Please assess the completion status of the following clinical trial:

Trial Title: Pre-medication With N-acetylcysteine and Simethicone to Improve Mucosal Visibility During Gastroduodenoscopy

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: DIAGNOSTIC
- Time Perspective: None
- Masking: TRIPLE
- Phase: None
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Adults (≥18-years) capable of giving written, informed consent will be included.~* All eligible subjects undergoing diagnostic endoscopy will be recruited in the study.~Exclusion Criteria:~* History of upperGI tract surgery,~* Gastric cancer~* Need for therapeutic endoscopy and emergency procedures,~* Recent upper GI bleeding~* Caustic ingestion,~* Pregnancy~* Diabetes mellitus~* Asthma~* Allergic reactions to the medications used in the study

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 80 Years
- Healthy Volunteers: t

Study Arms:
- No Intervention (Type: PLACEBO_COMPARATOR): In this arm, the participants will receive placebo ( 100 ml water) 10-30 minutes before the procedure under the supervision of a trained nurse. All patients will be given standard recommendations before the procedure: at least 8 hours of liquid and solid fasting.~During endoscopy, mucosal visibility will be evaluated in 6 segments (gastric antrum, lower gastric body, upper gastric body, fundus, first and second part of duodenum), using a scale ranging from 1 to 4 points: (1) no adherent mucus in the gastric mucosa examined; (2) a small amount of mucus in the gastric mucosa examined that does not hinder vision; (3) a large amount of mucus in the gastric mucosa examination, which can be washed thoroughly with \<50 mL of water; (4) a large amount of mucus in the gastric mucosa examined which requires ≥50 mL of water for washing.
- Simethicone 150 mg (Type: EXPERIMENTAL): In this arm, the participants will receive 150 mg simethicone dissolved in 100 ml water 10-30 minutes before the procedure under the supervision of a trained nurse.All patients will be given standard recommendations before the procedure: at least 8 hours of liquid and solid fasting.~During endoscopy, mucosal visibility will be evaluated in 6 segments (gastric antrum, lower gastric body, upper gastric body, fundus, first and second part of duodenum), using a scale ranging from 1 to 4 points:(1) no adherent mucus in the gastric mucosa examined; (2) a small amount of mucus in the gastric mucosa examined that does not hinder vision; (3) a large amount of mucus in the gastric mucosa examination, which can be washed thoroughly with \<50 mL of water; (4) a large amount of mucus in the gastric mucosa examined which requires ≥50 mL of water for washing.
- N Acetyl cysteine 600 mg (Type: EXPERIMENTAL): In this arm the participants will receive 600 mg N-acetyl cysteine dissolved in 100 ml water 10-30 minutes before the procedure under the supervision of a trained nurse.All patients will be given standard recommendations before the procedure: at least 8 hours of liquid and solid fasting.~During endoscopy, mucosal visibility will be evaluated in 6 segments(gastric antrum, lower gastric body, upper gastric body, fundus, first and second part of duodenum), using a scale ranging from 1 to 4 points:(1) no adherent mucus in the gastric mucosa examined; (2) a small amount of mucus in the gastric mucosa examined that does not hinder vision; (3) a large amount of mucus in the gastric mucosa examination, which can be washed thoroughly with \<50 mL of water; (4) a large amount of mucus in the gastric mucosa examined which requires ≥50 mL of water for washing.
- Simethicone (150 mg) plus N Acetyl cysteine 600 mg combination (Type: EXPERIMENTAL): In this arm, the participants will receive 150 mg simethicone and N-acetyl cysteine dissolved in 100 ml water 10-30 minutes before the procedure under the supervision of a trained nurse.All patients will be given standard recommendations before the procedure: at least 8 hours of liquid and solid fasting.~During endoscopy, mucosal visibility will be evaluated in 6 segments (gastric antrum, lower gastric body, upper gastric body, fundus, first and second part of duodenum), using a scale ranging from 1 to 4 points:(1) no adherent mucus in the gastric mucosa examined; (2) a small amount of mucus in the gastric mucosa examined that does not hinder vision; (3) a large amount of mucus in the gastric mucosa examination, which can be washed thoroughly with \<50 mL of water; (4) a large amount of mucus in the gastric mucosa examined which requires ≥50 mL of water for washing.

Based on this trial design, predict the completion outcome and termination type (if applicable).