Mental Health, Nerve Pain and Medication Reactions

Introduction

A pharmacy technician sees two kinds of information about every medicine. The first is what the medicine is: its name, its class and what it is commonly used for. The second is what happened when a real person took it: "it made me sleepy," "I broke out in hives," "I'm allergic to that."

This lesson teaches both kinds, using two commonly dispensed medicines: sertraline and gabapentin. It also teaches a skill you will use every working day. You will learn to pass a patient's reaction concern to the pharmacist accurately, without deciding yourself what caused it or what it means.

What You Will Be Able to Do

• Name the class of sertraline and gabapentin and give representative uses for each.
• Explain why the class name or the ingredient name alone does not tell you everything about a product or a patient.
• Tell the difference between a reported side effect, a reported allergy and a confirmed allergy.
• Record and pass on a reaction concern in factual words, without diagnosing it.
• Recognize when a concern cannot wait for routine handling.

Before You Start

You need everyday reading skills only. Two words will appear often:

• Generic name: the name of the active ingredient, such as sertraline.
• Brand name: a name a company gives its product, such as Zoloft.

Read a medicine identity before learning a name explains how to identify a product in more detail. This lesson explains everything it needs as it goes.

Two Medicines, Two Jobs

A drug class is a group of medicines that share a way of working or a chemical family. An indication is a reason a medicine is prescribed. Learning both helps you recognize a medicine quickly. Neither tells you a particular patient's diagnosis.

Sertraline: an SSRI antidepressant

Sertraline (brand: Zoloft) belongs to a class of antidepressants called selective serotonin reuptake inhibitors (SSRIs). Serotonin is a natural substance in the brain that helps maintain mental balance. Sertraline works by increasing the amount of serotonin available.

MedlinePlus lists these uses:

• depression
• obsessive-compulsive disorder (OCD)
• panic attacks
• posttraumatic stress disorder (PTSD)
• social anxiety disorder
• premenstrual dysphoric disorder (PMDD)

Notice that the class is called "antidepressant," yet several of these uses are anxiety-related conditions. A class name describes the medicine. It does not limit the medicine to one condition.

Several facts about sertraline matter when you talk with patients:

• The full benefit can take a few weeks or longer to appear. A patient who feels no change after a few days has not necessarily received the wrong medicine.
• Patients should not stop it without talking to their prescriber. Stopping suddenly can cause withdrawal symptoms, including nausea, dizziness, anxiety and sleep problems.
• It carries an important warning about mood. Medicines like sertraline may increase the risk of suicidal thoughts and actions in children, teenagers and young adults, especially early in treatment and after a dose increase.

Some instructions belong to one specific product, not to the whole drug or class. Sertraline comes as a tablet and as a liquid concentrate. The concentrate must be diluted before use, and only in the specific liquids its instructions list. The tablet has no dilution step. So "dilute before use" is a fact about the concentrate. It is not a rule for sertraline tablets or for every SSRI.

Gabapentin: an anticonvulsant also used for nerve pain

Gabapentin belongs to a class called anticonvulsants, which are medicines used against seizures. MedlinePlus lists these brand names: Neurontin, Gralise and Horizant. A listed brand name tells you a product association. It does not promise that the product is currently sold. It also does not prove that every listed product contains the same active ingredient: Horizant's official prescribing label identifies its active ingredient as gabapentin enacarbil, not gabapentin, as explained below.

Gabapentin has more than one use, and the use can depend on the product:

• Capsules, tablets and oral solution are used along with other medicines to help control certain seizures in people with epilepsy. They are also used to relieve postherpetic neuralgia (PHN), the burning or stabbing nerve pain that can last after shingles.
• Horizant, an extended-release tablet containing the related ingredient gabapentin enacarbil, is labeled for restless legs syndrome, an uncomfortable urge to move the legs, especially at night, and for PHN in adults.
• Gabapentin is also sometimes prescribed for other conditions, such as nerve pain from diabetes.

The mechanism helps explain the different uses. For seizures, gabapentin decreases abnormal excitement in the brain. For PHN, it changes the way the body senses pain. For restless legs, its exact mechanism is not known.

Gabapentin can cause drowsiness, dizziness and slowed thinking, and alcohol can add to the drowsiness. As with sertraline, patients should not stop it suddenly without talking to their doctor. Withdrawal symptoms can occur, and people taking it for seizures may have more seizures.

Worked example: what a prescription does and does not tell you

A patient picks up gabapentin capsules.

