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Get answers to your most common health questions here.


Find Frequently Asked Questions in alphabetical order by category.

Thyroid Conditions

Levothyroxine and Supplements: Can levothyroxine be taken with food, vitamins, iron, or other minerals?

Levothyroxine: How do you take levothyroxine?

Urinary Tract Health

Urinary Tract Infections: Are there any over-the-counter treatments for a UTI?

Cranberry Juice: Does drinking cranberry juice prevent urinary tract infections?


Pharmacist Immunizers: Are pharmacists permitted to give vaccinations besides the flu shot?

Flu Vaccine: How long does it take for the flu vaccine to work?

Gardasil: What is Gardasil and who should get the HPV vaccine?

Shingles: What is shingles and how can it be prevented?

Viral Infections

Genital Wart Treatment: Are there any treatments for genital warts?

Genital Warts: What are genital warts?

Interferons: What are interferons and are there any side effects?

Ribavirin: What are the side effects of ribavirin?

Gardasil: What is Gardasil and who should get the HPV vaccine?

Vitamins and Supplements

Calcium Risks and Interactions: Are there any risks in using calcium supplements?

Lycopene Risks & Interactions: Are there any risks in using lycopene?

Evening Primrose: Are there side effects or drug interactions for evening primrose?

Zinc: Does taking zinc really cure the common cold?

Vitamin K: Does Vitamin K interact with warfarin?

Blood Thinners: Do some herbal medications interact with blood thinners?

Prenatal Vitamins: How can I pick a prenatal vitamin for me and my baby? How much folic acid should I take?

Calcium Supplementation: How can I take calcium?

Lycopene Dosing Information: How can I take lycopene?

Calcium Effectiveness: How do calcium supplements work?

Garlic Products: How do I choose a garlic product?

Iron Supplements: How do I choose between iron supplements?

Vitamin A Dose Information: How do I take vitamin A?

Vitamin Overdose: Is it possible to take too many vitamins?

Citrate or Carbonate: What's the difference between calcium citrate and calcium carbonate?

Calcium: What are calcium supplements?

Ginseng: What are common uses and side effects of ginseng?

Fish Oil: What are fish oil supplements?

Phytoestrogens: What are phytoestrogens?

Calcium Supplements: What are the recommended daily amounts of calcium?

Vitamin A Risks: What are the risks of taking vitamin A?

Flaxseed: What are the side effects of flaxseed?

Metabolife: What are the side effects of Metabolife?

SAM-e: What are the side effects of SAM-e?

Valerian: What are the side effects of valerian?

Wild Yam: What are the side effects of wild yam?

Niacin side effects: What are Vitamin B3 or niacin's side effects?

Probiotics: What exactly are probiotics?

Acai: What is acai?

Homeopathic Drugs: What is a homeopathic drug and are homeopathic drugs safe?

Antioxidants: What is an antioxidant?

Androstenedione: What is androstenedione?

Black Cohosh: What is black cohosh?

Chitosan: What is chitosan?

Cholestin: What is Cholestin?

Chromium: What is Chromium?

Coenzyme Q10: What is Coenzyme Q10 and is it safe?

Conjugated linoleic acid: What is conjugated linoleic acid?

Creatine: What is Creatine used for and are there any side effects?

DHEA: What is DHEA used for and are there any side effects?

Dong Quai: What is dong quai?

Echinacea: What is Echinacea and are there any side effects?

Garlic: What is garlic used for and are there any side effects?

Gingko: What is gingko used for and are there any side effects?

Grape Seed Extract: What is grape seed extract used for?

Horse Chestnut: What is horse chestnut?

Kava Kava: What is kava kava?

Lycopene: What is lycopene?

Melatonin: What is melatonin?

Milk Thistle: What is milk thistle?

Red Yeast Rice: What is red yeast rice?

Saw Palmetto: What is saw palmetto?

Soy: What is soy?

St. Johns Wort: What is St. John's wort?

Vitamin A: What is Vitamin A and what does it do?

If you're looking for more specific answers to specific questions, ask a Walgreens pharmacist here.

Answers to questions regarding information about medications or health conditions are not for diagnostic or treatment purposes and are not conclusive as to the presence or absence of any health condition. Consult your physician for diagnosis and treatment of your medical condition. The information provided is not a substitute for medical advice. Advances in medicine may cause this information to become outdated, invalid or subject to debate. Professional opinions and interpretations of the scientific literature may vary. Walgreens' terms of use and general warranty disclaimer apply to all services provided. If you are in need of immediate medical attention, contact your physician, poison control center or emergency medical professional. If you need to speak with a pharmacist for non-emergency matters, contact your local Walgreens pharmacist or call a pharmacist toll-free at 1 (877) 250-5823.