What Can You Take?

What can you take when your body needs help depends entirely on what problem you are trying to solve. There is no single answer, because “what can you take” means something different for a headache, a vitamin deficiency, a cold, or chronic pain. The honest answer is that the right choice comes down to matching a specific substance to a specific, well-understood need — and knowing when nothing you can buy over the counter will actually help.

This article walks through the main categories of things people take — vitamins and minerals, over-the-counter medications, herbal supplements, and prescription drugs — and explains what the evidence actually supports for each. It also covers the questions you should ask before taking anything new.

What Can You Take for a Vitamin or Mineral Deficiency?

If a blood test confirms you are low in a specific nutrient, taking that nutrient in supplement form is a well-established way to correct the deficiency. This is the clearest case where supplements genuinely work — not as a general health boost, but as a targeted fix for a measured shortfall.

Iron deficiency anemia, for example, is diagnosed through blood work and treated with iron supplementation under medical supervision. Vitamin B12 deficiency, which is more common in older adults and in people who follow a strict vegan diet, is treated with B12 supplements or injections. Vitamin D deficiency is corrected with vitamin D supplementation, with the dose determined by how low your levels are.

The key word here is deficiency. If your levels are normal, taking more of a nutrient generally does not improve how you feel or prevent disease. Large trials of multivitamins and single-nutrient supplements in well-nourished adults have mostly failed to show meaningful protection against heart disease, cancer, or early death. That does not mean supplements are useless. It means they help most when they correct a real shortfall.

Some nutrients are also genuinely risky at high doses. Vitamin A, vitamin D, iron, and selenium can cause harm when taken in excess. Iron overload, in particular, is a real concern for people who do not need extra iron. This is why testing before supplementing matters.

What Can You Take for Common Everyday Symptoms?

Over-the-counter medications are among the most studied substances in medicine, and for many common symptoms they work. The catch is that each drug treats a specific symptom, and using the wrong one does nothing.

• Pain and fever: Acetaminophen and nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen are the standard options. They work through different mechanisms and have different risk profiles.
• Allergies: Antihistamines reduce sneezing, itching, and runny nose. Older antihistamines often cause drowsiness; newer ones generally do not.
• Heartburn and acid reflux: Antacids neutralize stomach acid quickly. Acid reducers such as H2 blockers and proton pump inhibitors reduce how much acid the stomach makes.
• Cough and cold: The evidence for most oral cold remedies is weak. Decongestants can help a stuffy nose in adults, but they can raise blood pressure and are not recommended for young children.

NSAIDs are not interchangeable with acetaminophen. NSAIDs can irritate the stomach, affect kidney function, and raise bleeding risk, especially in older adults or people taking blood thinners. Acetaminophen is gentler on the stomach but can cause serious liver injury when taken above the recommended dose or combined with alcohol. Reading the label is not optional here.

One point that surprises many people: combination cold and flu products often contain acetaminophen or an NSAID plus several other ingredients. Taking one of these alongside a separate pain reliever can easily push you past a safe dose without you realizing it.

What Can You Take — Herbal and Dietary Supplements

This is where the gap between marketing and evidence is widest. Supplements are regulated as food, not medicine, in the United States. They do not need to prove they work before they are sold.

A few have reasonable evidence behind them for specific uses. St. John’s wort has been studied for mild to moderate depression, and some research suggests it may be comparable to standard antidepressants for mild cases — but it interacts with many medications, including birth control pills and blood thinners, and can reduce their effectiveness. Melatonin has some evidence for helping with jet lag and certain sleep timing problems, though evidence for general insomnia is mixed.

Many popular supplements have far weaker support. The evidence for most weight-loss supplements, “immune boosters,” and detox products is limited or absent. No large human trials have confirmed that these products do what their labels suggest.

There is also a safety issue that gets less attention than it should. Because supplements are not tightly regulated before sale, some have been found to contain ingredients not listed on the label, including prescription drugs or heavy metals. If you take any supplement, look for third-party testing seals, which indicate a product has been checked for purity.

What Can You Take When You Are Pregnant or Breastfeeding?

Pregnancy and breastfeeding are the situations where “what can you take” matters most, because almost everything crosses to the baby to some degree. The safest approach is to take as little as possible and to check with a clinician before starting anything, including herbs and supplements you assume are harmless.

Prenatal vitamins are a standard recommendation because they supply nutrients — notably folic acid — that support fetal development. Folic acid is well established for reducing the risk of certain birth defects when taken before and during early pregnancy. This is one of the strongest cases for a supplement in all of medicine.

For pain, fever, or cold symptoms during pregnancy, the choice of medication is a genuine clinical decision, not a do-it-yourself one. Some common over-the-counter drugs are generally avoided at certain stages of pregnancy. Others are considered acceptable in specific situations. This varies by drug, by trimester, and by your individual health history.

For herbal supplements, the picture is often unclear. Many have not been studied in pregnant women, and some are known to be unsafe. No clinical guidelines currently exist for the safe use of most herbal products during pregnancy, which is itself a strong reason for caution.

What Can You Take — Prescription Medications and When They Are Needed

Prescription medications exist for conditions that over-the-counter options cannot manage. High blood pressure, diabetes, thyroid disorders, infections, and many mental health conditions all fall into this category. For these, the question is not whether to take something but which specific drug and dose a clinician recommends.

Prescription drugs go through rigorous testing for safety and effectiveness before approval, which is a meaningful difference from supplements. That does not make them risk-free. Every medication has side effects, and some interact dangerously with others.

This is why a complete medication list matters. When a clinician knows everything you take — prescriptions, over-the-counter drugs, and supplements — they can catch interactions that might otherwise cause harm. Many people do not think to mention supplements during a medical visit. That omission can matter.

How Do You Decide What to Take?

Start with the problem, not the product. Ask what symptom or condition you are actually trying to address, and whether there is good evidence that anything helps it.

Then ask a few practical questions:

• Has this been studied in people, or only in cells or animals?
• Is there a known dose that has been tested, or is the label vague?
• Could it interact with anything else I take?
• Do I have a condition — pregnancy, kidney disease, liver disease, a bleeding disorder — that changes the risk?
• Is a clinician’s input needed before I start?

If a product promises to fix many unrelated problems at once, that is a warning sign, not a selling point. Real treatments tend to be specific. A drug that treats one condition well is more believable than a pill that claims to improve energy, sleep, weight, and mood all at the same time.

The most useful habit is to treat “what can you take” as a question with a specific answer for your specific situation — not a general one. When the answer is unclear, or when the stakes are high, that is exactly when a clinician’s input is worth getting.