• What you can say: this is an anticonvulsant, and capsules are used for seizures and for PHN.
• What you cannot say: that the patient has epilepsy. The same capsule treats more than one condition, and it is sometimes prescribed for still others.

The medicine is evidence about what the prescriber chose. It is not evidence of the diagnosis. Never guess a diagnosis aloud from a medicine name.

Changed case: a related name, a different ingredient

Now change one fact. The prescription is for Horizant, an extended-release tablet. Its name is listed alongside gabapentin's brands, so is it interchangeable with the capsules?

No. Horizant's official prescribing label identifies its active ingredient as gabapentin enacarbil, not gabapentin. Gabapentin enacarbil is a prodrug of gabapentin. A prodrug is a medicine that the body changes into a different, active drug after it is taken. After a dose, the body converts gabapentin enacarbil into gabapentin, and the gabapentin produces the treatment effect.

That conversion does not make the products the same. The label states that Horizant is not substitutable with other gabapentin products, because the same dose results in different amounts of gabapentin in the blood. Its Medication Guide says Horizant is not the same medicine as gabapentin products such as Neurontin or Gralise and should not be used in their place. Horizant also has its own administration instructions: it is taken with food and swallowed whole, not cut, crushed or chewed. Its dosing schedule depends on what it is prescribed for, so follow the prescription and label rather than assuming one schedule. A related name does not mean a shared active ingredient, a shared formulation or a shared schedule, and it never means the products are interchangeable. Seizure medicines, nerve-pain uses and gout contrasts and Antidepressant identities, shared uses and different formulations go further with these contrasts.

Question 1

A coworker sees a prescription for sertraline and says, "This patient has depression." What is the problem with that statement?

Question 2

The pharmacy's records show a patient has filled gabapentin capsules for months. While filling a refill, you notice that the stock bottle you picked up is Horizant extended-release tablets, and the word "gabapentin" appears in the ingredient name on its label. What should happen?

Side Effects, Adverse Events and Allergies: Different Claims

Patients often use these words loosely. Your job is to keep them apart, because each one makes a different claim.

• Side effect: an effect a medicine can cause besides the intended one. Product information lists the common ones. Gabapentin's list includes drowsiness and dizziness. Sertraline's list includes nausea, diarrhea and sweating.
• Adverse event: any undesired occurrence during treatment, whether or not the medicine caused it. Calling something an adverse event records that it happened. It makes no claim about the cause.
• Adverse effect (also called an adverse reaction): an undesired effect that is attributed to, or suspected to be related to, a medicine or treatment. Adverse effects range from mild to severe and can be life-threatening.
• Drug allergy: a reaction in which the person's immune system, the body's defense system, reacts to the medicine as if it were harmful.

Some references use adverse event, adverse effect and adverse reaction as if they meant the same thing. Keep them apart in your own work. "Adverse event" describes what happened. "Adverse effect" or "adverse reaction" adds a judgment that the medicine was, or may have been, involved.

Allergy specialists note that many people who believe they are allergic to a medicine actually had a side effect. The two often look different:

• Common side effects often involve one body system. Examples include nausea, vomiting, diarrhea, dizziness, flushing and headache.
• Allergy signs include itching, rash or hives; swelling of the face, lips, tongue or throat; wheezing or difficulty breathing; and, in severe cases, collapse or loss of consciousness.

These lists are patterns, not a sorting machine. Some symptoms, such as rash, appear on both medicines' lists of serious side effects. You are not the one who decides which category a reaction belongs to.

Reported versus confirmed

Separate who is saying it from what has been established. Think of it as a ladder of evidence:

1. Reported reaction: "Gabapentin made me dizzy." The patient describes something that happened.
2. Reported allergy: "I'm allergic to sertraline." The patient uses the word allergy. This may or may not be a true allergy.
3. Confirmed allergy: an appropriately qualified clinician evaluated the reaction and documented that an allergy is present. An allergist, a doctor who specializes in allergy, is one example. The evaluation is based on the history and, when needed, testing.

A report deserves to be recorded and taken seriously at every rung. A report is still not a confirmation. Confirmation can also go the other way: a qualified clinician can sometimes show that a person is not allergic and remove an old allergy label. That decision belongs to the clinician, never to a technician's impression.

Worked example: a reported "allergy"

A patient says: "Put down that I'm allergic to sertraline. It made me nauseous."

Step 1: Separate the label from the description. The label is "allergic." The description is "nauseous."

Step 2: Notice what the description suggests. Nausea is a listed sertraline side effect, and it fits the single-system pattern. That makes a side effect plausible.

