Should I avoid grapefruit juice while taking Levothyroxine?

click on the link to read about the interactions with food:

https://www.drugs.com/food-interactions/levothyroxine.html

Avoid the following:

Certain medicines can make levothyroxine less effective if taken at the same time. If you use any of the following drugs, avoid taking them within 4 hours before or 4 hours after you take levothyroxine:

calcium carbonate (Alka-Mints, Calcium Oyster Shell, Caltrate, Os-Cal, Oyster Shell Calcium, Rolaids Soft Chew, Tums, and others);
cholestyramine, colestipol;
ferrous sulfate iron supplement;
sucralfate;
sodium polystyrene sulfonate (Kalexate, Kayexalate, Kionex); or
antacids that contain aluminum or magnesium - Acid Gone, Gaviscon, Maalox, Milk of Magnesia, Mintox, Mylanta, Pepcid Complete, and others).
Avoid the following food products, which can make your body absorb less levothyroxine: infant soy formula, cotton seed meal, walnuts, and high-fiber foods.

https://www.drugs.com/levothyroxine.html

best of luck.-

You shouldn't take the levothyroxine with anything other then water. Then wait 30 min before you put anything else in your stomach. Its your pharmacist who would be the one who should tell you to avoid it if you need to. Dairy products can slow absorption so you shouldn't have them within a few hours of taking the pill. Grapefruit juice doesn't come up on the list.
Whenever you take it and whatever you eat around, you should continue to do, because your dose will get adjusted to that. So if you take it before breakfast, and are waiting an hour to eat, keep that up. If you want to take it another time of day, keep that up. Don't alter it.