What is Tetrahydrobiopterin (BH4)?

Category: Supplements


Tetrahydrobiopterin is a supplement that is a precursor to the neurotransmitters serotonin, melatonin, dopamine, norepinephrine, epinephrine, and nitric oxide.

Side effects

Side effects as an overall problem

Side effects as an overall problem
Severity Evaluations
Severe 0
Moderate 0
Mild 1
None 0

Commonly reported side effects and conditions associated with Tetrahydrobiopterin (BH4)

Side effect Patients
Fatigue 1

Why patients stopped taking Tetrahydrobiopterin (BH4)

Multiple reasons could be selected

Reason Patients
Expense 1
See 1 patient who's stopped taking Tetrahydrobiopterin (BH4)


Stopped taking Tetrahydrobiopterin (BH4)

Duration Patients
1 - 6 months 1
Adherence Evaluations
Always 0
Usually 0
Sometimes 1
Never taken as prescribed 0
Burden Evaluations
Very hard to take 0
Somewhat hard to take 0
A little hard to take 1
Not at all hard to take 0
Last updated:
There are no evaluations for Tetrahydrobiopterin (BH4).