Step 3: Notice what you cannot conclude. You cannot conclude it was not an allergy, and you cannot conclude it was. You have one symptom and the patient's word.

Step 4: Act. Record the patient's own words: the drug, the reaction and when it happened. Then make sure the pharmacist sees the report. Do not quietly change "allergy" to "side effect," and do not refuse to record it.

Changed case: different symptoms

Change only the description: "Sertraline gave me hives, and my lips swelled up."

Hives and lip swelling are listed allergy signs, and sertraline's serious side effects include rash, hives, swelling and difficulty breathing. The pharmacist needs this report promptly.

If the patient is having lip or tongue swelling or trouble breathing right now, this is a possible emergency. Severe allergic reactions and difficulty breathing are reasons to call 911.

The reasoning did not change between the two cases. You still recorded and referred without diagnosing. What changed was the urgency, because the symptoms changed.

A second tempting mistake: "it happened after, so the drug caused it"

A reaction that begins after someone starts a medicine is worth reporting. The timing alone does not prove the medicine caused it. Allergy specialists give an example: children who develop a rash while taking an antibiotic during a viral illness often have a rash caused by the infection, not an allergy.

Recording a symptom as an adverse event records that something unwanted happened during treatment. It does not settle the cause. Calling it an adverse effect or adverse reaction already suggests the medicine was involved, so do not use those words as if they were neutral. Sorting out the cause is clinical work for the pharmacist and prescriber.

Question 3

Label each statement as a reported side effect, a reported allergy or a confirmed allergy.

• (a) "Gabapentin makes me drowsy in the afternoons."
• (b) "I'm allergic to gabapentin. I got a headache once."
• (c) "My allergist tested me and confirmed I'm allergic to that medicine. Here's the letter."

Question 4

A patient's profile lists "gabapentin: allergy." The patient says, "That was just dizziness years ago. You can take it off." May you delete the allergy?

Communicating a Concern Without Diagnosing It

Diagnosing means deciding what a problem is or what caused it. Describing means reporting what was observed or said. Technicians describe. The pharmacist evaluates.

The PTCE content outline lists adverse drug events, allergies and drug interactions among the issues that require pharmacist intervention. The broader skill is taught in Recognize when the pharmacist must intervene.

What a useful report contains

The questions allergy specialists use to understand a reaction also make a good checklist for your note:

• which medicine and which product (form, strength, brand or generic)
• when the patient started it, whether it was the first time, and whether they have stopped it
• how long after a dose the symptoms began, and what they were, in the patient's words
• how long the symptoms lasted and what the patient did about them
• whether the patient needed emergency care
• every other medicine the patient takes, including over-the-counter products, vitamins, supplements and herbals

The FDA advises patients to share all of these with their doctor or pharmacist. Interactions can come from any of them.

Worked example: rewrite a diagnosing note

Diagnosing note: "Pt allergic to Zoloft — rash. Told pt to stop taking it."

This note contains two problems:

• "Allergic" is a conclusion, not an observation.
• Telling the patient to stop is clinical advice. Both sertraline and gabapentin instructions warn patients not to stop without talking to their doctor, partly because stopping suddenly can cause withdrawal symptoms.

In this fictional case, assume the technician asked the patient the checklist questions and learned these additional facts: the rash is red, itchy and on the arms; it started 2 days after beginning sertraline 1 week ago; the patient reports no swelling or breathing trouble; the patient is still taking sertraline; and the patient also takes OTC ibuprofen.

Describing note: "Pt reports red, itchy rash on arms that started 2 days after beginning sertraline 1 week ago. No swelling or breathing trouble reported. Pt still taking it. Also takes OTC ibuprofen. Referred to pharmacist now."

The second note keeps the original fact, makes no diagnosis and gives no advice. Its extra details appear only because the patient supplied them when asked. Never add timing, other medicines or statements such as "no other symptoms" just to make a note look complete. If you don't know a detail, ask the patient; if they don't know, leave it out or record that it is unknown.

Possible interactions: name the concern, not the outcome

A source listing two products as possibly interacting tells you to raise the question. It does not tell you what will happen. MedlinePlus lists aspirin and NSAIDs such as ibuprofen and naproxen, along with St. John's wort and tryptophan, as products that may interact with sertraline. It lists NSAIDs as possibly interacting with gabapentin too.

A good statement is: "Let me have the pharmacist check that with your other medicines." Do not predict an effect you were not taught, and do not tell the patient the combination is safe. Duplication, interactions and contraindications covers interactions in depth.

