4 Medication Precautions, Storage, and Interactions

Follow directions and check precautions

Use medicines as directed. Unless the label or a health professional gives different instructions, do not change a dose, stop a medicine, or combine it with another product on your own. Ask a pharmacist or prescriber when directions are unclear.

Check interactions, food, and alcohol

A drug interaction can involve prescription or nonprescription medicines, vitamins, herbal products, foods, or drinks. Before starting a new medicine or supplement, share a complete list of these products with a pharmacist or prescriber and ask them to check for interactions. Taking products at different times does not necessarily prevent an interaction.

Follow a medicine’s specific warnings about alcohol, foods, and beverages. These can affect how some medicines work or increase unwanted effects. If a warning or direction is unclear, ask a pharmacist or prescriber about that particular medicine. Do not skip or change a dose to make room for alcohol.

Handle missed doses and side effects

Missed dose instructions differ among medicines. If you forget a dose and are unsure what to do, check the label or patient information, or contact a pharmacist or prescriber. Do not take a double or extra dose, or stop treatment, without guidance.

Learn which effects may be expected, which require prompt attention, and whom to contact. Record new or bothersome symptoms and contact a pharmacist or prescriber for advice. Do not add another treatment or change prescribed medicines without checking. Seek urgent medical help for a severe or rapidly worsening reaction.

Store medicines safely

Follow the medicine storage instructions on its label or patient information because storage needs can differ. Keep medicines in their labeled containers when possible and safely out of children’s reach. Protect them from unsuitable heat, moisture, or light as directed; do not assume that all medicines belong in a refrigerator. Ask a pharmacist what to do if a medicine was stored improperly.

Dispose of unused medicines

Use a take-back program when available; it is the preferred option for most unused or expired medicines. If one is not readily available, check whether the medicine is on the FDA flush list and follow the applicable instructions. Medicines not on that list may generally be discarded in household trash by following FDA guidance. Never share medicines with another person.

Confirm understanding with teach-back

Teach-back checks whether a patient can explain the medicine instructions in their own words. Ask the patient to describe how they will take and store the medicine, which warnings they will follow, and whom they will contact if a problem occurs. Include dose and timing, precautions, interactions, and what to do about side effects or a missed dose.

If the explanation reveals a misunderstanding, clarify the directions and ask the patient to explain them again.