All medications have side-effects, and if they write those possible side-effects on the instructions list that comes with them, it doesn’t mean that those could happen. Usually they put all the possible side-effects in there, and even more, just to be on the safe-side and not get sued if someone experiences something not on that list.

Vicodin comes with instructions that it might have some of these side-effects after being used: nausea, vomiting, constipation, lightheadedness, dizziness, drowsiness, flushing, vision changes, or mental/mood changes, slow/irregular breathing, slow/irregular heartbeat, change in the amount of urine, impairment or loss of hearing, allergic reactions (rash, itching, swelling, severe dizziness). If you experience such side-effects after taking Vicodin and they are getting worse, it’s advisable to notify your doctor or pharmacist.

The doctor prescribed Vicodin because the benefit (usually for pain relief) to you is greater than the probability of experiencing side effects, and these side-effects don’t affect most of the people using Vicodin.

It’s also important not to exaggerate with the amount of Vicodin pills you take at once, always stick to the quantity the doctor prescribed. An adult can have a maximum dose of 4 grams of acetaminophen per day, so if you take more than the maximum daily amount you might experience serious liver disease, followed by these symptoms: severe nausea, yellowing eyes or skin, dark urine, stomach pain, extreme fatigue.

This is a partial list of possible side effects, so anything you notice unusual after taking Vicodin you should discuss with your doctor or pharmacist.