GLP-1 Starter Guide: First-Dose Checklist and What to Expect

Your first-dose checklist

Ask your pharmacist or prescriber to help complete this list before taking the medicine:

• Confirm the brand, generic name, strength, and reason it was prescribed.
• Read the prescription label and the product's Medication Guide. For an injection, also read the Instructions for Use for that exact presentation.
• Confirm whether it is taken daily or weekly, what to do about a missed dose, and how to record each dose.
• Check storage temperatures and the discard date after first use or time outside the refrigerator. Write the relevant date on the package if needed.
• Have the pharmacist demonstrate the device. Confirm whether separate pen needles or syringes are required and which ones fit.
• Arrange a sharps container for used needles and injectable devices, following local disposal rules.
• Review all other prescription medicines, over-the-counter products, and supplements with your care team.
• Get a contact number for persistent side effects and a date for follow-up before any planned dose increase.

You do not need a supplement kit, a food scale, or a particular protein powder to begin treatment.

What these medicines do

GLP-1 is a hormone involved in appetite and blood-glucose regulation. GLP-1 receptor agonists act on that signaling system. Tirzepatide acts on both GIP and GLP-1 receptors. These medicines can reduce appetite and food intake and affect gastric emptying, but the benefits and approved uses differ by product.

Examples include Ozempic (semaglutide), a diabetes medicine with additional indications for certain patients, and Zepbound (tirzepatide), which is approved for weight reduction and maintenance in eligible adults and for moderate-to-severe obstructive sleep apnea in adults with obesity. See their current Ozempic prescribing information and Zepbound prescribing information.

Other brands and oral formulations have their own approvals and instructions. Brand names, devices, and doses are not interchangeable, even when the active ingredient is the same. Ask about a product approved for your condition rather than choosing from another person's prescription.

For background, read what GLP-1 is and GLP-1 medications explained. Experimental drugs are not a substitute for an approved prescription and are not part of this starter checklist.

Health information to discuss before starting

Tell your clinician about a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2 (MEN 2). Ozempic and Zepbound are contraindicated in those circumstances. Their boxed warnings are based on thyroid C-cell tumors in rodents; whether they cause these tumors in humans is unknown.

Also discuss previous serious medication allergies, pancreatitis, gallbladder problems, severe stomach-emptying problems, kidney disease, diabetic retinopathy, and difficulty eating enough. The labels warn about severe gastrointestinal reactions and do not recommend these products in severe gastroparesis. Do not diagnose gastroparesis from ordinary fullness alone.

If you take insulin or a sulfonylurea, ask about low-blood-sugar prevention and monitoring. Your clinician may need to adjust those medicines. Do not do that yourself, and do not stop insulin because you are starting a GLP-1.

Mention pregnancy, breastfeeding, or pregnancy plans. For example, the Ozempic label advises discontinuation at least two months before a planned pregnancy; discuss a safe alternative treatment plan with your prescriber. Zepbound's label advises stopping when pregnancy is recognized and contacting the clinician. For people using oral hormonal contraception, its label recommends switching to a non-oral method or adding a barrier method for four weeks after starting and for four weeks after each dose escalation.

Tell the team performing any planned surgery or procedure with anesthesia or deep sedation that you use a GLP-1. Delayed stomach emptying can affect procedural safety. Let that team give the instructions rather than stopping or continuing based on a generic online rule.

Injections, tablets, and storage

Learn the exact device

Pens, prefilled syringes, and vials do not all work the same way. Some pens have attached needles; others require a new compatible needle. Preparation steps, dose selection, hold time, and confirmation that a dose is complete vary.

Ozempic and Zepbound labeling describes subcutaneous injection in the abdomen, thigh, or upper arm. Follow your own device instructions about site selection and whether another person should give an upper-arm injection. Rotate sites as instructed and avoid damaged skin. Never share a pen, even if you change the needle.

If a device leaks or you are unsure whether a dose went in, do not automatically repeat the injection. Contact the pharmacist or manufacturer. See the injection guide and pen needle guide for questions to take to that conversation.

For redness or soreness, follow the device's site-care instructions. Contact your clinician for spreading redness, warmth, swelling, worsening pain, or a persistent lump. Trouble breathing or facial or throat swelling needs emergency help.

Tablets have their own instructions

An oral option may be appropriate for some patients, but food, water, and timing requirements depend on the product. Do not transfer instructions from an injection or another tablet. Ask before crushing a tablet, changing its timing, or moving it out of its original packaging.

Do not borrow another product's storage limit

There is no universal rule that an opened GLP-1 pen is safe for 56 days. Limits depend on the medicine and presentation. Check refrigeration, permitted time at room temperature, light protection, and the discard date for your exact package. Do not use an injectable product that has been frozen when its label says not to freeze it.

