Give Propecia 1 mg three months before you judge the vertex

Three months is the earliest honest checkpoint

Daily use for three months is the earliest labelled checkpoint, not a week of staring at the shower drain. The US Propecia insert says one 1 mg tablet once a day, with or without food. Benefit, in general, needs daily use for three months or more before anyone should call the tablet a success or a waste.

I tell men in the mailbag to photograph the crown in the same light on day one. Then leave the camera alone until month three. Month-to-month guessing is how people quit a drug that has not had time to move a follicle cycle.

The labelled studies enrolled men 18 to 41 with mild to moderate loss at the vertex or the anterior mid-scalp, not a fully bare dome. If the hairline has already receded to a shine, this tablet is a weak rescue. It is better at holding what is still there. The questions that come after the first shed live in the hair-loss note.

A short burst of shedding in the first months shows up in a lot of reader mail. The insert does not list a shed as a trial endpoint. Follicles that were already leaving can empty while a new cycle starts. That feels like failure. It is not a reason to stop at week six.

Give the 1 mg tablet a full three months before you judge the vertex. Twelve months is a fairer look at whether the crown thickened. Stopping later hands the ground back. The US label says withdrawal reverses the effect within 12 months. This is a daily hold, not a course you finish. If that bargain is unacceptable, do not start.

A rising PSA on this tablet still counts

Any confirmed PSA rise on Propecia may signal prostate cancer and should be evaluated, even if the number still looks 'normal' for a man who is not on a 5-alpha-reductase inhibitor. That is the warning, not a rumor. Missed tablets also scramble the reading. Say so on the form.

UK product information tells labs to consider doubling a PSA drawn on Propecia before they interpret it. The US insert is less formulaic and more stubborn: a confirmed increase from the lowest on-drug value is the flag. I write both into the mail when a man is old enough for screening.

In the hair-loss studies, mean PSA in men 18 to 41 fell from 0.7 ng/mL at baseline to 0.5 ng/mL at month 12. That is a small absolute drop in a young cohort. The same chemistry in older men on the 5 mg pack halves a higher starting PSA. Either way, the rule is the same: tell whoever orders the test.

The 5 mg Prostate Cancer Prevention Trial found more Gleason 8-10 cancers on finasteride than on placebo (1.8 percent versus 1.1 percent). Dutasteride showed a similar high-grade signal. The 1 mg hair pack is not that trial. The class warning still sits on the Propecia insert. Screening does not get skipped because the tablet is 'only for hair.'

Broken tablets stay off pregnant hands

Women who may be pregnant must not take this drug. Propecia is not indicated in women or in children. Finasteride blocks the DHT a male fetus needs for normal external genitalia. Animal work showed abnormal development. The US insert keeps pregnancy as a contraindication.

Women who are or may become pregnant must not handle crushed or broken tablets. The powder can go through skin. That warning is why this note refuses the home split of a 5 mg Proscar tablet. Splitting strips the coat and leaves powder on a knife. The labelled hair pack is already 1 mg and coated.

Intact film-coated tablets are the handling rule. The coating keeps the powder in. If a tablet cracks, a pregnant person should not pick up the pieces. Soap and water on the skin if contact happens. Then call the clinician who is following the pregnancy.

Men trying to conceive are not told to stop 1 mg on semen grounds in the labelled exposure math. That is not a license to ignore the handling rule in a shared bathroom. Keep the bottle closed. Do not crush tablets to share or to 'make a topical.' Powder on a razor blade is how the pregnancy warning becomes a household problem.

If skin contact happens, wash with soap and water and tell the clinician following the pregnancy. Intact tablets in a closed bottle are the ordinary rule. I would rather write the coated 1 mg pack than invent a cut-up 5 mg workaround for cost.

The tablet clears in hours; the enzyme stays down

Mean bioavailability in 15 young men was 65 percent, with a wide range (26 to 170 percent) against an IV reference. Food did not change that. At steady state on 1 mg daily, peak plasma averaged 9.2 ng/mL at 1 to 2 hours. AUC over 24 hours averaged 53 ng·hr/mL.

Mean terminal half-life is about 5 to 6 hours in men 18 to 60, and about 8 hours after age 70. First-dose half-life in the young-man table was 4.5 hours. The short plasma life is not the clinical clock. Enzyme blockade outlasts the blood level, which is why once daily covers a full day of DHT suppression.

