Advil’s active ingredient is ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID), at a standard dose of 200 mg per tablet, caplet, or gel capsule. That’s the ingredient doing the actual work of reducing pain, fever, and inflammation. But a single Advil tablet contains more than a dozen other ingredients that hold it together, coat it, and help your body absorb it.
The Active Ingredient: Ibuprofen
Every standard Advil product contains 200 mg of ibuprofen per dose, regardless of whether you buy tablets, caplets, or gel capsules. Ibuprofen works by blocking enzymes called COX-1 and COX-2, which your body uses to produce prostaglandins. Prostaglandins are chemical messengers that trigger inflammation, pain, and fever. By reducing prostaglandin production, ibuprofen tackles all three at once.
Ibuprofen binds to these enzymes rapidly and reversibly, meaning it competes directly with the natural chemicals your body would normally process. This is why the relief is temporary: once the ibuprofen clears your system, the enzymes resume normal activity. You can expect pain relief to kick in within 30 to 60 minutes after taking a dose, and it typically lasts 6 to 8 hours.
Inactive Ingredients in Standard Advil Tablets
The other ingredients in a coated Advil tablet don’t treat pain, but each serves a purpose in manufacturing, stability, or absorption. The full list for standard Advil tablets includes: acetylated monoglycerides, colloidal silicon dioxide, corn starch, croscarmellose sodium, methylparaben, microcrystalline cellulose, pharmaceutical glaze, pharmaceutical ink, povidone, pregelatinized starch, propylparaben, sodium benzoate, sodium lauryl sulfate, stearic acid, sucrose, synthetic iron oxide, titanium dioxide, and white wax.
In practical terms, here’s what those do. Corn starch and microcrystalline cellulose act as fillers and binders that give the tablet its shape. Croscarmellose sodium helps the tablet break apart in your stomach so the ibuprofen can dissolve. Stearic acid keeps the powder from sticking to manufacturing equipment. The pharmaceutical glaze and white wax form the smooth outer coating, while titanium dioxide and synthetic iron oxide provide the tablet’s color. Methylparaben, propylparaben, and sodium benzoate are preservatives. Sucrose adds a thin sugar layer to the coating.
If you have sensitivities to dyes, preservatives, or sugar, it’s worth noting that dye-free ibuprofen versions exist with a simpler ingredient list. These film-coated alternatives skip the iron oxide coloring and sugar coating, using ingredients like hypromellose and polydextrose instead. Some dye-free formulations also contain lactose, which matters if you have a dairy sensitivity.
What’s Different in Advil Liqui-Gels
Advil Liqui-Gels still contain 200 mg of ibuprofen, but the drug is dissolved (solubilized) rather than compressed into a solid. The ibuprofen is present partly as a potassium salt, which is why each capsule contains about 20 mg of potassium. The liquid fill uses medium-chain triglycerides and soy lecithin as carriers, enclosed in a gelatin shell. Other inactive ingredients include FD&C green no. 3 (the dye that gives them their green color), polyethylene glycol, sorbitol, and purified water.
Because the ibuprofen is already dissolved, Liqui-Gels don’t need to break down in your stomach the way a compressed tablet does. If you have a soy allergy or avoid gelatin, these aren’t the right choice.
What’s in Advil PM and Advil Dual Action
Not all Advil products contain only ibuprofen. Two common variations add a second active ingredient:
- Advil PM contains 200 mg of ibuprofen plus 38 mg of diphenhydramine citrate, an antihistamine that causes drowsiness. It’s the same type of ingredient found in Benadryl, repurposed here as a sleep aid. This product is designed for nighttime use when pain is keeping you awake.
- Advil Dual Action combines 125 mg of ibuprofen with 250 mg of acetaminophen (the active ingredient in Tylenol). Because these two drugs reduce pain through different pathways, the combination can be more effective than either one alone at lower individual doses.
Notice that Dual Action contains less ibuprofen per caplet than standard Advil. The total pain relief comes from the two ingredients working together rather than a full dose of either one.
How Much You Can Safely Take
The over-the-counter maximum for ibuprofen is 1,200 mg per day, which works out to six standard Advil tablets (three doses of two tablets) in 24 hours. Prescription-strength ibuprofen goes up to 3,200 mg per day, but that’s a completely different situation managed by a doctor. For OTC use, the 1,200 mg ceiling is the number to remember. Taking more than that increases the risk of stomach bleeding, kidney problems, and cardiovascular issues, especially with regular use over time.