Gentamicin is an aminoglycoside antibiotic. Most antibiotics in the aminoglycoside class can have significant ototoxic effects. Of these, streptomycin and gentamicin are primarily toxic to the vestubular system, while amikacin, neomycin, dihydrosterptomycin, and kanamicin primarily affect the cochlea. None of the other antibiotics listed are generally associated with ototoxicity.

Ciprofloxacin has been associated with several cases of tendon injury and rupture, with the typical rupture occuring in the Achilles tendon. Other less severe side effects can include nausea and vomiting, headache, insomnia, and increased sensitivity to caffeine. The other symptoms listed are not generally associated with ciprofloxacin use.

Tetracycline antibiotics are strictly contraindicated in pregnancy, in lactating mothers, or in children under 8 years old, due to risk of irreversible teeth staining. The discoloration occurs only in adult teeth that have not broken the gum-line, so adults are not at risk.

The symptoms this patient are presenting with are consistent with serotonin syndrome, a rapid onset and potentially life-threatening condition of excess circulating serotonin. Symptoms can range from mild to severe, and may include tachycardia, nausea and vomiting, diarrhea, hyperreflexia, sweating, mydriasis, myoclonus, mental status changes, headache, and coma. Serotonin syndrome is generally caused by drug interaction or overdose of drugs that raise circulating serotonin levels, such as selective serotonin reuptake inhibitors (SSRI's) and monoamine oxidase inhibitors (MAOI's). 

The most likely cause of uncontrollable muscle movements in the absence of other systemic symptoms in a patient with a history of antipsychotic drug use is tardive dyskinesia. This is a disorder of rapid involuntary movements, most often in the face or head but also potentially affecting the extremities. It's exact cause is not well understood, but it is theorized to be an issue of sensitization of the D2 dopamine receptors after long-term neuroleptic use. 

While SSRI's have been known to cause a variety of adverse effects, including diminished libido, increased risk of suicide in children and adolescents, restlessness, photosensitivity, and increased risk of bone fracture, individuals taking SSRI's are not associated with any increased incidence of coronary heart disease.

Acetaminophen has surpassed viral hepatitis as the most common cause of acute hepatic failure in the United States. Hepatotoxicity can occur in doses of 7.5g or up for adults and 150millg/kg of body weight in children aged 1-6. None of the other drugs listed are particularly hepatotoxic.

Acetaminophen depletes glutathione, one of the body's most important antioxidants. The liver is the body's main processing organ for environmental and ingested toxins, and glutathione is the primary molecule the liver uses to rid itself of the harmful biproducts of the detoxification process. When glutathione is severely depleted, such as with acetaminophen overdose, hepatic cells can rapidly necrose, resulting in liver failure and even death. 

Alendronate is a bisphosphonate drug used in the treatment of osteoporosis and osteogenesis imperfecta. An individual taking this medication should be instructed to remain upright for a minimum of thirty minutes after ingestion in order to avoid esophagitis. Other gastrointestinal adverse effects of alendronate include esophageal strictures, achalasia, gastric ulcers, and gastritis. None of the other medications listed are associated with esophagitis. 

The most common side effects of beta blockers are fatigue, dizziness, weakness, cold hands or feet, dry mouth, headache, nausea, diarrhea, and shortness of breath.