A nurse is administering tetracycline, a broad-spectrum antibiotic, to a patient who has acne vulgaris.
The nurse should monitor the patient for which of the following adverse effects of this medication? (Select all that apply.)

The client should avoid sexual intercourse until treatment is completed.This is because trichomoniasis is a sexually transmitted infection that can be passed between partners during penile-vaginal sex or through transmission of infected vaginal fluids or fomites among women who have sex with women. Therefore, abstaining from sex until both partners are cured can prevent reinfection and transmission.

Choice A is wrong because taking the medication with an antacid can reduce its absorption and effectiveness.Tinidazole should be taken with food to minimize gastrointestinal side effects.

Choice B is wrong because drinking plenty of fluids to prevent crystalluria is not relevant for tinidazole.

Crystalluria is a condition where crystals form in the urine, which can cause kidney stones or damage.This is a potential complication of some antibiotics, such as sulfonamides, but not tinidazole.

Choice D is wrong because chewing the tablets thoroughly before swallowing is not necessary for tinidazole.Tinidazole tablets are film-coated and can be swallowed whole with water.

Chewing the tablets may alter their release and absorption, and may also cause a bitter aftertaste.

Anaphylaxis is a severe allergic reaction that can be life-threatening and requires immediate medical attention.Penicillin is one of the most common causes of anaphylaxis.Symptoms of anaphylaxis include difficulty breathing, swelling of the face, throat, or tongue, hives, itching, low blood pressure, and shock.

Choice A is wrong because hypokalemia (low potassium levels in the blood) is not a common or serious side effect of penicillin therapy.Hypokalemia can cause muscle weakness, cramps, irregular heartbeat, and fatigue.

Choice B is wrong because hyperglycemia (high blood sugar levels) is not a common or serious side effect of penicillin therapy.Hyperglycemia can cause thirst, frequent urination, blurred vision, and headaches.

Choice D is wrong because constipation is not a common or serious side effect of penicillin therapy.Constipation can cause abdominal pain, bloating, and difficulty passing stools.