Finasteride is a prescription tablet that reduces the hormone DHT, a key driver of male pattern hair loss. It can slow recession and thicken hair at the crown and mid‑scalp.
How does finasteride work?
Finasteride blocks the enzyme 5‑alpha reductase type II, which converts testosterone to dihydrotestosterone (DHT). Lower DHT reduces shrinkage of hair follicles in androgenetic alopecia.
How effective is finasteride?
- Many users see slower hair loss after three months
- Visible thickening typically appears by six to twelve months
- Benefits last only while you keep taking it
How to take finasteride
- Take one 1 mg tablet once daily, any time of day, with or without food
- If you miss a dose, take it when remembered unless it is close to the next dose
- Do not take extra tablets to make up for missed doses
Common side effects
- Decreased libido or change in ejaculation volume
- Breast tenderness or swelling (see a doctor promptly)
- Mood changes or low mood (stop and seek medical advice if this occurs)
Speak to a doctor urgently if you notice breast lumps, nipple discharge, severe mood change or signs of allergy. Tell the doctor about all medicines you take. Finasteride is not suitable in pregnancy and should be kept away from children.
Finasteride and fertility
Most people have no change in fertility, but a small number may notice temporary changes in semen volume. If you are actively trying to conceive, discuss risks and alternatives with a doctor.
How to get finasteride online in Ireland
Step 1: choose an online doctor, such as online doctor partner, Zava, and complete a short medical questionnaire.
Step 2: if treatment is appropriate, the doctor issues a prescription and sends it to your chosen pharmacy by Healthmail. If you choose Healthwave, your doctor can address it to healthwave.dundrum@healthmail.ie.
Step 3: the pharmacy confirms availability and explains follow‑up. If you choose Healthwave, we pack discreetly and deliver typically within one to two working days, or arrange convenient collection.
Prefer a video consultation with a doctor? Book securely with Eirdoc.
Prefer to see a doctor in person?
How much does finasteride cost in Ireland?
Costs vary by brand and pack size. See current pricing here.
Can you combine finasteride with oral minoxidil?
Yes. Finasteride lowers DHT while oral minoxidil helps stimulate follicles, so the combination is commonly considered in practice. Your doctor will assess suitability, start low to minimise side effects, and advise on follow-up (for example, blood pressure checks and monitoring for swelling or changes in libido). Reassess at 3 to 6 months to confirm that the added benefit outweighs any downsides.
Oral minoxidil for hair loss
If finasteride is not right for you, low‑dose oral minoxidil can be considered. Learn how it works, dosing and safety here: Everything You Need to Know About Oral Minoxidil Ireland.
FAQs
How long does finasteride take to work?
Most people notice slowing of loss within three months, with visible thickening by six to twelve months.
Does finasteride stop working after a while?
It continues to work while you take it. Stopping leads to catching up with natural hair loss over several months.
Can finasteride affect mood?
Low mood is uncommon but reported. Stop the medicine and speak to a doctor urgently if mood changes occur.
Does finasteride affect PSA blood tests?
It can reduce PSA levels. Tell your doctor you take finasteride so any PSA test can be interpreted correctly.
Is finasteride safe with alcohol?
There is no specific interaction, but moderation is sensible.
