Can I take St john's wort and Vitamin d together?
Drug interaction guide
Originally published 25 Jan 2026
Satisface las necesidades del paciente directrices editoriales
- DescargarDescargar
- Compartir
- Idioma
- Debate
St John's Wort may lower the levels of Vitamin D in your body, potentially leading to a deficiency. This means your Vitamin D supplement might not work as well as it should to support your bone health and immune system.
En este artículo:
Seguir leyendo
Why this happens
St John's Wort is a 'liver enzyme inducer'. It speeds up the proteins (specifically CYP3A4) in your liver that break down medications and vitamins. This causes Vitamin D to be cleared from your system much faster than normal.
What you should do
If you are taking both, you should speak to your GP. They may want to monitor your Vitamin D levels with a blood test or suggest increasing your Vitamin D dose. Do not stop taking prescribed medication without consulting your doctor first.
Seguir leyendo
Using other medicines
Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Descargo de responsabilidad
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
Patient picks for Drug interactions
Tratamiento y medicación
Can I take Citalopram and Co codamol together?
Taking these two medicines together can increase the risk of a rare but serious condition called serotonin syndrome. It can also make you feel more drowsy or dizzy than usual. Additionally, citalopram may slightly reduce how well the codeine part of the co-codamol works to relieve your pain.
Tratamiento y medicación
Can I take Idapamide and Ramipril together?
Taking indapamide and ramipril together can cause your blood pressure to drop too low, especially when you first start the combination. This can make you feel dizzy, lightheaded, or faint. It can also put extra strain on your kidneys.
Seguir leyendo
Historia del artículo
La información de esta página ha sido redactada y revisada por médicos cualificados.
25 Enero 2026 | Publicado originalmente
Pregunte, comparta, conecte.
Explore debates, formule preguntas y comparta experiencias sobre cientos de temas de salud.
¿Se encuentra mal?
Evalúe sus síntomas en línea de forma gratuita
Suscríbase al boletín informativo para pacientes.
Tu dosis semanal de consejos de salud claros y fiables, redactados para ayudarte a sentirte informado, seguro y en control.
Al suscribirte, aceptas nuestra Política de privacidad. Puedes darte de baja en cualquier momento. Nunca vendemos tus datos.