Life:
DHT suppression continues for several days after stopping due to slow enzyme complex turnover (approximately 30 days for Type II enzyme)

Protein Binding:
Approximately 90% bound to plasma proteins

Metabolism:
Extensively metabolized in liver via CYP3A4 enzyme system

Excretion:
57% excreted in feces as metabolites
39% excreted in urine as metabolites

Molecular Formula:
C23H36N2O2

Molecular Weight:
372.55 g/mol

Detection Time:
Not typically tested in drug screenings (not a banned substance in most sports)

Administration:
Oral tablet, swallow whole with water. Can be taken with or without food.

Storage:
Store at room temperature 59-86°F (15-30°C). Protect from light and moisture. Keep in original container. Keep away from pregnant women and children.

Special Warnings:

• Pregnant women must not touch crushed or broken tablets - finasteride can cause birth defects in male fetuses
• Decreases PSA (prostate specific antigen) levels by approximately 50% - inform doctor before prostate cancer screening
• Not for use by women or children

Also Known As:
Propecia (brand name for 1mg), Proscar (brand name for 5mg), Fin