When should you take hair loss medication?
Finasteride and dutasteride can be taken regardless of meals, and there is almost no difference in effect between morning and evening.
You may simply choose the dosing time that suits you based on your drinking habits or whether you experience side effects.
During hair loss treatment consultations, one of the questions patients ask most frequently is the following.
“When should I take hair loss medication?”
We receive various questions such as which is better between morning and evening,
whether it should be taken before or after meals,
and whether it can be taken even on days when drinking alcohol.
Finasteride and dutasteride are the most widely used medications in the treatment of male pattern hair loss, but there is quite a bit of misinformation regarding dosing times.
In reality, they can be taken regardless of meals, and what matters more than the time of day is the habit of taking them consistently at the same time every day.
In this article, we will look in detail at the correct way to take finasteride and dutasteride based on FDA approval materials and pharmacokinetic characteristics.
Finasteride and dutasteride can be taken regardless of meals.
Many medications have absorption rates that vary depending on food.
For example
- medications that are absorbed better when taken on an empty stomach
- medications that must be taken after meals
- medications that are difficult to take on an empty stomach due to gastric irritation
exist.
However, the hair loss treatment medications
- finasteride
- dutasteride
are somewhat different.
The FDA approval documents and product information (Propecia®, Proscar®, Avodart®) all state that food does not affect the absorption of the medication.
FDA product information
“The bioavailability of finasteride was not affected by food.”
“The pharmacokinetics of dutasteride are not affected by food.”
In other words,
✔ it can be taken on an empty stomach
✔ and it can be taken after meals.
There is no need to force yourself to take it at mealtimes.
Summary of finasteride pharmacokinetics
The same applies to dutasteride.
Dutasteride likewise
shows almost no difference in absorption rate depending on whether it is taken before or after meals.
However,
when a high-fat meal is eaten, the time to reach peak blood concentration (Tmax) may be slightly delayed,
but the ultimate amount absorbed into the body (AUC) is almost the same.
In other words,
there is no meaningful difference in effect.
Summary of dutasteride pharmacokinetics
So is morning better? Or evening?
To state the conclusion first,
there is no difference in effect.
The most important thing is
the habit of taking it at the same time every day.
This is because it is important to maintain a consistent concentration by taking it once a day consistently.
If you drink alcohol frequently, taking it in the morning is also a good option.
Both finasteride and dutasteride
are metabolized in the liver via the CYP3A4 enzyme.
Since alcohol is also metabolized in the liver,
“Is it okay to take them together?”
is a question we receive frequently.
Of course, the best option is to reduce alcohol consumption, but
if you are someone who drinks frequently,
considering taking it in the morning is also a good option.
Since most drinking occurs in the evening,
this is to prevent the time the medication reaches peak blood concentration from overlapping with the drinking time.
What if you feel drowsy or foggy after taking the medication?
Rarely,
some patients
- fatigue
- drowsiness
- brain fog
- decreased concentration
also report symptoms such as these.
If you have such symptoms,
taking it before bedtime may actually be more comfortable.
Conversely, if morning is more comfortable,
it is fine to change it to the morning.
Simply changing the dosing time may reduce discomfort in some patients, but there is no clear evidence for this.
Do sexual side effects also decrease if the dosing time is changed?
Unfortunately, to date there is no clear evidence that changing the dosing time
reduces sexual side effects.
However, since responses to the medication may differ from person to person,
if you experience discomfort, it is advisable to consult with medical staff and find the dosing time that suits you.
What is the difference between finasteride and dutasteride?
Both medications dissolve well in fat, but
dutasteride has much higher lipophilicity than finasteride.
| Item | Finasteride | Dutasteride |
|---|---|---|
| LogP | about 3.2 | about 5.1 |
| Volume of distribution (Vd) | about 76L | about 300–500L |
| Half-life | about 6–8 hours | about 4–5 weeks |
| Tissue penetration | moderate | very high |
High lipophilicity means it can remain longer in
- fat tissue
- sebaceous glands
- hair follicles
and so on.
Because of these characteristics,
dutasteride
acts for a long time not only in the blood but also in tissues,
and has the characteristic that its DHT-suppressing effect within the hair follicle is also sustained.
More important than the dosing time is ‘consistency’.
Many people
wonder “At what time should I take it for the best effect?”
but
in reality,
taking it consistently is far more important than adhering to a specific dosing time.
The habit of taking it at a consistent time every day
is the most important factor in producing long-term hair loss treatment results.
If you fall into these categories, try taking it this way.
Morning dosing recommended
- if you drink alcohol frequently
- if you take other hepatically metabolized medications together
- if your morning routine is consistent
Evening dosing recommended
- if you feel drowsy or fatigued after taking the medication
- if taking it before sleep is more comfortable
Treatment points at Modi Hair Plant Clinic
At Modi Hair Plant Clinic, rather than simply prescribing hair loss medication, we establish a medication treatment plan taking into consideration the degree of hair loss progression, age, family history, lifestyle, existing conditions, and future hair transplant plans.
In particular, when a hair transplant is planned, we also consult on whether to combine it with medication treatment and on the need for maintenance treatment, proposing a more long-term treatment strategy.
Frequently Asked Questions (FAQ)
Q. Should finasteride be taken on an empty stomach?
No. It can be taken regardless of meals.
Q. Is it more effective to take dutasteride in the evening?
No. There is almost no difference in effect between morning and evening.
Q. Is it okay to change the dosing time often?
It is better to take it at the same time every day if possible.
Q. How is it best to take it on days when I drink alcohol?
It is better to space the drinking and medication times sufficiently apart, and if you drink frequently, you may consider morning dosing.
Q. Do I need to continue taking hair loss medication even after a hair transplant?
Transplanted hair is relatively less affected by DHT, but existing hair can continue to undergo hair loss.
Therefore, in most cases it is helpful to maintain medication treatment after consulting with medical staff.
Q. Do I have to take hair loss medication for life?
Male pattern hair loss is a progressive condition, so if medication treatment is stopped, hair loss may progress again.
The treatment period can vary depending on the degree of hair loss progression and treatment goals, so it is advisable to decide after consulting with medical staff.
🎥 Check the details in the video as well.
If you prefer video over text, you can easily check the dosing times and differences between finasteride and dutasteride through the video below.
References
- U.S. FDA. PROPECIA (finasteride) tablet prescribing information — pharmacokinetics (absorption). DailyMed label (“Bioavailability of finasteride was not affected by food.”)
- U.S. FDA. AVODART (dutasteride) capsule prescribing information — pharmacokinetics (effect of food). DailyMed label (states that when taken with food, peak blood concentration decreases by 10–15% but this is not clinically significant, so it can be taken regardless of meals)
The above materials are the U.S. FDA-approved prescribing information (labels) for each medication, which are the sources of the food/absorption-related statements cited in the text.
This content was written based on the latest medical materials and FDA approval information,
and was posted after review by the medical staff of Modi Hair Plant Clinic.