About 90 percent of circulating drug is protein-bound. Volume of distribution averaged 76 liters. Clearance averaged 165 mL/min. After an oral carbon-14 dose, 39 percent of metabolites left in urine and 57 percent in feces. Renal impairment did not need a dose change in the labelled work. Metabolites shifted toward stool.

Semen levels were measured in 35 men on 1 mg daily for six weeks. In 21 of 35 samples the drug was undetectable (under 0.2 ng/mL). The highest level was 1.52 ng/mL. Even assuming full vaginal absorption from 5 mL of semen a day, that exposure was 650-fold below a 5 microgram dose that did not change circulating DHT in men.

A thirty-count 1 mg strip is what this page prices

Cost Plus lists a thirty-count 1 mg strip if that warehouse stocks it. Amazon Pharmacy, Costco, and a CVS-run Target counter are the other three windows on this ledger. Each href opens that chain only. The Jovin hair lock is generic finasteride 1 mg times thirty, dated with the quote month.

Walk in with the generic name and the 1 mg strength written down. 'The prostate one' is how a 5 mg bottle lands in the bag. Membership rules at a warehouse counter are that chain's business. They are not a reason to accept the wrong milligram.

Ask the window for generic finasteride 1 mg, thirty tablets, if that is the prescribed count. A 5 mg prostate bottle is the wrong NDC for this lock. GoodRx's published board sits in the caption under the table, not as a link on a store row. ZIP moves the cash number. A prescription still comes first.

Mail-order lists and warehouse counters change stock. If a named chain does not hold 1 mg, that is a supply fact, not a reason to rewrite the dose. Do not let a clerk 'make 1 mg' by cutting a 5 mg tablet at the counter either. The coat exists for a pregnancy reason.

Bring the same count to every quote so the numbers compare. A ninety-count bottle is a different conversation with the prescriber, not a silent stretch of a thirty-day lock. If the window only stocks 5 mg, walk out. Do not accept a split.

Dr. Hartley does not sell the strip. Neither does this site.

Sexual complaints sat just above placebo

Year-one sexual complaints sat a little above placebo in the three 12-month hair trials. Decreased libido: 1.8 percent on Propecia (n=945) versus 1.3 percent on placebo (n=934). Erectile dysfunction: 1.3 versus 0.7. Ejaculation disorder: 1.2 versus 0.7, with decreased volume in 0.8 versus 0.4.

One or more of those sexual events: 3.8 percent versus 2.1 percent (p=0.04). Drug-related discontinuations were 1.4 percent on Propecia and 1.6 percent on placebo. Sexual-event discontinuations were 1.2 versus 0.9. Those are small gaps. They are not zero. The mailbag treats them as real.

By year five, each of those sexual complaints had fallen to 0.3 percent or less on drug. Resolution happened in men who stopped and in most who stayed on. A separate 1 mg study found a median ejaculate-volume drop of 0.3 mL (11 percent) versus 0.2 mL (8 percent) on placebo at 48 weeks.

Post-marketing language now lists persistent erectile trouble after stopping, mood change, and rare suicidal thoughts. Breast tenderness and male breast cancer reports sit on the 5 mg file as well. Causation for lingering symptoms is not settled in the controlled set. I still stop the tablet if mood or sexual function turns. Hair is not worth pushing through that.

The 1 mg tablet is the hair pack

Propecia is one milligram once a day. That is the hair lock this note files. Proscar is five milligrams once a day for benign prostatic hyperplasia. Same molecule. Different pack. Different reason to take it. Do not treat the 5 mg prostate tablet as a cheaper hair hack. This cabinet does not tell readers to split Proscar.

The dose-response for scalp DHT is already steep at 1 mg. The insert's hair trials used that strength. Pushing to 5 mg adds prostate shrinkage and more systemic exposure. It does not turn a timid hairline into a teenage one. If a man needs both jobs done, that is a clinic conversation, not a kitchen split.

Food does not change how much of the 1 mg tablet gets in. Take it with breakfast or on an empty stomach. Pair it with a habit that already happens every day. Missed odd tablets are less of a problem than quitting for a month and restarting the clock. A week off is how men quietly undo a hold they thought was permanent.

