Dietetic and behavioral restrictions which should be observed before during and after the course of Pañcakarma therapy are called as ParihāraViṣayas.

उच्चैर्भाष्यमत्याशनमतिस्थानमतिचङ्क्रमणं क्रोधशोकहिमातपावश्यायातिप्रवातान् यानयानं ग्राम्यधर्ममस्वपनं निशि दिवा स्वप्नं विरुद्धाजीर्णासात्म्याकालप्रमितातिहीनगुरुविषमभोजनवेगसन्धारणोदीरणमिति भावानेतान्मनसाऽप्यसेवमानः सर्वमहो गमयस्वेति  | स तथा कुर्यात्||              (Cha.Su.15/15)

भोज्योऽन्नंमात्रयापास्यन्श्वःपिबन्पीतवानपि|
द्रवोष्णमनभिष्यन्दिनातिस्निग्धमसङ्करम्||

उष्णोदकोपचारीस्याद्ब्रह्मचारीक्षपाशयः|
नवेगरोधीव्यायामक्रोधशोकहिमातपान्||
प्रवातयानयानाध्वभाष्यात्यासनसंस्थितीः|
नीचात्युच्चोपधानाहःस्वप्नधूमरजांसिच||
यान्यहानिपिबेत्तानितावन्त्यन्यान्यपित्यजेत्|
सर्वकर्मस्वयंप्रायोव्याधिक्षीणेषुचक्रमः||                                                      (A. H. Su. 16/25-28)

Take proper quantity of food which is simple, hot and liquid in nature, containing only little fat  and not obstructing the channels, Should take hot water for all purposes, Should maintain celibacy, Should sleep during night time only, Should not do suppression or induce natural urges (Mala, Mūtra and Anila Vega), Should not do exercise, loud speech, Avoid anger, depression and Avoid exposure to mist, sunlight, breeze.

1. PeyādiAnna Saṃsarjana Krama

पेयांविलेपीमकृतंकृतंचयूषंरसंत्रीनुभयंतथैकम्|
क्रमेणसेवेतनरोऽन्नकालान्प्रधानमध्यावरशुद्धिशुद्धः||                       (A. H. Su. 18/29)

Peya (thin gruel), Vilepī (thick gruel), Akṛta or KṛtaYūṣa (soup) and Akṛta  or Kṛta Māmsa rasa (mutton soup) can be given to the persons who had Pravara Śuddhi for 3 Anna Kālas. For the persons who had MadhyamaŚuddhi for 2 Anna Kālas while it should be given for 1 Anna Kāla in AvaraŚuddhi.

Indication of PeyādiSaṃsarjana Krama

संशोधनास्रविस्रावस्नेहयोजनलङ्घनैः||
यात्यग्निर्मन्दतांतस्मात्क्रमंपेयादिमाचरेत्|                            (A. H. Su. 18/46)

Soon after the elimination therapy, bloodletting, oleation, Langhana etc. The digestive power gets impaired. Hence ‘PeyādiSaṃsarjana Krama ‘is to be followed.

2. TarpaṇādiSaṃsarjana

कफपित्ते विशुद्धेऽल्पं मद्यपे वातपैत्तिके|
तर्पणादिक्रमं कुर्यात् पेयाऽभिष्यन्दयेद्धि तान्||                               (Cha .Si.  6/25)

When there is little elimination of Kapha and Pitta through purification therapy, in alcoholics and in persons with predominance of Vāta and Pitta Doṣa, the dietary regimen called Tarpaṇādi Krama need to be started instead of  Peyādi Krama, as Peyādimay increase Kapha causing Abhiṣyanda (clogging of the channels of circulation).

तर्पणादिविषयमाह- कफपित्ते इत्यादि| विशुद्धेऽल्पमिति असम्यग्विशुद्धे|

तर्पणादिक्रमे च पेयायाः स्थाने स्वच्छतर्पणं, विलेप्याः स्थाने च घनतर्पणं देयम्||

(Cha. Si. 6/25, Chakrapani commentary)

As per the Commentator Cakrapani, SvacchaTarpaṇa can be served instead of Peya and Ghana Tarpaṇa instead of Vilepī and according to the Commentator Jejjata, due to the similarities MudgaYūṣa and Māmsarasa can be given as Tarpaṇa.

प्रथमेऽन्नकाले लाजसक्तवो द्वितीयेऽन्नकाले मांसरसौदनमित्येष तर्पणादिक्रमस्तेषां हितः|

• Su. 18/40, Aruṇadattacommentary)

3. Rasa Saṃsarjana Krama

संसर्गेणविवृद्धेऽग्नौदोषकोपभयाद्भजेत् |                (Su. Chi. 39/19)

Agni will increase after Saṃsarjana Krama. To avoid DoṣaKopa due to increased Agni, Rasa Saṃsarjana Krama is to be followed.

अग्निसन्धुक्षणार्थंतुपूर्वंपेयादिनाभिषक्|
रसोत्तरेणोपचरेत्क्रमेणक्रमकोविदः||
स्निग्धाम्लस्वादुहृद्यानिततोऽम्ललवणौरसौ|
स्वादुतिक्तौततोभूयःकषायकटुकौततः||
अन्योऽन्यप्रत्यनीकानांरसानांस्निग्धरूक्षयोः|
व्यत्यासादुपयोगेनप्रकृतिंगमयेद्भिषक्||                             (Cha. Si. 12/6-8)

After VamanādiSamśodhana Karma, the Jatarāgni should be made strong by giving Peya first and Māmsarasaat last. The patient should be given a sequence of rasa with Snigdha (unctuous), Amla (sour), Svādu (sweet) and Hṛdya (pleasing) food, with sour and salty taste should be given, then the food having Svādu and Tikta  taste and lastly the food articles having astringent and pungent tastes should be given.

Benefits of Saṃsarjana Krama

यथाऽणुरग्निस्तृणगोमयाद्यैःसन्धुक्ष्यमाणोभवतिक्रमेण|
महान्स्थिरःसर्वपचस्तथैवशुद्धस्यपेयादिभिरन्तराग्निः||                                   (A. H. Su. 18/30)

Just as small flame of fire gets ignited by addition of Tṛṇa (dry grass), Gomaya (dry cow dung), etc , in the same way the Agni which has become Manda due to Śodhana will get increased by Saṃsarjana Krama. Agni of a person after Saṃsarjana Krama become strong and stable, can digest any kind of food.