Forma Medical WellnessMinoxidil + Finasteride safety
Minoxidil and finasteride are often used together to slow hair loss and support regrowth. They work in different ways and carry different considerations — here's what to know before you start.
Minoxidil
minoxidil (topical or oral)Topical solution/foam or low-dose oral tablet
Minoxidil widens the small blood vessels around hair follicles and extends the active growth (anagen) phase, helping follicles produce thicker, longer hairs over time.
What it treats
- Androgenetic alopecia (male- and female-pattern hair loss)
- Best results with consistent, once- or twice-daily use over several months
Who shouldn't take it
- Known allergy to minoxidil or propylene glycol
- Oral minoxidil is used off-label for hair loss and is not appropriate for everyone — clinician supervision is required, especially with heart conditions
Warnings & precautions
- Temporary increased shedding during the first weeks is normal as follicles reset
- Scalp irritation, dryness, or itching (topical)
- Unwanted facial or body hair growth (hypertrichosis)
- Oral minoxidil may cause fluid retention, faster heart rate, or lightheadedness
Common side effects
- Scalp itching, flaking, or dryness
- Initial temporary shedding
- Unwanted hair growth on the face/body
- Dizziness or ankle swelling (oral)
Call your clinician if you notice
- Chest pain, rapid heartbeat, or swelling of hands/feet (oral) — seek care promptly
- Sudden, unexplained weight gain
Finasteride
finasterideDaily oral tablet (or topical formulation)
Finasteride blocks the enzyme that converts testosterone into DHT, the hormone most responsible for shrinking hair follicles in pattern hair loss. Lower DHT helps follicles stay healthy.
What it treats
- Male-pattern hair loss (androgenetic alopecia) in men
Who shouldn't take it
- Women who are or may become pregnant must not take or handle broken/crushed tablets — finasteride can harm a developing male fetus
- Children
- Known hypersensitivity to finasteride
Warnings & precautions
- Sexual side effects such as decreased libido, erectile dysfunction, or ejaculation changes — these may persist in a small number of men after stopping
- Mood changes, including depression; stop and talk to a clinician if these occur
- Lowers PSA levels, which can affect prostate cancer screening — tell your provider you take it
- Do not donate blood while taking finasteride or for one month after stopping
Common side effects
- Decreased sex drive
- Erectile dysfunction
- Decreased volume of ejaculate
- Breast tenderness or enlargement
Call your clinician if you notice
- Depression or thoughts of self-harm
- Breast lumps, pain, or nipple discharge
- Allergic reaction (rash, itching, swelling of lips/face)
Ready to see if this fits you?
Start Your IntakeThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. A licensed Forma clinician will review your health history and current medications to determine whether treatment is safe and appropriate for you. Never start, stop, or change a prescription without talking to a healthcare provider. If you think you may have a medical emergency, call 911.