No one likes to be sick, but Mucinex 12-Hour Chest Congestion Expectorant Tablets makes every sick day a little easier. Mucus is a master of mayhem. It crowds your nose, throat and makes you miserable.

Does Mucinex Start Working Quickly?

The best chest congestion medicine provides quick, long-lasting relief. When it comes to chest congestion medicine, Mucinex provides great relief. And that relief is just one dose away. Mucinex expectorant tablets get to work fast and last for 12 hours. Mucinex 12-Hour Chest Congestion Expectorant Tablets give you the relief you need whenever the untimely cold comes your way.

What Does Mucinex Relieve?

Mucinex 12-Hour Chest Congestion Expectorant Tablets relieves chest congestion that's caused by excessive mucus. Mucinex works by thinning and loosening mucus. And with extended release, Bi-Layer™ tablets, you'll have effective relief for up to 12 hours. Chest congestion occurs when the mucus membranes in your airways are pushed into overdrive. Whether it's the common cold or irritants like dust, your mucus membrane becomes inflamed and causes excess mucus buildup in your airways. The buildup of mucus serves as a way to rid your body of your illness or the irritant your breathed in. Mucinex helps dissolve the mucus buildup so you can breathe normally again.

Active Ingredient

Contains Guaifenesin which is an expectorant that relieves chest congestion and thins and loosens mucus making coughs more productive. Guaifenesin 600 mg is an expectorant that helps reduce chest congestion caused by colds, infections, or allergies. It works by thinning the mucus in the air passages and makes it easier to cough up.

Stock Up Now

Stock up on Mucinex now. Future you will be very glad you did. Conveniently order your medicine online and have it shipped to your doorstep. Or pick up the Mucinex during your next trip to your local Sam's Club.

Specifications

• Use Instructions: Do not crush, chew, or break tablet. Take with a full glass of water. This product can be administered without regard for timing of meals. Adults and children 12 years of age and over: 1 or 2 tablets every 12 hours. Do not exceed 4 tablets in 24 hours. Children under 12 years of age: do not use. Use as directed
• Purchase Includes: 120ct unique bi-layer tablet, one layer for immediate release and one layer for extended release
• FSA/HSA Eligible: Yes
• Allergens + Warnings: Ask a doctor before use if you have persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema, cough accompanied by too much phlegm (mucus). Stop use and ask a doctor if cough lasts more than 7 days, comes back, or occurs with fever, rash, or persistent headache. These could be signs of a serious illness. If pregnant or breast-feeding, ask a health professional before use
• Ingredients: Guaifenesin, Carbomer Homopolymer, Type B; FD&C Blue No. 1, Aluminum Lake, Hypromellose, USP; Magnesium Stearate, NF; Microcrystalline Cellulose, NF; Sodium Startch Glycolate, NF *IQVIA using ProVoice Survey, December 2022 U.S. News & World Report/Pharmacy Times 2023-2024. **Product eligibility may vary by plan. Check with your benefits administrator to determine which expenses are eligible before you shop. While we strive to obtain accurate product information, we cannot guarantee or ensure the accuracy, completeness or timeliness of any product information. Carefully read and follow all package directions. SamsClub.com assumes no liability for inaccuracies or misstatements about products.

🇰🇷 한국 고객 안내 (업데이트)

✈️ 배송 안내 — 개인통관부호 필수

해외 직배송 제품은 반드시 아래 정보를 정확히 입력해주세요:

• ✅ 개인통관부호
• ✅ 수령인 성명
• ✅ 연락 가능한 전화번호
• ✅ 정확한 우편번호 (5자리)

위 정보 중 하나라도 일치하지 않을 경우, 통관이 지연되거나 반송될 수 있습니다.

👉 개인통관부호 발급/확인: https://unipass.customs.go.kr/csp/persIndex.do

🇯🇵 일본 고객 안내

✈️ 配送に関する重要なお知らせ

日本へのお届けには、以下の点にご注意ください：

• ✅ 必ず自宅住所（会社・事業所住所は不可）
• ✅ 本名（戸籍上の氏名）
• ✅ 正確な電話番号
• ✅ 正確な郵便番号

上記が正確でない場合、通関が遅延または返送される場合があります。

📦 Product & Packaging Updates
Packaging may change without prior notice. Rest assured — only the packaging differs; ingredients and product quality remain the same.

⚕️ Health Disclaimer
This product is not intended to diagnose, treat, cure, or prevent any disease. Please read all labels and instructions carefully before use. Consult a healthcare professional if you have any questions.

🔄 교환 및 환불 정책

1️⃣ 잘못 배송되었거나 손상된 상품
상품이 잘못 배송되었거나 손상된 경우, 사진 증빙 검토 후 전액 환불 또는 동일 상품으로 교환해 드립니다. 검토 과정에서 추가 정보를 요청드릴 수 있습니다.

2️⃣ 단순 변심
단순 변심으로 인한 교환·환불은 미국으로의 반송 배송이 필요하며, 왕복 국제 배송비는 고객 부담입니다. 배송비는 품목·무게·목적지에 따라 달라질 수 있습니다.

❌ 주문 취소 정책

⏰ 취소 가능 기간
주문 당일 오후 5시 (한국 시간) 이전에 1:1 문의를 통해 요청하신 경우에만 취소가 가능합니다.
취소 처리는 시스템 반영까지 다소 시간이 걸릴 수 있습니다.

🚫 취소 불가 경우
아래 경우에는 취소가 불가합니다:

• 주문 상태가 "배송 준비 중" 또는 "배송 완료" 로 변경된 경우
• 주말 또는 공휴일에 접수된 요청