SIDE EFFECTS. The following adverse reactions have been identified during post approval use of hydrocodone and acetaminophen tablets. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Advil gel caps have been my pain reliever of choice for many years – Tylenol just does NOT work for me. I usually take 400mg (2 capsules). Tinnitus, in my case, is related to hearing loss, I believe due to Meniere’s tho I have not been officially diagnosed – in testing now. Acetaminophen is a drug used to relieve pain and reduce fever. Most people don't experience side effects with this drug when it is used appropriately. Common side effects are nausea, rash, and headache. Adverse and serious side effects are kidney damage, anemia, anyphylaxis, and liver failure. SIDE EFFECTS. Serious adverse reactions that may be associated with PERCOCET tablet use include respiratory depression, apnea, respiratory arrest, circulatory depression, hypotension, and shock (see OVERDOSAGE). Chemotherapy Side Effects include vomiting, nausea, hair loss, nerve damage, fatigue, diarrhea, constipation and more. Learn about the potential side effects of Elavil (amitriptyline). Includes common and rare side effects information for consumers and healthcare professionals. Weakness (Asthenia) What is asthenia? Asthenia is the loss or lack of bodily strength also referred to as generalized weakness. Persons undergoing chemotherapy treatments can have weakness for a variety of reasons both physical and mental. Note: This document contains side effect information about acetaminophen / hydrocodone. Some of the dosage forms listed on this page may not apply to the brand name Norco. Central Neurotoxicity and Memory Loss chemotherapy side effect, causes, symptom management and when to contact your healthcare provider during cancer treatment. Consumer information about the medication ACETAMINOPHEN/CODEINE - ORAL (Tylenol-Codeine No.3, Tylenol-Codeine No.4, Vopac), includes side effects, drug interactions, recommended dosages, and storage information. Read more about the prescription drug ACETAMINOPHEN/CODEINE - ORAL.