Explore questions from across science through evidence, mechanisms, limitations, and the explanations behind familiar claims.
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Yes, your dog can usually sleep with you after flea treatment, but not immediately. Wait until the product has dried completely on the skin and coat, which typically takes 4 to 24 hours depending on formulation.
Read the story ↗Yes, music can cause seizures in a small number of people, a condition neurologists call musicogenic epilepsy.
Yes, mouth breathing can cause morning headaches, and the mechanism is well understood: nasal breathing produces nitric oxide that improves oxygen uptake and helps regulate carbon dioxide in the blood, while mouth breathing bypasses this…
Yes, muscle relaxers can be addictive, but the risk is not uniform: it ranges from near-zero for non-sedating agents to substantial for carisoprodol, a drug the U.S.
Yes, mono can live on surfaces, but the virus behind it is far less durable than most people fear.
Mold exposure is not an established cause of Parkinson's disease, but a specific fungal toxin, 1-octen-3-ol, has been shown to selectively kill dopamine-producing neurons in laboratory and animal studies, and chronic mold-related…
Yes, mouthwash can raise blood pressure in some people, most plausibly by killing the oral bacteria that convert dietary nitrate into nitric oxide, a molecule that relaxes blood vessels.
Yes, mold can be blue, and the color almost always comes from one of two things: a pigment the fungus makes itself, or light scattering through its spores and hyphae.
Yes, migraines can affect your ears. Roughly 1 in 3 people with migraine experience ear-related symptoms during or between attacks, most often dizziness, tinnitus, or a sense of fullness in the ear.
Yes, mold exposure can cause nerve pain, but almost never by infecting nerves directly.
Yes, methotrexate can cause lung problems, and they fall into three distinct categories that carry very different risks.
Yes, mold exposure can cause joint pain and arthritis-like symptoms, but the pathway is indirect. Mold does not infect joints the way bacteria do.
Yes, metformin can cause bloating and gas. These are among the most common gastrointestinal side effects of the drug, reported in roughly 20% to 30% of people who start it, with bloating and flatulence clustering in the first two to four…
Yes, a metronidazole overdose can cause death, but it is uncommon: fatal cases almost always involve massive ingestions (roughly 10 g or more in adults), co-ingestion of alcohol or other central nervous system depressants, or severe…
Metformin does not directly cause yeast infections, but it can raise the risk indirectly. The drug does not feed Candida or damage vaginal tissue. Instead, high blood sugar, which metformin is prescribed to lower, fuels Candida growth.
Metformin can cause acid reflux or GERD-like symptoms in some people, but it is not a classic acid-suppressing-vs-acid-producing drug story: the mechanism is largely gastrointestinal intolerance rather than a direct effect on the…
Yes, mental health records can be subpoenaed in the United States, but they receive stronger legal protection than almost any other medical record.
Yes, menopause can raise blood pressure, but it does so indirectly and gradually rather than as a single event.
Yes, methocarbamol and Tylenol (acetaminophen) can be taken together for most adults, and the combination is common after muscle strains, back spasms, and dental or orthopedic procedures.
Yes, menopause can cause blurry vision, and the mechanism is not mysterious: estrogen receptors sit throughout the cornea, lacrimal gland, and lens, so when circulating estradiol falls from a reproductive range of roughly 50-300 pg/mL to…
Metformin is not a recognized cause of breast pain, and no major drug-safety body lists mastalgia among its established side effects.
Yes, meloxicam can make you constipated. It is an uncommon but well-documented side effect, reported in roughly 1 to 5 percent of people taking the drug in clinical trials.
Metformin can cause joint pain, but it is an uncommon and largely indirect effect rather than a classic side effect.
Yes, men can get the HPV vaccine, and in the United States the Food and Drug Administration has licensed it for males since 2009.
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