Urgency: when a concern cannot wait

Most reaction reports go to the pharmacist promptly during normal workflow. Some cannot wait. Call 911 for these situations:

• difficulty breathing
• a severe allergic reaction
• unconsciousness
• any situation where a person's life is in immediate danger

Gabapentin's information also names bluish lips or skin, confusion and extreme sleepiness alongside breathing difficulty. Its overdose advice calls for 911 if a person has collapsed, had a seizure, has trouble breathing or can't be awakened.

These examples are not a complete checklist. A person can be in danger without showing one of the signs named here. If the situation seems dangerous, follow your pharmacy's emergency procedure and involve the pharmacist immediately. Do not reason that "it isn't on the list, so it can wait."

Mood changes deserve the same seriousness. Both medicines' information tells patients to call their doctor right away about new or worsening depression or anxiety, agitation, or thoughts of self-harm. If a patient or caregiver mentions thoughts of self-harm, bring in the pharmacist at once. If someone is in immediate danger, call 911.

Worked example: two calls, two urgency levels

Call A: "My father started gabapentin last week. Today he's very hard to wake up and his lips look bluish."

The caller describes difficulty waking and bluish lips, which match gabapentin's serious warnings and its 911 guidance. Their father's life may be in immediate danger. The caller needs to call 911 now, and the pharmacist needs to know at once. Do not spend time collecting a full history first.

Changed case, Call B: "My father started gabapentin last week and has been a bit dizzy the first few days. He's otherwise fine."

Dizziness is a listed common side effect, and nothing in the call suggests immediate danger. Record what the caller said and route the call to the pharmacist.

You are still not deciding that the dizziness is harmless. You are judging how fast the report must move, not what it means.

Question 5

Rewrite this note so that it describes rather than diagnoses: "Gabapentin side effect: drowsiness, not serious."

Question 6

A patient taking sertraline calls and says their tongue feels swollen and it's getting harder to breathe. What do you do?

Independent Practice

Question 7

For each medicine, give its class and one representative use.

• (a) Zoloft
• (b) Neurontin
• (c) Horizant

Question 8

A patient picking up sertraline also places a bottle of naproxen on the counter and asks, "These are fine together, right?" What should you say and do?

Question 9

A patient who started sertraline four days ago says, "It's not doing anything. I'm going to quit taking it." How do you respond?

Question 10

A patient started gabapentin five days ago. They also caught a cold three days ago, and today they have an itchy rash. They ask, "Is this an allergy to the gabapentin?" What can and can't you conclude, and what should you do?

Question 11

Which note is better, and why?

• (a) "Pt had allergic reaction to sertraline."
• (b) "Pt reports nausea and headache starting the day after first sertraline dose; resolved on their own after 3 days; no rash, swelling or breathing trouble; also takes a St. John's wort supplement. Referred to pharmacist."

What to Remember

• Sertraline (Zoloft) is an SSRI antidepressant. Its uses include depression, OCD, panic attacks, PTSD, social anxiety disorder and PMDD.
• Gabapentin (Neurontin and others) is an anticonvulsant. It is used for certain seizures and for nerve pain after shingles. Horizant contains a different active ingredient, gabapentin enacarbil, a prodrug that the body converts into gabapentin. It is labeled for restless legs syndrome and postherpetic neuralgia in adults and cannot be substituted for gabapentin products.
• A medicine does not reveal a diagnosis, and a related name or a shared ingredient does not make products interchangeable.
• A side effect is not the same as an allergy, which involves the immune system. An adverse event is not the same as an adverse effect: an event records what happened during treatment, while an adverse effect or reaction suggests the medicine was involved. A reported allergy is not the same as a confirmed one, which a qualified clinician has evaluated and documented. Record what the patient says and leave the conclusions to clinicians.
• Timing is not proof. A reaction after starting a medicine is worth reporting, but it does not establish the cause.
• Describe, don't diagnose. Note the drug and product, the timing, the symptoms in the patient's words, what was done, and all other medicines and supplements, using only what the patient actually told you. Then bring in the pharmacist.
• Don't advise stopping, starting or combining medicines. Refer those questions.
• Urgency depends on the situation, not on a checklist. Trouble breathing, a severe allergic reaction, unconsciousness or any immediate danger to life means calling 911 now.
• Exact documentation procedures differ. Your workplace policies and your state's rules decide who records what and how. Federal reporting programs such as FDA MedWatch exist alongside those local requirements; they do not replace them. Report errors and improve the system covers reporting.