Topical minoxidil is a separate labelled route and a common pair. This page does not dose minoxidil. If a clinician adds it, that is a second mechanism, not a substitute for the 1 mg oral hold. Forum 'hair stacks' that mix unlabelled topicals with a split prostate tablet are outside this cabinet.

If a man already takes 5 mg for the prostate, that pack belongs to the urology file. I do not add a second 1 mg hair tablet on top, and I do not cut the 5 mg tablet into fifths. One clinician should know both jobs before anyone changes a milligram.

Vertex and mid-scalp were the trial fields

Vertex trials enrolled 1553 men with mild to moderate crown loss. A third study enrolled 326 men with anterior mid-scalp thinning, with or without vertex balding. Together that is 1879 men, mostly Caucasian, ages 18 to 41. Complete baldness was not the population.

At 12 months the two vertex studies showed a 107-hair difference from placebo inside a 1-inch circle (5.1 cm2). Propecia n=679. Placebo n=672. Hair count held through two years, with a 138-hair gap (n=433 versus n=47). At five years the gap was 277 hairs (n=219 versus n=15). Placebo kept falling. The tablet stayed above its own baseline even after a slow fade from the two-year peak.

Men who switched from placebo to Propecia after a year of loss did grow hair. They grew less, from the original baseline, than men who started on the tablet in year one (56 hairs versus 91 in that labelled comparison). Earlier start held a higher absolute count.

Photographic raters at five years called 48 percent of men on finasteride improved and another 42 percent unchanged. On placebo, only 25 percent were improved or unchanged. The drug's real prize is holding a crown that would have thinned. Regrowth is a smaller gift, and it is vertex-first. Temples that have already gone shine rarely read like the vertex counts.

All men in those studies used a specified tar shampoo in the first two years so seborrhea would not confuse hair counts. That detail is easy to skip when someone quotes '107 extra hairs' without the circle size. The circle was 5.1 cm2. It was not the whole scalp.

DHT falls about 65 percent in a day

Serum DHT falls about 65 percent within 24 hours of a 1 mg oral dose. That is the pharmacodynamic line in the US insert. Mean testosterone and estradiol rise about 15 percent and stay inside the physiologic range. The drug has no affinity for the androgen receptor itself.

Finasteride does not move cortisol, TSH, or thyroxine in the volunteer work. Lipids and bone mineral density did not shift in those studies. LH, FSH, and prolactin stayed quiet. The hypothalamic-pituitary-testicular axis still answered GnRH.

Type II 5-alpha-reductase sits in hair follicles, prostate, genital skin, and liver. That isoenzyme makes about two-thirds of circulating DHT. Finasteride binds it and takes the enzyme out of service. New enzyme has to be made before DHT climbs back.

Balding scalp holds more DHT and smaller follicles than hairy scalp. The tablet lowers scalp and serum DHT. The insert says the relative weight of those two drops is not defined. What is defined: this route does nothing for alopecia that is not androgen-driven. Alopecia areata, a telogen dump after fever, and scarring loss need another work-up.

Type I enzyme in sebaceous skin is not the main target. That is why a 1 mg tablet can drop circulating DHT hard while leaving most testosterone machinery intact. It is also why acne and oil are poor reasons to start this pack. The hair lock is androgenetic thinning in men, nothing broader.

File it as a hold you can name, or do not start

Stopping the tablet gives the follicles their old DHT bath back. File that before the first dose, not after a year of quiet use. The US insert's reversal window is twelve months. I would rather a man never start than start and drift. A holiday from the tablet is not a harmless pause. It is the start of giving the crown back.

The file on this molecule is simple enough to say in one breath. One milligram daily. Three months before the vertex gets a verdict. Intact tablets only around a pregnancy. PSA adjusted. No kitchen split of a 5 mg prostate pack. If any of those lines is unacceptable, leave the bottle unopened.

If sexual function or mood turns after a start, stop and write to the prescriber. Do not taper a 1 mg tablet in secret and call that a plan. If a PSA is due, put the drug name on the form before the blood is drawn. A quietly low number that nobody adjusted is how a real problem hides.

The mail that follows a start is filed in the hair-loss questions note. Rosalind's replies sit under this page. A named GP still has to see you before any tablet is yours. This cabinet writes the lock. It does not hand over a strip. Photograph the crown, then wait.