If the medicine got hot, froze, or spent an uncertain amount of time out of storage, ask the pharmacist or manufacturer before using it. The storage guide and travel guide can help you prepare the right questions.

Dose increases are a prescriber decision

Some products use gradual escalation to reduce gastrointestinal side effects. This does not mean every person moves up every four weeks or must reach the highest dose.

For example, the Zepbound label uses increases in 2.5 mg increments after at least four weeks on the current dose, with maintenance selection based on indication, response, and tolerability. A table that skips a strength or treats the maximum as everyone's goal is misleading.

This reflects the standard FDA-approved titration approach for that product. Your prescriber determines your actual dose. Do not adjust your dose without consulting them. Ask for a written plan, including what to do if side effects have not settled before a proposed increase.

A missed dose and an extra dose require different advice. Use the exact product's missed-dose instructions and confirm uncertainty with your pharmacist. After a suspected extra dose, contact Poison Control in the US at 1-800-222-1222 rather than applying a missed-dose rule. See accidental double doses.

Eating and drinking during the first weeks

Try smaller, manageable portions and eat slowly. Include protein foods such as eggs, yogurt, beans, tofu, fish, or poultry as tolerated, alongside carbohydrate foods, vegetables or fruit, and fats. Protein and fluid needs vary with body size, health conditions, activity, and the rest of your diet; a fixed minimum is not suitable for everyone.

Simple meal options include yogurt with oatmeal, egg with toast, rice with tofu, or chicken with a potato and cooked vegetables. If you feel unwell, adjust the portion and preparation rather than forcing a full plate.

For mild nausea, MedlinePlus self-care guidance suggests bland foods, small meals, fluids, avoiding strong odors, and sitting upright after eating. These are comfort strategies, not guarantees. See foods for nausea.

Keep fluids available and sip as tolerated. Follow any fluid restriction from your care team. Electrolyte products are not automatically needed for fatigue, and repeated vomiting requires medical advice rather than simply more supplements.

For constipation, increase fiber gradually if tolerated, maintain fluids within your care plan, and keep moving as you are able. MedlinePlus constipation guidance recommends gradual fiber changes and cautions against taking laxatives with severe pain, nausea, or vomiting without professional advice. Ask about persistent symptoms rather than continually adding fiber.

More practical help:

• Nutrition guide and protein planning.
• Foods that may worsen symptoms, without a universal banned-food list.
• Grocery shopping, meal preparation, and vegetable choices.
• Constipation support and food noise.

What to monitor in the first month

Keep a brief record of doses, symptoms, ability to eat and drink, and any measurements your clinician requests. If you have diabetes, follow the glucose-monitoring plan you were given. Bring the record to follow-up.

Appetite changes, side effects, and weight changes vary. There is no dependable weekly weight-loss target for every new user, and no nausea does not mean the medicine failed. Do not compare an early starting dose with someone else's longer-term treatment.

Gentle activity can be a starting point if appropriate for your health. Discuss strength training and an adequate eating plan as part of longer-term care, rather than relying on a supplement to prevent muscle loss. See the exercise guide.

Symptoms that should not wait for follow-up

Get prompt medical advice for repeated vomiting, inability to keep fluids down, very little urine, worsening dizziness, or persistent difficulty eating. Seek urgent assessment for severe or persistent abdominal pain, especially if it spreads to the back. Report vision changes promptly.

Call emergency services for trouble breathing, facial or throat swelling, collapse, seizures, or inability to wake. Severe confusion or inability to swallow during suspected low blood sugar also requires emergency help; never give food or drink to someone who cannot swallow safely.

The side-effects guide covers symptoms in more detail. Symptoms that are severe or worsening should not be dismissed as a normal first-week adjustment.

Planning beyond the first prescription

Before you run out, confirm refill timing, coverage requirements, and the follow-up appointment. If cost or access may interrupt treatment, tell your prescriber early; restarting after a gap may need new instructions. Do not substitute another person's medicine or return to an old dose without checking.

Useful next topics include insurance coverage, international travel, switching medicines, and stopping treatment. Keep the product's Medication Guide with your prescription so you can check its instructions when a question comes up.

Still choosing where to get a prescription? Compare GLP-1 telehealth providers by fees, follow-up visits, and insurance support.

Related guides

• How to Get a GLP-1 Prescription Online in 2026 (Step by Step)
• Blood Work and Monitoring on GLP-1 Medications
• GLP-1 Titration Anxiety: What to Track and Tell Your Prescriber
• GLP-1 Support Groups & Resources: Where to Find Community

This guide provides general education, not individualized medical advice. Your prescriber and pharmacist determine the instructions for your medicine and health needs.