Drug–Supplement Interactions

If you’re taking a blood thinner like warfarin or heparin and also use vitamin E supplements, there’s an important interaction you should know about. Research has shown that high levels of vitamin E may increase your risk of bleeding, particularly when combined with anticoagulant medications. This article breaks down how vitamin E affects blood clotting, […]

Combining 5-HTP with antidepressants can dangerously elevate serotonin levels, potentially triggering serotonin syndrome — a serious, sometimes life-threatening condition. If you’re using selective serotonin reuptake inhibitors (SSRIs) or other serotonergic medications, it’s critical to understand how supplementing with 5-hydroxytryptophan (5-HTP) may interact. This guide explores the science, clinical evidence, and medical advice surrounding the 5-HTP

Biotin, a popular supplement for hair and nail health, can quietly distort your lab test results — sometimes with life-altering consequences. From thyroid misdiagnoses to missed heart attacks, the risks of biotin lab test interference are real, especially for those taking medications. This guide breaks down how biotin affects common tests, the science behind the

When taken together, zinc and quinolone antibiotics can interact in ways that reduce antibiotic absorption and effectiveness. This zinc quinolone interaction is not just theoretical—it can lead to treatment failure, prolonged infection, or even antibiotic resistance. This guide explores the mechanisms behind the interaction, key antibiotics affected, and how to safely schedule your doses. Summary:

Statins are widely used to lower cholesterol, but for many people, they come with an unwanted side effect: muscle pain. Known as statin-associated muscle symptoms (SAMS), this issue affects up to 29% of users and is a leading cause of discontinuation. Vitamin D has been proposed as a potential fix—but does it work? This guide

When you’re taking antibiotics and calcium supplements, the timing could make or break your treatment. The calcium antibiotic interaction is a well-documented issue that can reduce antibiotic absorption, weaken treatment effects, and even promote resistance. This guide explores which antibiotics are affected, how the interference works, and how to time your calcium intake safely around

If you’re managing hypothyroidism and taking both levothyroxine and iron supplements, timing is everything. Taking them too close together can reduce your thyroid med absorption, leading to fluctuating hormone levels and stubborn symptoms. This expert-backed guide explains the iron and levothyroxine interaction, why spacing matters, and how to safely schedule both for optimal thyroid health.

Quick Summary: How Vitamin K Affects Warfarin and INR For related insights, explore our guide on Vitamin E and blood thinners hemorrhage risk. Why the Warfarin–Vitamin K Interaction Matters Warfarin is a vitamin K antagonist. It works by inhibiting vitamin K-dependent clotting factors, reducing blood’s ability to clot. That’s why vitamin K intake must be

Can Vitamin C Affect Adderall? [Quick Summary] Taking vitamin C at the wrong time can subtly but consistently lower Adderall’s effectiveness — especially if symptoms are already difficult to manage. Understanding the Vitamin C and Adderall Interaction How Adderall Is Absorbed in the Body Adderall, an amphetamine-based stimulant, is primarily absorbed in the small intestine.